Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202204711
Keywords
Nickel; Photocatalysis; Red Phosphorus; Single-Atom Catalysts; Water Splitting
Categories
Funding
- National Natural Science Foundation of China [51888103, 52076177]
- China National Key Research and Development Plan Project [2021YFF0500503]
- Shaanxi Technical Innovation Guidance Project [2018HJCG-14]
- Sichuan Science and Technology Program [2021YFSY0047]
- Natural Science Basic Research Program of Shaanxi Province [2019JCW-10]
- China Fundamental Research Funds for the Central Universities
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Single-atom nickel catalysts prepared on red phosphorus using a reactive-group guided strategy exhibit elevated hydrogen evolution rate under visible-light irradiation due to their specific Janus structure.
Single-atom nickel catalysts hold great promise for photocatalytic water splitting due to their plentiful active sites and cost-effectiveness. Herein, we adopt a reactive-group guided strategy to prepare atomically dispersed nickel catalysts on red phosphorus. The hydrothermal treatment of red phosphorus leads to the formation of P-H and P-OH groups, which behave as the reactive functionalities to generate the dual structure of single-atom P-Ni and P-O-Ni catalytic sites. The produced single-atom sites provide two different functions: P-Ni for water reduction and P-O-Ni for water oxidation. Benefitting from this specific Janus structure, Ni-red phosphorus shows an elevated hydrogen evolution rate compared to Ni nanoparticle-modified red phosphorus under visible-light irradiation. The hydrogen evolution rate was additionally enhanced with increased reaction temperature, reaching 91.51 mu mol h(-1) at 70 degrees C, corresponding to an apparent quantum efficiency of 8.9 % at 420 nm excitation wavelength.
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