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Electronic Redistribution: Construction and Modulation of Interface Engineering on CoP for Enhancing Overall Water Splitting
Author(s) -
Yang Lei,
Liu Ruiming,
Jiao Lifang
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201909618
Subject(s) - materials science , oxygen evolution , water splitting , electrocatalyst , electrolysis of water , alkaline water electrolysis , dissociation (chemistry) , electrolyte , electrolysis , catalysis , chemical engineering , redistribution (election) , hydrogen , hydrogen production , gibbs free energy , adsorption , chemical physics , electrode , nanotechnology , chemistry , thermodynamics , electrochemistry , biochemistry , physics , organic chemistry , photocatalysis , politics , political science , law , engineering
Modulating and constructing interface engineering is an efficient strategy to enhance catalytic activity for water splitting. Herein, a hybrid nanoarray structure of V‐CoP@a‐CeO 2 , where “a” represents amorphous, integrated into carbon cloth is fabricated for water splitting. The synergy effect between V and CeO 2 can increase the electron density of Co atoms at active sites, further optimizing the Gibbs free energy of H* adsorption energy (Δ G H* ). Besides, V‐CoP@a‐CeO 2 possesses lower water adsorption/dissociation energies, enabling accelerated reaction kinetics in alkaline media. As expected, the V‐CoP@a‐CeO 2 exhibits superior performance toward the hydrogen evolution reaction and the oxygen evolution reaction. More importantly, a two‐electrode electrolyzer combined with an electrocatalyst of V‐CoP@ a‐CeO 2 only demands that voltages of electrolytic cell are 1.56 and 1.71 V to achieve the current densities of 10 and 100 mA cm −2 , respectively. This work provides guidance for the design or optimization of materials for water electrolysis and beyond.