物理化学学报2024，Vol.40Issue(7)：47-49,3.DOI:10.3866/PKU.WHXB202307040
CoFe MOF衍生的双金属氢氧化物助催化剂促进稳定的太阳能水分解
Bimetallic Oxyhydroxide Cocatalyst Derived from CoFe MOF for Stable Solar Water Splitting
摘要
Abstract
Metal-organic frameworks(MOFs)as efficient electrocatalysts can be employed as the promising cocatalysts in photoelectrochemistry.Herein,a strategy is developed to metal-organic frameworks as oxygen evolution cocatalyst(OEC)combined with semiconductor for improving the charge transport and reducing the bulk/surface carrier recombination.This advanced CoFe MOF/BiVO4 photoanode exhibits a photocurrent density of 4.5 mA∙cm-2 at 1.23 V(vs.RHE)under AM 1.5G illumination,achieving outstanding long-term photostability.Remarkably,with the reconstruction of MOF in the long-term water oxidation reaction,more stable metal oxyhydroxides are formed on the surface of BiVO4 and the photocurrent density of the photoelectrode is further enhanced to 5 mA∙cm-2.From density functional theory calculations,the enhanced photoelectrochemical(PEC)performance can be attributed to the coupling effect between Co and Fe decreasing the free energy barriers and accelerating the reaction kinetics.This work focuses on the reconfiguration of CoFe MOF catalyst to bimetallic hydroxide during long-term water oxidation.This work enables us to develop an effective pathway to design and fabricate efficient and stable photoanodes through MOFs catalysts for feasible PEC water splitting.关键词
CoFe MOF/太阳能水分解/表面改性/表面重建/BiVO4Key words
CoFe MOF/Solar water splitting/Surface modification/Surface reconstruction/BiVO4分类
化学引用本文复制引用
任世杰,高明泽,高瑞廷,王蕾..CoFe MOF衍生的双金属氢氧化物助催化剂促进稳定的太阳能水分解[J].物理化学学报,2024,40(7):47-49,3.基金项目
The work was supported by the National Key Research and Development Program of China(2022YFA1205200)and the National Natural Science Foundation of China(21965024,22269016).中国国家重点研究发展计划(2022YFA1205200)和国家自然科学基金(21965024,22269016)资助项目 （2022YFA1205200）
