光催化
范德瓦尔斯力
异质结
单层
分解水
化学
材料科学
工作(物理)
纳米技术
化学物理
催化作用
物理
光电子学
分子
热力学
有机化学
作者
Hui‐Yan Zhao,Baonan Jia,Xiaoning Guan,Yingjie Chen,Xiaoling Zhu,Lihong Han,Pengfei Lu
摘要
Photocatalytic water splitting, which can use abundant and clean solar energy, is friendly to the environment and consumes less energy. This work predicts the type-II β-AsP/g-C6N6 van der Waals (vdW) heterostructure as a promising photocatalyst for water splitting using first-principles calculations. Compared with the g-C6N6 monolayer, the β-AsP/g-C6N6 heterostructure not only can effectively separate photogenerated electron and hole pairs but also shows considerable light absorption and better photocatalyst performances. The optical absorption coefficient of the β-AsP/g-C6N6 heterostructure has also extremely increased, more than ten times that of the g-C6N6 monolayer. The β-AsP/g-C6N6 heterostructure with little compression (-2%) could be conducive to the hydrogen evolution reaction with a Gibbs free energy closer to zero (-0.46 eV) compared to monolayers. The oxygen evolution reaction has a low theoretical overpotential of 0.63 V. These results indicate that it exhibits favorable performances as a photocatalyst. This work predicts the possible application of the β-AsP/g-C6N6 heterostructure as a photocatalyst and expands the scope of renewable energy devices.
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