Ni 3 C-Decorated MAPbI 3 as Visible-Light Photocatalyst for H 2 Evolution from HI Splitting

作者：Zhijie Zhao, Jiaojiao Wu, Yan‐Zhen Zheng, Nan Li, Xitao Li, Xia Tao · 发表于：ACS Catalysis · 年份：2019 · DOI：10.1021/acscatal.9b01605 · 被引用次数：153 · 研究领域：Perovskite Materials and Applications、Advanced Photocatalysis Techniques、2D Materials and Applications

A stable composite photocatalyst, that is, MAPbI 3 decorated with Ni 3 C, is synthesized by a facile surface charge-promoted self-assembly approach and is demonstrated to be a high-efficiency, stable visible-light photocatalyst for H 2 evolution in aqueous MAPbI 3 -saturated HI solution with H 3 PO 2 as a stabilizer. The optimal 15% Ni 3 C/MAPbI 3 suspension under visible illumination displays the hydrogen evolution reaction (HER) rate of 2362 μmol g –1 h –1, which is approximately 55-fold higher than that of MAPbI 3 (43 μmol g –1 h –1 ) and far superior to that of Pt/MAPbI 3 (534 μmol g –1 h –1 ). In particular, the Ni 3 C/MAPbI 3 photocatalyst is ultrastable, showing no obvious decrease of HER activity in a given HER process, that is, 10 runs, one-month storage, and another 10 runs. The origin of the superior performance is proven to be predominantly attributed to the improved capabilities of charge carrier transfer and separation as well as the massive reactive centers on the surface of MAPbI 3 by Ni 3 C decoration, together with the high stability of the composite in HI solution during the photoreaction.