期刊
SCIENCE CHINA-MATERIALS
卷 65, 期 5, 页码 1245-1251出版社
SCIENCE PRESS
DOI: 10.1007/s40843-021-1843-y
关键词
phosphorene; antioxidation; hydrogenation; photocatalytic H-2 evolution
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
- National Natural Science Foundation of China [21773275, 21971250]
- K.C. Wong Education Foundation
- CAS-Croucher Funding Scheme for Joint Laboratories
The introduction of P-H covalent bonds on the surface of phosphorene through a hydrogenation approach inhibits oxidation without compromising photocatalytic performance, showcasing potential for enhanced applications in the field of photocatalysis.
The facile oxidation of few-layer black phosphorus (i.e., phosphorene) in the atmospheric environment is a major hurdle for its applications in photocatalytic solar-energy conversion. The introduction of protective layers, such as a surface capping layer, surface coordination, and P-C covalent functionalization, can protect phosphorene from oxidative degradation but inevitably decreases its photocatalytic performance due to the blockage of catalytic active sites. Herein, we develop a hydrogenation approach via the introduction of P-H covalent bonds on the surface of phosphorene (i.e., phosphorene-H) to inhibit the oxidation of phosphorene-H without sacrificing the original photocatalytic H-2 evolution performance. Experiments and density functional theory calculations demonstrate that about 5 mol% of phosphorus atoms in phosphorene-H are involved in forming P-H covalent bonds, hindering the reaction between O-2 and phosphorene-H in terms of thermodynamics and kinetics. This hydrogenation strategy is envisaged to augment the prospect of phosphorene in the field of photocatalysis.
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