光催化
分解水
材料科学
催化作用
光化学
光催化分解水
半导体
电子转移
镍
试剂
接受者
多金属氧酸盐
电子
人工光合作用
化学工程
光电子学
化学
物理化学
物理
冶金
量子力学
生物化学
凝聚态物理
工程类
作者
Yu Dong,Qing Han,Qiyu Hu,Chunjiang Xu,Congzhao Dong,Yong Peng,Yong Ding,Ya‐Qian Lan
标识
DOI:10.1016/j.apcatb.2021.120214
摘要
An efficient and stable photocatalyst for overall water splitting is desirable for solar-energy conversion. Herein, Ni4P2[email protected] catalyst was obtained in situ photoreaction [email protected] semiconductor composite and [Ni4(H2O)2(PW9O34)2]10− (Ni4P2) polyoxometallate. Photocatalytic hydrogen evolution from pure water is realized using CdS as the light harvester, CQDs as the electron acceptor and donor and Ni4P2 as catalyst without addition sacrificial reagents under visible light irradiation (λ = 420 nm), which exhibits water splitting activity with H2 evolution rate up to 145 μmol gcat-1 h-1. Experiments confirm the electrons transfer from CdS to CQDs, then to Ni4P2, resulting in accumulation of the electrons in Ni4P2 for H2 evolution. The generated holes at the VB of CdS transfer to CQDs and oxidize H2O to H2O2. The rotating ring-disk electrode test confirms the two-electron process (2H2O → H2 + H2O2). This work proposes an elegant strategy for how to design multicomponent photocatalyst to realize efficient water splitting.
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