Journal
ACS CATALYSIS
Volume 6, Issue 7, Pages 4253-4257Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.6b00913
Keywords
photocatalysis; hydrogen evolution reaction; electrocatalysts; co-catalysts; electron transfer
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Funding
- National Basic Research Program of China [2015CB932302]
- National Natural Science Foundation of China [U1432133, 21331005, 11321503, U1532265, J1030412, 21173205, 91127042, 21573211, 21421063]
- National Young Top-Notch Talent Support Program, Chinese Academy of Sciences [XDB01020000]
- Fok Ying-Tong Education Foundation, China [141042]
- China Postdoctoral Science Foundation [2015M581999]
- Fundamental Research Funds for the Central Universities [WK2060190027, WK2340000063, WK2060190058]
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Recently, the implantation of non-noble-metal electrocatalysts into photocatalysts has brought dramatically improved hydrogen evolution activities; yet, the mechanistic details are still under debate, because of the poor understanding of interfacial charge carrier dynamics. Here, for the first time, we unravel that it is the electrocatalytic process that plays the critical role in these heterostructured systems. Spectroscopic characterizations, combined with theoretical calculations, give a dear physical picture that the photoexcited electrons transfer from photocatalysts to phosphides electrocatalysts, then driving H-2 evolution reaction similar to electrocatalysis; and also reveal the Fermi level of electrocatalysts as a feasible descriptor for the photocatalytic activity.
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