Surface functionalization of phosphorene via P-H bond for ambient protection and robust photocatalytic H2 evolution
Surface functionalization of phosphorene via P-H bond for ambient protection and robust photocatalytic H2 evolution
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DOI：
10.1007/s40843-021-1843-y
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
Rui Shi;L. Kang;X. Bai;Yong Chen
中科院分区：
文献类型：
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作者：
Rui Shi;L. Kang;X. Bai;Yong Chen
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 approachviathe 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 H2evolution 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 O2and phosphorene-H in terms of thermodynamics and kinetics. This hydrogenation strategy is envisaged to augment the prospect of phosphorene in the field of photocatalysis.
