Electric-field-assisted proton coupling enhanced oxygen evolution reaction.

Autor: Pan X; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China.; Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford, OX1 3QR, UK., Yan M; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China. ymy@whut.edu.cn., Liu Q; School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China., Zhou X; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China., Liao X; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China., Sun C; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China., Zhu J; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China., McAleese C; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., Couture P; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., Sharpe MK; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., Smith R; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., Peng N; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., England J; UK National Ion Beam Centre, University of Surrey, Guildford, Surrey, GU2 7XH, UK., Tsang SCE; Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford, OX1 3QR, UK. edman.tsang@chem.ox.ac.uk., Zhao Y; Dyson School of Design Engineering, Imperial College London, London, SW7 2BX, UK. yunlong.zhao@imperial.ac.uk.; National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK. yunlong.zhao@imperial.ac.uk., Mai L; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China. mlq518@whut.edu.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Apr 18; Vol. 15 (1), pp. 3354. Date of Electronic Publication: 2024 Apr 18.
DOI: 10.1038/s41467-024-47568-y
Abstrakt: The discovery of Mn-Ca complex in photosystem II stimulates research of manganese-based catalysts for oxygen evolution reaction (OER). However, conventional chemical strategies face challenges in regulating the four electron-proton processes of OER. Herein, we investigate alpha-manganese dioxide (α-MnO 2 ) with typical Mn IV -O-Mn III -H x O motifs as a model for adjusting proton coupling. We reveal that pre-equilibrium proton-coupled redox transition provides an adjustable energy profile for OER, paving the way for in-situ enhancing proton coupling through a new "reagent"- external electric field. Based on the α-MnO 2 single-nanowire device, gate voltage induces a 4-fold increase in OER current density at 1.7 V versus reversible hydrogen electrode. Moreover, the proof-of-principle external electric field-assisted flow cell for water splitting demonstrates a 34% increase in current density and a 44.7 mW/cm² increase in net output power. These findings indicate an in-depth understanding of the role of proton-incorporated redox transition and develop practical approach for high-efficiency electrocatalysis.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz: