高度对称的24面体凹面BiVO多面体，由多个高指数面界定，在可见光下具有显著的光催化析氧性能。

Highly symmetrical, 24-faceted, concave BiVO polyhedron bounded by multiple high-index facets for prominent photocatalytic O evolution under visible light.

作者信息

Hu Jianqiang, He Huichao, Li Liang, Zhou Xin, Li Zhaosheng, Shen Qing, Wu Congping, Asiri Adullah M, Zhou Yong, Zou Zhigang

机构信息

National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, P. R. China.

出版信息

Chem Commun (Camb). 2019 Apr 18;55(33):4777-4780. doi: 10.1039/c9cc01366k.

DOI:10.1039/c9cc01366k

PMID:30951063

Abstract

A highly symmetrical, 24-faceted, concave BiVO4 polyhedron was fabricated, bounded by multiple high-index {012}, {210}, {115}, and {511} facets, exhibiting impressive photocatalytic O2 evolution for water oxidation in the absence of any cocatalysts, more than two orders of magnitude higher than that of the bulk materials. The corresponding apparent quantum yield (AQY) of O2 evolution was measured as high as 30.7% under 420 nm light irradiation, a new record AQY for BiVO4. The high-index facets are not only energetically favorable for water dissociation, but also exhibit an obvious reduction in the overpotential (0.7-1.0 V) for the oxygen evolution reaction.

摘要

制备了一种高度对称的、24面的、凹面的BiVO₄多面体，其由多个高指数{012}、{210}、{115}和{511}面界定，在没有任何助催化剂的情况下，表现出令人印象深刻的光催化析氧用于水氧化的性能，比块状材料高出两个多数量级。在420 nm光照射下，相应的析氧表观量子产率（AQY）测得高达30.7%，这是BiVO₄的新AQY记录。高指数面不仅在能量上有利于水的解离，而且在析氧反应的过电位（0.7 - 1.0 V）方面也表现出明显降低。