A novel α-Fe2O3 photoanode with multilayered In2O3/Co–Mn nanostructure for efficient photoelectrochemical water splitting - Details

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Abstract：

Hematite　(α-Fe2O3)　is　considered　one　of　the　most　promising　materials　for　PEC　water　splitting　under　solar　light.　However,　the　drawbacks　of　lower　charge　transfer　efficiency　and　slow　oxygen　evolution　reaction　(OER)　kinetics　seriously　limited　the　practical　application　of　α-Fe2O3　photoanodes.　In　this　work,　a　multilayer　structure　modified　α-Fe2O3　photoanode　is　proposed.　Firstly,　the　In2O3　nanolayers　were　loaded　onto　the　surface　of　α-Fe2O3　nanorods,　significantly　increasing　the　photoelectrochemical　(PEC)　water　oxidation　activity.　The　heterojunction　form　by　the　In2O3　passivation　layer　with　α-Fe2O3　effectively　promotes　charge　separation.　Next,　an　electrodeposition　method　deposited　a　nanosheet　combining　ultrathin　non-crystalline　Co(OH)x　and　Mn3O4　nanocrystals　(Co–Mn)　on　the　α-Fe2O3　thin　film.　As　an　efficient　co-catalyst,　the　Co–Mn　nanosheets　assisted　the　performance　of　α-Fe2O3　PEC　water　oxidation.　The　optimized　α-Fe2O3–In2O3–Co(OH)x-Mn3O4　photoanode　produces　a　high　photocurrent　density　of　6.5　mA/cm2　at　1.23　V　(vs.　RHE),　a　maximum　IPCE　of　57.9%　at　400　nm　can　reach.　©　2023

Keyword：

Co–Mn nanosheet coating In2O3 nanolayers Photoelectrochemical water splitting α-Fe2O3 nanorod arrays

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[ 1 ] [Ji M.-H.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 2 ] [Ji M.-H.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 3 ] [Ji M.-H.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 4 ] [Chen Y.-X.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 5 ] [Chen Y.-X.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 6 ] [Chen Y.-X.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 7 ] [Chen Y.-X.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
[ 8 ] [Chen Y.-X.]College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350108, China
[ 9 ] [Chen R.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 10 ] [Chen R.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 11 ] [Li K.-X.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 12 ] [Li K.-X.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 13 ] [Li K.-X.]College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350108, China
[ 14 ] [Zhao H.-P.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 15 ] [Zhao H.-P.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 16 ] [Shi H.-Y.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 17 ] [Shi H.-Y.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 18 ] [Wang H.-L.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 19 ] [Wang H.-L.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 20 ] [Jiang X.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 21 ] [Jiang X.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 22 ] [Lu C.-Z.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 23 ] [Lu C.-Z.]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 24 ] [Lu C.-Z.]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361021, China
[ 25 ] [Lu C.-Z.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
[ 26 ] [Lu C.-Z.]College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350108, China

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Source ：

International Journal of Hydrogen Energy

ISSN： 0360-3199

Year： 2023

Volume： 51

Page： 66-77

8 . 1

JCR@2023

8 . 1 0 0

JCR@2023

JCR Journal Grade：1

CAS Journal Grade：2

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ESI Highly Cited Papers on the List： 0 Unfold All

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