光电流
赤铁矿
材料科学
分解水
钝化
光催化
可逆氢电极
化学工程
人工光合作用
电极
能量转换效率
图层(电子)
纳米技术
光电子学
电化学
催化作用
化学
工作电极
物理化学
冶金
工程类
生物化学
作者
Taotao Wang,Hongyun Cao,Ming Huang,Pingwu Du
标识
DOI:10.1021/acs.jpcc.1c06595
摘要
It is a great challenge to develop efficient artificial photosynthesis systems by mimicking natural photosynthesis. In this present work, an organo-inorganic hybrid photoanode was fabricated by depositing ultrathin NiFe MOF nanolayers and molecular cobaloxime cocatalyst on the surface of Ti-doped porous hematite (Ti-PH). This hybrid photoanode exhibited a high photocurrent density of 2.45 mA/cm2 at 1.23 V vs the reversible hydrogen electrode (RHE) under AM 1.5 G illumination with excellent stability. Moreover, the optimal incident photon-to-current efficiency (IPCE) of the hybrid photoanode reached 83.0% at 365 nm and the surface charge injection efficiency (ηinj) was improved to 87.5% at 1.23 V vs RHE. Detailed investigations reveal that NiFe MOFs can effectively facilitate charge separation as a hole-transport layer and molecular cobaloxime cocatalyst can passivate surface trap states to increase water oxidation kinetics.
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