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Enhanced fill factor and stability of perovskite solar cells with a multifunctional additive of starch-iodine complex EI
期刊论文 | 2024 , 602 | Journal of Power Sources
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Abstract :

The efficiency and stability of perovskite solar cells (PSCs) can be greatly affected by various factors such as passivating the perovskite film, oxidizing the hole-transport material of 2,2′,7,7′-tetras(N,N-p-methoxyaniline)-9,9′-spirodifluorene (Spiro-OMeTAD), and inhibiting the iodide migration. Here we introduce a multifunctional starch-iodine complex in the perovskite film to enhance the fill factor and stability of PSCs. Results demonstrate that the starch-iodine complex from the perovskite film can release iodine molecules to gently oxidize the Spiro-OMeTAD, which can significantly increase the PSC's fill factor. Moreover, the remaining starch can effectively passivate the perovskite film to obviously improve the PSC's long-term stability. Furthermore, the starch-iodine complex can absorb and store the iodide ions to generate a starch-triiodide complex, which can release iodide ions to promote iodide defect self-healing and suppress iodide migration in the perovskite films, resulting in a further enhancement of the PSC's long-term stability. As a result, the PSC based on the starch-iodine complex obtains a superior cell efficiency of 22.60% with a high fill factor of 79.54%, and keeps 91.12% of its original efficiency after 1500 h. © 2024 Elsevier B.V.

Keyword :

Efficiency Efficiency Passivation Passivation Perovskite Perovskite Perovskite solar cells Perovskite solar cells Stability Stability Starch Starch

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GB/T 7714 Wang, Yunpeng , Xiao, Yaoming , Wang, Lidan et al. Enhanced fill factor and stability of perovskite solar cells with a multifunctional additive of starch-iodine complex [J]. | Journal of Power Sources , 2024 , 602 .
MLA Wang, Yunpeng et al. "Enhanced fill factor and stability of perovskite solar cells with a multifunctional additive of starch-iodine complex" . | Journal of Power Sources 602 (2024) .
APA Wang, Yunpeng , Xiao, Yaoming , Wang, Lidan , Su, Zisheng , Xu, Yunpeng , Fan, Liangbiao et al. Enhanced fill factor and stability of perovskite solar cells with a multifunctional additive of starch-iodine complex . | Journal of Power Sources , 2024 , 602 .
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N-doped carbon-enveloped CoSe2/NiSe2@Cu2Se core-shell nanospheres as non-Pt electrocatalysts for enhanced wide-pH hydrogen evolution reactions EI
期刊论文 | 2024 , 1001 | Journal of Alloys and Compounds
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Abstract :

An available approach to ameliorate the property of electrocatalysts for transition metal selenides (TMSs) is to transform their structure, morphology, and elemental composition, especially for hydrogen evolution reactions (HER), which can be a long-term task. In this work, Ni-Co nanospheres were synthesized by a hydrothermal method, and then in the synchronous processes of selenization and carbonization, it reacted with the peripherally coated melamine-copper complex, which was the reactant between melamine and copper ions. Ultimately, CoSe2/NiSe2@Cu2Se-NC nanospheres with a core-shell structure were synthesized after annealing process. This special structure provided more active attachment sites, enabling CoSe2/NiSe2@Cu2Se-NC to exhibit excellent HER properties under wide-pH range. Especially, in acidic conditions, it had a low initial potential of 41.0 mV, a small Tafel slope value of 48.7 mV dec–1, and a long service life. The proposed scheme indicates that a new approach will be added to the synthesis of electrocatalysts based on TMSs. © 2024 Elsevier B.V.

Keyword :

Binary alloys Binary alloys Carbon Carbon Carbonization Carbonization Cobalt alloys Cobalt alloys Cobalt compounds Cobalt compounds Copper compounds Copper compounds Doping (additives) Doping (additives) Electrocatalysts Electrocatalysts Electrolysis Electrolysis Hydrogen Hydrogen Metal ions Metal ions Nanospheres Nanospheres Nickel compounds Nickel compounds pH pH Selenium compounds Selenium compounds Shells (structures) Shells (structures) Transition metals Transition metals

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GB/T 7714 Guo, Ming , Chen, Siyan , Xiong, Yonglian et al. N-doped carbon-enveloped CoSe2/NiSe2@Cu2Se core-shell nanospheres as non-Pt electrocatalysts for enhanced wide-pH hydrogen evolution reactions [J]. | Journal of Alloys and Compounds , 2024 , 1001 .
MLA Guo, Ming et al. "N-doped carbon-enveloped CoSe2/NiSe2@Cu2Se core-shell nanospheres as non-Pt electrocatalysts for enhanced wide-pH hydrogen evolution reactions" . | Journal of Alloys and Compounds 1001 (2024) .
APA Guo, Ming , Chen, Siyan , Xiong, Yonglian , Chen, Ming , Xia, Juan , Chen, Wenbin et al. N-doped carbon-enveloped CoSe2/NiSe2@Cu2Se core-shell nanospheres as non-Pt electrocatalysts for enhanced wide-pH hydrogen evolution reactions . | Journal of Alloys and Compounds , 2024 , 1001 .
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Self-Catalyzed Synthesis of Length-Controlled One-Dimensional Nickel Oxide@N-Doped Porous Carbon Nanostructures from Metal Ion Modified Nitrogen Heterocycles for Efficient Lithium Storage SCIE
期刊论文 | 2024 , 40 (9) , 4852-4859 | LANGMUIR
WoS CC Cited Count: 6
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Abstract :

Transition metal oxides with the merits of high theoretical capacities, natural abundance, low cost, and environmental benignity have been regarded as a promising anodic material for lithium ion batteries (LIBs). However, the severe volume expansion upon cycling and poor conductivity limit their cycling stability and rate capability. To address this issue, NiO embedded and N-doped porous carbon nanorods (NiO@NCNR) and nanotubes (NiO@NCNT) are synthesized by the metal-catalyzed graphitization and nitridization of monocrystalline Ni(II)-triazole coordinated framework and Ni(II)/melamine mixture, respectively, and the following oxidation in air. When applied as an anodic material for LIBs, the NiO@NCNR and NiO@NCNT hybrids exhibit a decent capacity of 895/832 mA h g(-1) at 100 mA g(-1), high rate capability of 484/467 mA h g(-1) at 5.0 A g(-1), and good long-term cycling stability of 663/634 mA h g(-1) at 600th cycle at 1 A g-1, which are much better than those of NiO@carbon black (CB) control sample (701, 214, and 223 mA h g(-1)). The remarkable electrochemical properties benefit from the advanced nanoarchitecture of NiO@NCNR and NiO@NCNT, which offers a length-controlled one-dimensional porous carbon nanoarchitecture for effective e-/Li+ transport, affords a flexible carbon skeleton for spatial confinement, and forms abundant nanocavities for stress buffering and structure reinforcement during discharge/charging processes. The rational structural design and synthesis may pave a way for exploring advanced metal oxide based anodic materials for next-generation LIBs.

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GB/T 7714 Chen, Ming , Zhao, Ming-Yang , Liu, Feng-Ming et al. Self-Catalyzed Synthesis of Length-Controlled One-Dimensional Nickel Oxide@N-Doped Porous Carbon Nanostructures from Metal Ion Modified Nitrogen Heterocycles for Efficient Lithium Storage [J]. | LANGMUIR , 2024 , 40 (9) : 4852-4859 .
MLA Chen, Ming et al. "Self-Catalyzed Synthesis of Length-Controlled One-Dimensional Nickel Oxide@N-Doped Porous Carbon Nanostructures from Metal Ion Modified Nitrogen Heterocycles for Efficient Lithium Storage" . | LANGMUIR 40 . 9 (2024) : 4852-4859 .
APA Chen, Ming , Zhao, Ming-Yang , Liu, Feng-Ming , Li, Meng-Ting , Zhang, Meng-Lei , Qian, Xing et al. Self-Catalyzed Synthesis of Length-Controlled One-Dimensional Nickel Oxide@N-Doped Porous Carbon Nanostructures from Metal Ion Modified Nitrogen Heterocycles for Efficient Lithium Storage . | LANGMUIR , 2024 , 40 (9) , 4852-4859 .
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Fe2P-coated Ni2P/Co2P yolk-shelled porous nanospheres as advanced Pt-free electrocatalysts for efficient pH-universal hydrogen evolution EI
期刊论文 | 2024 , 78 , 851-860 | International Journal of Hydrogen Energy
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Abstract :

At present, the exploration of renewable energy is a huge challenge, and water electrolysis is regarded as a promising method for producing hydrogen. However, the hydrogen evolution reaction (HER) has been hampered due to expensive Pt-based catalysts. Herein, the Fe2P-coated Ni2P/Co2P nanospheres with yolk-shelled structure were successfully synthesized according to a facile approach of doping transition metal elements and phosphating on the template Ni-Co nanospheres, successively. All samples were tested as HER catalysts at various pH environments. The results showed that the Fe2P-Ni2P/Co2P possesses superior electrocatalytic ability and good stability. The Fe2P-Ni2P/Co2P achieved the lower ηonset (overpotential at 1.0 mA cm−2) of 36.6, 64.2, and 65.9 mV, η10 (overpotential at 10 mA cm−2) of 89.7, 125, and 212 mV, and Tafel slopes of 48.0, 60.3, and 135 mV dec−1 in acidic, alkaline, and neutral solutions, respectively, exhibiting an excellent electrocatalytic activity of the multicomponent phosphides for HER. © 2024 Hydrogen Energy Publications LLC

Keyword :

Alkalinity Alkalinity Binary alloys Binary alloys Cobalt alloys Cobalt alloys Cobalt compounds Cobalt compounds Electrocatalysts Electrocatalysts Electrolysis Electrolysis Hydrogen production Hydrogen production Nanospheres Nanospheres Phosphorus compounds Phosphorus compounds Transition metals Transition metals

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GB/T 7714 Chen, Wenbin , Chen, Siyan , Guo, Ming et al. Fe2P-coated Ni2P/Co2P yolk-shelled porous nanospheres as advanced Pt-free electrocatalysts for efficient pH-universal hydrogen evolution [J]. | International Journal of Hydrogen Energy , 2024 , 78 : 851-860 .
MLA Chen, Wenbin et al. "Fe2P-coated Ni2P/Co2P yolk-shelled porous nanospheres as advanced Pt-free electrocatalysts for efficient pH-universal hydrogen evolution" . | International Journal of Hydrogen Energy 78 (2024) : 851-860 .
APA Chen, Wenbin , Chen, Siyan , Guo, Ming , Jiang, Xiancai , Xia, Juan , Chen, Ming et al. Fe2P-coated Ni2P/Co2P yolk-shelled porous nanospheres as advanced Pt-free electrocatalysts for efficient pH-universal hydrogen evolution . | International Journal of Hydrogen Energy , 2024 , 78 , 851-860 .
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Controllable synthesis and growth mechanism of cracked cowpea-like NCNT encapsulated with Fe3N nanoparticles for high-performance anode material in lithium-ion batteries Scopus
期刊论文 | 2024 , 230 | Carbon
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Abstract :

Fe3N nanocrystals embedded in cracked N-doped carbon nanotubes (Fe3N@NCNT) with a cowpea-like shape are innovatively prepared by metal-catalyzed graphitization and nitridization processes based on melamine and FeC2O4 precursor. The new in-situ synthesis strategy is proved to be effective to open the NCNT using a migratory metal carbide nanocatalyst via expansion effect and fabricate a metal nitride embedded NCNT with fully active ingredients. The detailed tip-growth mechanism of cracked NCNT with latitudinal-longitudinal graphene layers is studied by in-situ XRD analysis of the phase evolution of melamine and FeC2O4, and ex-situ SEM/TEM investigation of the topography correlation of NCNT and Fe3C floating catalyst. The Fe3N@NCNT microclews based anodes have a moderate carbon content of 35.45 wt%, electroactive NCNT conductive network, abundant microcracks and an open short-cavity system, showing a stable discharge capacity of 667 mAh g−1 at 0.1C, outstanding rate capability of 448 mAh g−1 at 5C and remarkable long-term cycling stability of 546 mAh g−1 after 600 cycles at 1C. The combined good electronic/ionic conductivity of cracked NCNT and robust mechanical stability of geometrically confined Fe3N nanoparticles contribute to the excellent redox activities, stabilized solid-electrolyte-interphase film and cycling durability of Fe3N@NCNT. © 2024 Elsevier Ltd

Keyword :

Anodes Anodes Carbon nanotubes Carbon nanotubes Growth mechanism Growth mechanism Iron nitrides Iron nitrides Lithium-ion batteries Lithium-ion batteries

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GB/T 7714 Chen, M. , Liu, F.-M. , Zhao, M.-Y. et al. Controllable synthesis and growth mechanism of cracked cowpea-like NCNT encapsulated with Fe3N nanoparticles for high-performance anode material in lithium-ion batteries [J]. | Carbon , 2024 , 230 .
MLA Chen, M. et al. "Controllable synthesis and growth mechanism of cracked cowpea-like NCNT encapsulated with Fe3N nanoparticles for high-performance anode material in lithium-ion batteries" . | Carbon 230 (2024) .
APA Chen, M. , Liu, F.-M. , Zhao, M.-Y. , Qian, X. , Yuan, Z.-Y. , Wan, R. et al. Controllable synthesis and growth mechanism of cracked cowpea-like NCNT encapsulated with Fe3N nanoparticles for high-performance anode material in lithium-ion batteries . | Carbon , 2024 , 230 .
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Ni-CoS2@MoS2 hollow nanorod array in-situ synthesized on Ti foil as Pt-free self-supporting electrode for efficient wide-pH hydrogen evolution SCIE
期刊论文 | 2024 , 655 | APPLIED SURFACE SCIENCE
WoS CC Cited Count: 5
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Abstract :

Green energy such as hydrogen energy has broad development prospects in promoting the adjustment of energy structure due to its advantages in cleanliness and efficiency. Hydrogen evolution reaction (HER) for water splitting can be used as a simple and effective avenue for hydrogen production. Platinum (Pt), a noble metal, has shown excellent catalytic performance as a conventional cathode catalyst for HER, but its high price has severely hindered its commercial application. Herein, a hollow nanorod array based Pt-free self-supporting electrode with a unique structure was developed for efficient hydrogen evolution reactions. This electrode was composed of a hollow ordered Ni-CoS2@MoS2 array as the main catalyst and a highly conductive Ti foil as a conducting substrate. In the synthesis process, ammonium tetrathiomolybdate was used as a multifunctional vulcanizing agent. Thanks to the unique structure of the hollow nanorods, the active ingredient was adequately revealed, making it possible to improve catalytic activity. This unique catalyst exhibited excellent HER performance at different pH values. Ni-CoS2@MoS2/Ti electrode exhibited high HER performance in alkaline, acidic, and neutral media, with overpotentials of 153, 192, and 196 mV at 10 mA cm -2 and Tafel slopes of 65.8, 67.8, and 93.3 mV dec-1, respectively.

Keyword :

Active cite Active cite Hollow nanorod array Hollow nanorod array Hydrogen evolution Hydrogen evolution Water splitting Water splitting Wide pH range Wide pH range

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GB/T 7714 Qian, Xing , Wu, Jiashuo , Yang, Yajie et al. Ni-CoS2@MoS2 hollow nanorod array in-situ synthesized on Ti foil as Pt-free self-supporting electrode for efficient wide-pH hydrogen evolution [J]. | APPLIED SURFACE SCIENCE , 2024 , 655 .
MLA Qian, Xing et al. "Ni-CoS2@MoS2 hollow nanorod array in-situ synthesized on Ti foil as Pt-free self-supporting electrode for efficient wide-pH hydrogen evolution" . | APPLIED SURFACE SCIENCE 655 (2024) .
APA Qian, Xing , Wu, Jiashuo , Yang, Yajie , Zhang, Wanting , Zheng, Han , Xia, Juan et al. Ni-CoS2@MoS2 hollow nanorod array in-situ synthesized on Ti foil as Pt-free self-supporting electrode for efficient wide-pH hydrogen evolution . | APPLIED SURFACE SCIENCE , 2024 , 655 .
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Low-temperature metal-catalyzed synthesis of encapsulated metal oxide nanoparticles in nitrogen-doped carbon nanotubes from carbon nitride as anodic materials of high-performance lithium-ion batteries SCIE
期刊论文 | 2023 , 47 (7) , 3215-3221 | NEW JOURNAL OF CHEMISTRY
WoS CC Cited Count: 6
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Metal oxides have been considered as a promising anode material for lithium ion batteries (LIBs) due to their high theoretical capacities, low cost, natural abundance and environmental friendliness. However, the severe volume expansion upon cycling and poor conductivity limit their cycling stability and rate capability. To address this issue, Co3O4 and NiO nanoparticles encapsulated at the endpoints of nitrogen-doped carbon nanotube (NCNT) hybrids are designed and prepared by a metal catalyzed graphitization-nitridization driven tip-growth process and the subsequent oxidation in air, using (carbon nitride) C3N4 as a new solid-state carbon and nitrogen source. When used as an anode material for LIBs, the representative Co3O4@NCNT hybrid exhibits a high capacity of 1002 mA h g(-1) at 100 mA g(-1), an excellent rate capability of 673 mA h g(-1) at 5.0 A g(-1) and remarkable cycling stability of 837 mA h g(-1) after 800 cycles at 1 A g(-1), which are much superior to those of the Co3O4/CB control sample. The outstanding electrochemical performances of MxOy@NCNTs are due to their unique nanoarchitecture, which offers a porous conductive matrix for effective electron-ion transport and forms carbon nanocap confined MxOy nanoparticles as well as stress buffer nanocavities for robust structural stability during lithiation/delithiation processes. The results may pave a way for the rational structural design of high-performance metal oxide-based anode materials for next-generation LIBs.

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GB/T 7714 Chen, Ming , Liu, Feng-Ming , Chen, Shan-Shuai et al. Low-temperature metal-catalyzed synthesis of encapsulated metal oxide nanoparticles in nitrogen-doped carbon nanotubes from carbon nitride as anodic materials of high-performance lithium-ion batteries [J]. | NEW JOURNAL OF CHEMISTRY , 2023 , 47 (7) : 3215-3221 .
MLA Chen, Ming et al. "Low-temperature metal-catalyzed synthesis of encapsulated metal oxide nanoparticles in nitrogen-doped carbon nanotubes from carbon nitride as anodic materials of high-performance lithium-ion batteries" . | NEW JOURNAL OF CHEMISTRY 47 . 7 (2023) : 3215-3221 .
APA Chen, Ming , Liu, Feng-Ming , Chen, Shan-Shuai , Qian, Xing , Zhao, Yi-Jing , Sun, Yan et al. Low-temperature metal-catalyzed synthesis of encapsulated metal oxide nanoparticles in nitrogen-doped carbon nanotubes from carbon nitride as anodic materials of high-performance lithium-ion batteries . | NEW JOURNAL OF CHEMISTRY , 2023 , 47 (7) , 3215-3221 .
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MOFs-derived bifunctional Ni-Fe-Mo sulfide electrode catalysts with hollow bipyramidal structures for efficient photovoltaics and hydrogen generation SCIE
期刊论文 | 2023 , 437 | ELECTROCHIMICA ACTA
WoS CC Cited Count: 7
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Abstract :

The effective improvements in structure and composition are critical to the performances of inexpensive elec-trocatalysts based on transition metal chalcogenides (TMCs), especially in dye-sensitized solar cell (DSSC) and hydrogen evolution reaction (HER), which will be an ongoing challenge. Herein, a novel method of forming Ni-Fe-Mo sulfide composite electrocatalyst (denoted as Ni-Fe-MoSx) by adding molybdenum element when modi-fying the active sites on the surface of Ni-Fe layered double hydroxide (Ni-Fe LDH) was proposed and studied. Beginning with MIL-88A (Fe), Ni-Fe LDH was prepared by the hydrolysis of nickel and iron ions in alkaline solution, and then vulcanized by ammonium tetrathiomolybdate to synthesize Ni-Fe-MoSx electrocatalyst with hollow bipyramidal structure and rich active sites on the modified surface. Benefiting from the advantages of hollow construction and the enhanced intrinsic activity of more active sites, Ni-Fe-MoSx electrode delivered an outstanding power conversion efficiency (PCE) of 9.37% in DSSC. Accompanying with a low onset potential of 30.4 mV, its stability in acid HER could maintain well over long periods of time. The successful implementation of the scheme is expected to provide a novel avenue for synthesizing bifunctional electrocatalysts based on TMCs.

Keyword :

Bifunctional electrocatalyst Bifunctional electrocatalyst Dye-sensitized solar cell Dye-sensitized solar cell Hollow bipyramidal structure Hollow bipyramidal structure Hydrogen evolution reaction Hydrogen evolution reaction Ni-Fe-MoSx Ni-Fe-MoSx

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GB/T 7714 Qian, Xing , Chen, Wenbin , Yang, Jiahui et al. MOFs-derived bifunctional Ni-Fe-Mo sulfide electrode catalysts with hollow bipyramidal structures for efficient photovoltaics and hydrogen generation [J]. | ELECTROCHIMICA ACTA , 2023 , 437 .
MLA Qian, Xing et al. "MOFs-derived bifunctional Ni-Fe-Mo sulfide electrode catalysts with hollow bipyramidal structures for efficient photovoltaics and hydrogen generation" . | ELECTROCHIMICA ACTA 437 (2023) .
APA Qian, Xing , Chen, Wenbin , Yang, Jiahui , Chen, Siyan , Guan, Guoxiang . MOFs-derived bifunctional Ni-Fe-Mo sulfide electrode catalysts with hollow bipyramidal structures for efficient photovoltaics and hydrogen generation . | ELECTROCHIMICA ACTA , 2023 , 437 .
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N,S-codoped carbon encapsulated Co3S4@NiS/Cu2S hierarchical yolk-shell nanopolyhedron as bifunctional catalyst for efficient photovoltaics and alkaline hydrogen evolution SCIE
期刊论文 | 2023 , 40 | SURFACES AND INTERFACES
WoS CC Cited Count: 2
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The yolk-shell structure electrocatalysts formed by polymetallic sulfides hold great promise in a variety of energy conversion/storage fields. Herein, the nitrogen/sulfur codoped porous carbon encapsulated Co3S4@NiS/Cu2S nanopolyhedrons (NSC-Co3S4@NiS/Cu2S) with hierarchical yolk-shell structures were successfully designed and synthesized by a facile one-step high-temperature degradation of zeolite imidazolate framework-67 (ZIF-67) wrapped with metal-doped trithiocyanuric acid (TCA-M). Trithiocyanuric acid played a dual role, not only providing nitrogen, sulfur, and carbon sources, but also playing a role in the sulfurization of metal elements. It is worth noting that, due to the higher specific surface area, unique morphology, multi-element synergies, and more favorable chemical composition, the synthesized samples possessed outstanding bifunctional electro-catalytic performance for dye-sensitized solar cells (DSSCs) and hydrogen evolution reactions (HERs). Experi-mental results showed that NSC-Co3S4@NiS/Cu2S electrode has a high photoelectric conversion efficiency (9.57%) in DSSCs. In addition, NSC-Co3S4@NiS/Cu2S electrode also showed a lower initial overpotential (65.1 mV) and Tafel slope (49.7 mV dec-1) in the alkaline HERs test. The present approach has proposed a new syn-thetic idea of hierarchical yolk-shell metal sulfide in different new energy catalysis fields.

Keyword :

Bifunctional catalyst Bifunctional catalyst Cu2S Cu2S Dye-sensitized solar cell Dye-sensitized solar cell Hydrogen evolution Hydrogen evolution Metal-organic framework Metal-organic framework Yolk-shell nanopolyhedron Yolk-shell nanopolyhedron

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GB/T 7714 Qian, Xing , Chen, Wenbin , Zheng, Han et al. N,S-codoped carbon encapsulated Co3S4@NiS/Cu2S hierarchical yolk-shell nanopolyhedron as bifunctional catalyst for efficient photovoltaics and alkaline hydrogen evolution [J]. | SURFACES AND INTERFACES , 2023 , 40 .
MLA Qian, Xing et al. "N,S-codoped carbon encapsulated Co3S4@NiS/Cu2S hierarchical yolk-shell nanopolyhedron as bifunctional catalyst for efficient photovoltaics and alkaline hydrogen evolution" . | SURFACES AND INTERFACES 40 (2023) .
APA Qian, Xing , Chen, Wenbin , Zheng, Han , Liu, Linchun , Wan, Chao , Xia, Juan et al. N,S-codoped carbon encapsulated Co3S4@NiS/Cu2S hierarchical yolk-shell nanopolyhedron as bifunctional catalyst for efficient photovoltaics and alkaline hydrogen evolution . | SURFACES AND INTERFACES , 2023 , 40 .
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Ni-CoS2/WS2/MoS2 hollow cuboids as noble metal-free bifunctional catalysts for highly efficient photovoltaics and electrochemical hydrogen production SCIE
期刊论文 | 2023 , 211 , 459-469 | RENEWABLE ENERGY
WoS CC Cited Count: 8
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Transition metal compounds, especially NiS2, CoS2, WS2, and MoS2 as noble metal-free catalyst materials, are widely applied to replace Pt in the fields of dye-sensitized solar cells (DSSCs) and hydrogen evolution reactions (HER). Meanwhile, hollow structures have large specific surface area and their large void spaces can also effectively reduce ion migration resistance and diffusion length. In this work, Ni-CoS2/WS2 and Ni-CoS2/MoS2 hollow cuboids have been successfully synthesized and applied as promising bifunctional electrocatalysts in highefficiency DSSCs and HERs. In detail, nickel-cobalt hydroxide cuboids were prepared and served as selfsacrificing templates to react with (NH4)2WS(4) or (NH4)(2)MoS4 at room temperature, and then mixed with sulfur powder for annealing treatment. Besides, Ni-CoS2 hollow cuboids were synthesized as a reference. Profiting from the stable hollow structure, large specific surface area, abundant effective active sites exposed by WS2, and synergistic effect of multiple elements, Ni-CoS2/WS2 hollow cuboids manifested a preeminent performance. Compared with Pt (8.06%), the conversion efficiency of Ni-CoS2/WS2 hollow cuboids had reached 9.41% as counter electrode for DSSCs. As for HER, it exhibited the lowest overpotential of 72.4 mV@10 mA cm-2 and had the minimum Tafel slope (56.1 mV dec(-1)) compared with Ni-CoS2/MoS2 and Ni-CoS2.

Keyword :

Bifunctional electrocatalyst Bifunctional electrocatalyst Counter electrode Counter electrode Dye-sensitized solar cell Dye-sensitized solar cell Hydrogen evolution reaction Hydrogen evolution reaction Ni-CoS2 Ni-CoS2 Transition metal compound Transition metal compound WS 2 hollow cuboid WS 2 hollow cuboid

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GB/T 7714 Qian, Xing , Chen, Wenbin , Huang, Jie et al. Ni-CoS2/WS2/MoS2 hollow cuboids as noble metal-free bifunctional catalysts for highly efficient photovoltaics and electrochemical hydrogen production [J]. | RENEWABLE ENERGY , 2023 , 211 : 459-469 .
MLA Qian, Xing et al. "Ni-CoS2/WS2/MoS2 hollow cuboids as noble metal-free bifunctional catalysts for highly efficient photovoltaics and electrochemical hydrogen production" . | RENEWABLE ENERGY 211 (2023) : 459-469 .
APA Qian, Xing , Chen, Wenbin , Huang, Jie , Wu, Jianhua , Wu, Jiashuo . Ni-CoS2/WS2/MoS2 hollow cuboids as noble metal-free bifunctional catalysts for highly efficient photovoltaics and electrochemical hydrogen production . | RENEWABLE ENERGY , 2023 , 211 , 459-469 .
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