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学者姓名：郑云
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Abstract ：
High-temperature proton exchange membrane fuel cells (HT-PEMFCs) show broad application perspectives due to their faster reaction kinetics and tolerance to fuel/gas impurities as well as the easy water/heat managements. However, the catalysts and subsequent membrane electrode assemblies (MEAs) are still suffering from performance degradation, which severely restricts HT-PEMFCs' large-scale practical application. To overcome the challenges, developing high-performance catalysts and MEAs with advanced materials and optimized structures to achieve stable and efficient operation of HT-PEMFCs is necessary. To facilitate the research and development of HT-PEMFCs, a comprehensive overview of the latest developments in the design of active and stable catalysts and durable MEAs is presented in this paper. This review systematically summarizes the degradation mechanisms of catalysts, and corresponding mitigation strategies for improving the stability of catalysts and MEAs, aiming to effectively developing high-performance and durable HT-PEMFCs. Furthermore, the main challenges are analyzed and the future research directions for overcoming the challenges are also proposed for developing highactive and stable catalysts and MEAs used in HT-PEMFCs toward practical applications.
Keyword ：
Catalysts Catalysts Degradation mechanisms Degradation mechanisms High-temperature proton exchange membrane fuel cells High-temperature proton exchange membrane fuel cells Membrane electrode assemblies Membrane electrode assemblies Mitigation strategies Mitigation strategies
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| GB/T 7714 | Xu, Chenhui , Wang, Shufan , Zheng, Yun et al. Performance enhancement from catalysts to membrane electrode assemblies for high-temperature proton exchange membrane fuel cells [J]. | NANO ENERGY , 2025 , 139 . |
| MLA | Xu, Chenhui et al. "Performance enhancement from catalysts to membrane electrode assemblies for high-temperature proton exchange membrane fuel cells" . | NANO ENERGY 139 (2025) . |
| APA | Xu, Chenhui , Wang, Shufan , Zheng, Yun , Liu, Haishan , Li, Lingfei , Zhuang, Zewen et al. Performance enhancement from catalysts to membrane electrode assemblies for high-temperature proton exchange membrane fuel cells . | NANO ENERGY , 2025 , 139 . |
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MXenes, a unique class of 2D transition metal carbides, have gained attention for gas sensing applications due to their distinctive properties. Since the synthesis of Ti3C2Tx MXene in 2011, significant progress has been made in using MXenes as chemiresistive sensors. Their layered structure, abundant surface groups, hydrophilicity, tunable conductivity, and excellent thermal properties make MXenes ideal for low-power, flexible, room temperature gas sensors, fostering scalable and reproducible applications in portable devices. This review evaluates the latest advancements in MXene-based gas sensors, beginning with an overview of the elemental compositions, structures, and typical fabrication process of MXenes. We subsequently examine their applications in gas sensing domains, evaluating the proposed mechanisms for detecting common volatile organic compounds such as acetone, formaldehyde, ethanol, ammonia, and nitrogen oxides. To set this apart from similar reviews, our focus centered on the mechanistic interactions between MXene sensing materials and analytes (particularly for chemiresistive gas sensors), leveraging the distinct functionalities of MXene chemistries, which can be finely tuned for specific applications. Ultimately, we examine the current limitations and prospective research avenues concerning the utilization of MXenes in environmental and biomedical applications.
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| GB/T 7714 | Qian, Lanting , Rahmati, Farnood , Li, Fengchao et al. Recent advances in 2D MXene-based heterostructures for gas sensing: mechanisms and applications in environmental and biomedical fields [J]. | NANOSCALE , 2025 , 17 (15) : 8975-8998 . |
| MLA | Qian, Lanting et al. "Recent advances in 2D MXene-based heterostructures for gas sensing: mechanisms and applications in environmental and biomedical fields" . | NANOSCALE 17 . 15 (2025) : 8975-8998 . |
| APA | Qian, Lanting , Rahmati, Farnood , Li, Fengchao , Zhang, Tianzhu , Wang, Tao , Zhang, Haoze et al. Recent advances in 2D MXene-based heterostructures for gas sensing: mechanisms and applications in environmental and biomedical fields . | NANOSCALE , 2025 , 17 (15) , 8975-8998 . |
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Introducing advanced conductive nanoparticles to combine with metal-organic frameworks (MOFs) as electrode is emergingly regarded as a practical and efficient approach to improve the capacitive performance of super- capacitors. Herein, a new MOF (ZrNi-UiO-66, Nickel-zirconium 1,4-dicarboxybenzene) is designed to combine with carbon quantum dots (CQDs) to form a composite electrode with high specific capacitance, in which the charge regulation is performed to facilitate the electronic conduction and transfer. Such constructed electrode delivers an enhanced electronic conductivity and an improved specific capacitance of 2468.75 F g- 1 @ 1 A g- 1 , which is four times of the contrast sample. Meanwhile, the assembled hybrid supercapacitor exhibits an increased energy density and power density, as well as a sustainable stability after 10,000 cycles with a retention rate of 91.6 %. Basing on the study of advanced characterizations and density functional theory (DFT) simulation, the mechanism of significantly improved specific capacitance can be elaborated as the promote electronic conduction caused from narrowed band gap from 3.9 eV or 0.41 eV-0.23 eV, and the increased charge accumulation at the Ni sites in designed MOFs. This work provides new insights for the design and construction of potential energy storage materials based on MOFs and/or advanced carbon-based materials.
Keyword ：
Carbon quantum dots (CQDs) Carbon quantum dots (CQDs) Charge regulation Charge regulation Specific capacitance Specific capacitance Supercapacitor Supercapacitor ZrNi-UiO-66 ZrNi-UiO-66
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| GB/T 7714 | Xie, Yujuan , Han, Jinghua , Li, Fengchao et al. Charge regulation for advanced electrode combining ZrNi-UiO-66 and carbon quantum dots towards high specific capacitance [J]. | JOURNAL OF POWER SOURCES , 2025 , 629 . |
| MLA | Xie, Yujuan et al. "Charge regulation for advanced electrode combining ZrNi-UiO-66 and carbon quantum dots towards high specific capacitance" . | JOURNAL OF POWER SOURCES 629 (2025) . |
| APA | Xie, Yujuan , Han, Jinghua , Li, Fengchao , Li, Lingfei , Li, Zhenghao , Li, Qian et al. Charge regulation for advanced electrode combining ZrNi-UiO-66 and carbon quantum dots towards high specific capacitance . | JOURNAL OF POWER SOURCES , 2025 , 629 . |
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Single-atomic/cluster metal-based electrocatalysts (M-N-C) is one of the most promising non-noble metal catalysts for the oxygen reduction reaction (ORR), but their practical application is severely hindered by insufficient activity and durability. Herein, charge regulation through rare earth metal oxides (REMOs) for single-atomic/cluster metal based electrocatalysts is proposed for boosting ORR, in which the Co-based catalyst is taken as a representative considering its typicality and universality, and CeO2 is selected as representative after systematic computational screening from more than 10 types of REMOs. As a result, a novel REMO-tailored M-N-C electrocatalyst (REMO-Co-N-C) has been successfully achieved, which demonstrates a remarkably increased activity and superior durability, namely a half-wave potential (E₁/₂) of 0.90 V and only a loss of 8 mV (E₁/₂) after 10,000 cycles. Moreover, in-situ experiments and matched theoretical simulations come together organically to clearly and directly reveal the origin and catalytic behavior of the proposed electrocatalysts. Namely the charge regulation through REMO for M-N-C can effectively modify the electronic structure of the M sites, accelerate the reaction rate, and enhance OH* desorption. This work offers a new insight for promoting M-N-C catalysts through REMO tailoring, that beyond the conventional use of d-block and p-block elements. © 2025 Elsevier B.V.
Keyword ：
Cerium oxide Cerium oxide Electrolysis Electrolysis Electrolytic reduction Electrolytic reduction
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| GB/T 7714 | Wang, Shufan , Li, Lingfei , Zheng, Yun et al. Charge regulation through rare earth metal oxides for single-atomic/cluster Co-based electrocatalysts towards boosting oxygen reduction reaction [J]. | Applied Catalysis B: Environmental , 2025 , 377 . |
| MLA | Wang, Shufan et al. "Charge regulation through rare earth metal oxides for single-atomic/cluster Co-based electrocatalysts towards boosting oxygen reduction reaction" . | Applied Catalysis B: Environmental 377 (2025) . |
| APA | Wang, Shufan , Li, Lingfei , Zheng, Yun , Xu, Chenhui , Zhuang, Zewen , Sun, Kaian et al. Charge regulation through rare earth metal oxides for single-atomic/cluster Co-based electrocatalysts towards boosting oxygen reduction reaction . | Applied Catalysis B: Environmental , 2025 , 377 . |
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| GB/T 7714 | Zheng, Yun , Zhang, Gaixia , Deng, Sixu et al. Special issue on electrochemical energy storage and conversion [J]. | FRONTIERS IN ENERGY , 2024 , 18 (2) : 125-127 . |
| MLA | Zheng, Yun et al. "Special issue on electrochemical energy storage and conversion" . | FRONTIERS IN ENERGY 18 . 2 (2024) : 125-127 . |
| APA | Zheng, Yun , Zhang, Gaixia , Deng, Sixu , Zhang, Jiujun . Special issue on electrochemical energy storage and conversion . | FRONTIERS IN ENERGY , 2024 , 18 (2) , 125-127 . |
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The use of two-dimensional (2D) layered metal-organic frameworks (MOFs) as self-sacrificial templates has been proven to be a successful method to create high-efficiency Selenium (Se)-containing electrocatalysts for overall water splitting. Herein, two strategies are then utilized to introduce Se element into the Co-Fe MOF, one being the etching of as-prepared MOF by SeO2 solution, and the other, the replacing of SCN- with SeCN- as the construction unit. The electrochemical activity of the pristine 2D MOF and their calcinated derivatives for catalyzing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is evaluated and further discussed. It is found that the effect of introducing Se on improving electrochemical catalytic activity is significant for the HER process. Specifically, the calcinated derivative in the replacing method exhibits an overpotential of 235 mV for HER and 270 mV for OER at a current density of 10 mA/cm2. For comparing the two methods of introducing Se element into MOF, similar electrocatalytic activity can be achieved on the their calcinated derivatives. The high electrochemical performance of 2D CoFe-MOF derivatives may be resulted from the unique 2D hierarchical porous structure and strong synergistic effect between different components in the material.
Keyword ：
2D MOF 2D MOF hydrogen evolution reaction (HER) hydrogen evolution reaction (HER) oxygen evolution reaction (OER) oxygen evolution reaction (OER) selenium (Se)-containing materials selenium (Se)-containing materials
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| GB/T 7714 | Shang, Zhao-ting , Li, Tang-ming , Hu, Bing-qian et al. Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting [J]. | FRONTIERS IN ENERGY , 2024 , 18 (3) : 378-389 . |
| MLA | Shang, Zhao-ting et al. "Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting" . | FRONTIERS IN ENERGY 18 . 3 (2024) : 378-389 . |
| APA | Shang, Zhao-ting , Li, Tang-ming , Hu, Bing-qian , Liu, Min , Lu, Wang-ting , Yu, Fan et al. Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting . | FRONTIERS IN ENERGY , 2024 , 18 (3) , 378-389 . |
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The electrochemistry of cathode materials for sodium-ion batteries differs significantly from lithium-ion batteries and offers distinct advantages. Overall, the progress of commercializing sodium-ion batteries is currently impeded by the inherent inefficiencies exhibited by these cathode materials, which include insufficient conductivity, slow kinetics, and substantial volume changes throughout the process of intercalation and deintercalation cycles. Consequently, numerous methodologies have been utilized to tackle these challenges, encompassing structural modulation, surface modification, and elemental doping. This paper aims to highlight fundamental principles and strategies for the development of sodium transition metal oxide cathodes. Specifically, it emphasizes the role of various elemental doping techniques in initiating anionic redox reactions, improving cathode stability, and enhancing the operational voltage of these cathodes, aiming to provide readers with novel perspectives on the design of sodium metal oxide cathodes through the doping approach, as well as address the current obstacles that can be overcome/alleviated through these dopant strategies.
Keyword ：
doping strategy doping strategy sodium-ion batteries sodium-ion batteries transition metal cathode transition metal cathode
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| GB/T 7714 | Zhang, Zhijing , Zhang, Haoze , Wu, Yaopeng et al. Advances in doping strategies for sodium transition metal oxides cathodes: A review [J]. | FRONTIERS IN ENERGY , 2024 . |
| MLA | Zhang, Zhijing et al. "Advances in doping strategies for sodium transition metal oxides cathodes: A review" . | FRONTIERS IN ENERGY (2024) . |
| APA | Zhang, Zhijing , Zhang, Haoze , Wu, Yaopeng , Yan, Wei , Zhang, Jiujun , Zheng, Yun et al. Advances in doping strategies for sodium transition metal oxides cathodes: A review . | FRONTIERS IN ENERGY , 2024 . |
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Electrocatalytic oxidation as a promising route to produce value-added products from biomass-derived organics has received increasing attention in recent years. However, the efficient conversion of concentrated feedstock solutions with high selectivity and Faradaic efficiency (FE) remains challenging. Herein, we report a cation-defective Ni-based electrocatalyst derived from the surface reconstruction of the NiCo Prussian blue analogue (NiCo PBA) in alkaline media for the efficient oxidation of biomass-derived organics in a high concentration solution. Taking 5-hydroxymethylfurfural (HMF) as an example, the NiCo PBA can deliver a satisfactory catalytic performance in terms of high HMF conversion (97%), selectivity to 2,5-furandicarboxylic acid (98%), and FE (100%), even at a concentration as high as 100 mM. Theoretical calculations suggest that the cation defects not only promote the fast conversion of Ni(OH)(2) to electrochemically active NiOOH under anodic potential but also enhance the adsorption of HMF onto the active sites and accelerate the spontaneous chemical oxidation. This study provides deep insights into the structural evolution of PBA-based catalysts and reveals the pivotal factor that affects the performance of electrocatalytic oxidation, paving the way to further develop advanced electrocatalysts for efficient oxidation reactions with a high concentration.
Keyword ：
biomass upgrade biomass upgrade cation defects cation defects electrooxidation electrooxidation operandoRaman spectroscopies operandoRaman spectroscopies Prussian blue analogues catalysts Prussian blue analogues catalysts
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| GB/T 7714 | Zhang, Hongwei , Yang, Qin , Luo, Shuting et al. On the Activity and Selectivity of 5-Hydroxymethylfurfural Electrocatalytic Oxidation over Cation-Defective Nickel Hydroxides [J]. | ACS CATALYSIS , 2024 , 14 (12) : 9565-9574 . |
| MLA | Zhang, Hongwei et al. "On the Activity and Selectivity of 5-Hydroxymethylfurfural Electrocatalytic Oxidation over Cation-Defective Nickel Hydroxides" . | ACS CATALYSIS 14 . 12 (2024) : 9565-9574 . |
| APA | Zhang, Hongwei , Yang, Qin , Luo, Shuting , Liu, Zhichen , Huang, Jinming , Zheng, Yun et al. On the Activity and Selectivity of 5-Hydroxymethylfurfural Electrocatalytic Oxidation over Cation-Defective Nickel Hydroxides . | ACS CATALYSIS , 2024 , 14 (12) , 9565-9574 . |
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Hydrogen energy serves as an ideal alternative energy carrier to fossil fuels in the future clean energy system. The hydrogen evolution reaction (HER) occurring at the cathode of water electrocatalysis has been considered as a promising approach to produce hydrogen over the past decades due to zero carbon emission. To gain a deep insight into the advanced electrocatalyst, herein, we provide a comprehensive review with an emphasis on the recent state-of-the-art advances of HER electrocatalysts in view of controlling their local electronic structure, creating defect nanostructures, exposing active sites, altering d band center, and constructing heterogeneous structure. Initially, we start with a brief introduction of the fundamental electrocatalytic mechanisms and the critical electrochemical parameters for evaluating HER. Then, we systemically discuss three representative classes of electrocatalysts, comprised of highly active noble-metal including single atom, nanoparticles, and clusters, earth-abundant transition metal such as transition metal sulfides, phosphides, carbides, nitrides, and oxides, and metal-free functional nanomaterials involving different dimensions of carbonaceous nanomaterials, boron nitrogen, and phosphorous non-carbonaceous nanomaterials by adjusting their tunable electronic structures and architectures/morphologies with a particular emphasis on the structure-function relationships. Finally, we point out the current challenges and opportunities in view of achieving highly active and stable electrocatalysts towards practical applications.
Keyword ：
Hydrogen evolution reaction Hydrogen evolution reaction Metal-free electrocatalysts Metal-free electrocatalysts Noble metal-based electrocatalysts Noble metal-based electrocatalysts Transitional metal electrocatalysts Transitional metal electrocatalysts
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| GB/T 7714 | Wang, Chunxia , Guo, Wenxuan , Chen, Tianle et al. Advanced noble-metal/transition-metal/metal-free electrocatalysts for hydrogen evolution reaction in water-electrolysis for hydrogen production [J]. | COORDINATION CHEMISTRY REVIEWS , 2024 , 514 . |
| MLA | Wang, Chunxia et al. "Advanced noble-metal/transition-metal/metal-free electrocatalysts for hydrogen evolution reaction in water-electrolysis for hydrogen production" . | COORDINATION CHEMISTRY REVIEWS 514 (2024) . |
| APA | Wang, Chunxia , Guo, Wenxuan , Chen, Tianle , Lu, Wenyi , Song, Zhaoyi , Yan, Chengcheng et al. Advanced noble-metal/transition-metal/metal-free electrocatalysts for hydrogen evolution reaction in water-electrolysis for hydrogen production . | COORDINATION CHEMISTRY REVIEWS , 2024 , 514 . |
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| GB/T 7714 | Zheng, Yun , Yu, Bo , Fu, Xiaogang et al. Special issue on electrochemical conversion and utilization of hydrogen energy [J]. | FRONTIERS IN ENERGY , 2024 , 18 (3) : 263-264 . |
| MLA | Zheng, Yun et al. "Special issue on electrochemical conversion and utilization of hydrogen energy" . | FRONTIERS IN ENERGY 18 . 3 (2024) : 263-264 . |
| APA | Zheng, Yun , Yu, Bo , Fu, Xiaogang , Zhang, Jiujun . Special issue on electrochemical conversion and utilization of hydrogen energy . | FRONTIERS IN ENERGY , 2024 , 18 (3) , 263-264 . |
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