Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 271, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118925
Keywords
Monolayered nanosheet; Single heteroatom doping; Visible-light-driven; Hydrogen evolution; Oxygen vacancies
Funding
- Fundamental Research Funds for the Central Universities [2018JBZ107, 2019RC035]
- National Natural Science Foundation of China [91961125, 21905019, 21701002]
- Key Program for International S&T Cooperation Projects of China from the Ministry of Science and Technology of China [2018YFE0124600]
- Chemistry and Chemical Engineering Guangdong Laboratory [1932004]
- Excellent One Hundred project of Beijing Jiaotong University
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Efficient visible-light-driven hydrogen evolution (VLD-HER) is the most desirable for utilizing solar energy, but it remains a significant challenge to fabricate advanced photocatalysts. Herein, we report on a single-atom ruthenium doped monolayered TiO2 nanosheet catalyst (Ru-1/TiNS). Unlike pure TiO2 with no VLD-HER activity, Ru-1/TiNS enables efficient H-2 evolution with a mmol h(-1) g(-1) magnitude (4.81) under visible light, comparable to 8.95 mmol h(-1) g(-1) under full light spectrum. Various ex-/in-situ characterizations and theoretical calculations reveal that the single-atom Ru-1 introduces an impurity energy level, allowing light absorption up to 700 nm, and an oxygen vacancy around Ru t tends to be a charge trapping site, promoting rapid photogenerated electron separation and transportation. This study provides a promising catalyst-design strategy for high-efficiency hydrogen production using solar energy.
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