期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202204058
关键词
chromium oxide; electrocatalyst; hydrogen evolution; photocatalyst; rhodium nanoparticle
This study investigated the HER of Rh nanoparticles coated with an ultrathin layer of Cr-oxides as a model electrode for the Cr2O3/Rh-metal core-shell-type cocatalyst system. The CrOx layer on RhNP facilitated the electron transfer process, leading to increased current density for the HER. It was found that the CrOx layer promoted proton transfer to the RhNP surface and restricted electron transfer from the FTO to the electrolyte and/or RhNP, resulting in efficient photocatalytic water splitting.
The hydrogen evolution reaction (HER) of Rh nanoparticles (RhNP) coated with an ultrathin layer of Cr-oxides (CrOx) was investigated as a model electrode for the Cr2O3/Rh-metal core-shell-type cocatalyst system for photocatalytic water splitting. The CrOx layer was electrodeposited over RhNP on a transparent conductive fluorine-doped tin oxide (FTO) substrate. The CrOx layer on RhNP facilitates the electron transfer process at the CrOx/RhNP interface, leading to the increased current density for the HER. Impedance spectroscopic analysis revealed that the CrOx layer transferred protons via the hopping mechanism to the RhNP surface for HER. In addition, CrOx restricted electron transfer from the FTO to the electrolyte and/or RhNP and suppressed the backward reaction by limiting oxygen migration. This study clarifies the crucial role of the ultrathin CrOx layer on nanoparticulate cocatalysts and provides a cocatalyst design strategy for realizing efficient photocatalytic water splitting.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据