Atomically Dispersed Janus Nickel Sites on Red Phosphorus for Photocatalytic Overall Water Splitting
Document Type
Article
Publication Date
5-6-2022
Abstract
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 μmol h⁻¹ at 70 °C, corresponding to an apparent quantum efficiency of 8.9 % at 420 nm excitation wavelength.
Keywords
nickel, photocatalysis, red phosphorus, single-atom catalysts, water splitting
Language
English
Publication Title
Angewandte Chemie International Edition
Grant
2018HJCG‐14
Rights
© 2022 The Authors. This is an open access work distributed under the terms of the Creative Commons Attribution-Non-Commercial (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Recommended Citation
M. Wang, S. Xu, Z. Zhou, C.-L. Dong, X. Guo, J.-L. Chen, Y.-C. Huang, S. Shen, Y. Chen, L. Guo, C. Burda, Angew. Atomically Dispersed Janus Nickel Sites on Red Phosphorus for Photocatalytic Overall Water Splitting. Chem. Int. Ed. 2022, 61, e202204711; Angew. Chem. 2022, 134, e202204711.
Manuscript Version
Final Publisher Version