材料科学
双金属片
光催化
磷化物
氧化物
多孔性
石墨烯
分解水
催化作用
双功能
纳米技术
析氧
化学工程
电化学
电极
复合材料
金属
冶金
物理化学
有机化学
化学
工程类
作者
Xinding Lv,Xitao Li,Yang Chen,Xiaoqing Ding,Yifan Zhang,Yan‐Zhen Zheng,Siqi Li,Xiangnan Sun,Xia Tao
标识
DOI:10.1002/adfm.201910830
摘要
Abstract Porous ultrathin 2D catalysts are attracting great attention in the field of electro/photocatalytic hydrogen evolution reaction (HER) and overall water splitting. Herein, a universal pH‐controlled wet‐chemical strategy is reported followed by thermal and phosphorization treatment to prepare large‐size, porous and ultrathin bimetallic phosphide (NiCoP) nanosheets, in which graphene oxide is adopted as a template to determine the size of products. The thickness of the resultant NiCoP nanosheets ranges from 3.5 to 12.8 nm via delicately adjusting pH from 7.8 to 8.5. The thickness‐dependent electrocatalytic performance is evidenced experimentally and explained by computational studies. The prepared large‐size ultrathin NiCoP nanosheets show excellent bifunctional electrocatalytic activity for overall water splitting, with low overpotentials of 34.3 mV for HER and 245.0 mV for oxygen evolution reaction, respectively, at 10 mA cm −2 . Furthermore, the NiCoP nanosheets exhibit superior photocatalytic HER performance, achieving a high HER rate of 238.2 mmol h −1 g −1 in combination with commonly used photocatalyst CdS, which is far superior to that of Pt/CdS (81.7 mmol h −1 g −1 ). All these results demonstrate large‐size porous ultrathin NiCoP nanosheets as an efficient and multifunctional electro/photocatalyst for water splitting.
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