Carbon quantum dots (CQDs) modified α-Fe2O3/BiVO4 heterojunction photoanode for enhancing photoelectrochemical water splitting - Details

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The　design　of　photoanode　materials　to　achieve　efficient　water　splitting　is　a　current　research　hotspot　in　photoelectrochemical　(PEC).　In　this　work,　we　designed　and　prepared　an　α-Fe2O3/BiVO4　heterostructure　modified　by　carbon　quantum　dots　((α-Fe2O3/BiVO4/CQDs))　as　the　photoanode.　The　modification　of　CQDs　can　broaden　the　sunlight　absorption　ability　and　dramatically　enhance　the　water　oxidation　kinetics　of　α-Fe2O3/BiVO4/CQDs.　The　optimized　photoanode　demonstrated　a　photocurrent　density　of　1.32　mA·cm−2　at　1.23　V　vs.　RHE,　which　is　2.2　times　than　pristine　α-Fe2O3　(0.6　mA·cm−2)　photoanode.　The　IPCE　value　above　29.4　%　at　400　nm,　and　the　onset　potential　is　negatively　shifted　by　243　mV　for　α-Fe2O3/BiVO4/CQDs.　The　improved　performance　is　mainly　due　to　the　α-Fe2O3/BiVO4　heterojunction　to　achieve　effective　separation　of　photogenerated　carriers　in　the　bulk　phase　and　CQDs　to　improve　light　utilisation　and　OER　kinetics　of　the　photoanode.　©　2024

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BiVO4 Carbon quantum dots Heterojunction PEC α-Fe2O3

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[ 1 ] [Jia S.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
[ 2 ] [Liu Z.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
[ 3 ] [Gao Y.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
[ 4 ] [Zhang R.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
[ 5 ] [Zhu R.]School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
[ 6 ] [Gao S.]Xiamen University, Xiamen, 361000, China
[ 7 ] [Guan P.]Fuzhou University, Fuzhou, 350108, China
[ 8 ] [Geng X.]Xiamen University, Xiamen, 361000, China
[ 9 ] [Tian K.]Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
[ 10 ] [Tian K.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China
[ 11 ] [Bai S.]State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing, 100029, China

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Carbon quantum dots (CQDs) modified α-Fe 2 O 3 /BiVO 4 heterojunction photoanode for enhancing photoelectrochemical water splitting
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Source ：

Electrochimica Acta

ISSN： 0013-4686

Year： 2025

Volume： 514

5 . 5 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 1

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