Synergy of MoO2 with Pt as Unilateral Dual Cocatalyst for Improving Photocatalytic Hydrogen Evolution over g‐C3N4.

Autor: Su, Fengyun, Wang, Zhishuai, Tian, Mengzhen, Yang, Chunxia, Xie, Haiquan, Ding, Chenghua, Jin, Xiaoli, Chen, Jiaqi, Ye, Liqun
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Zdroj: Chemistry - An Asian Journal; 1/17/2023, Vol. 18 Issue 2, p1-8, 8p
Abstrakt: Pt is usually used as cocatalyst for g‐C3N4 to produce H2 by photocatalytic splitting of water. However, the photocatalytic performance is still limited by the fast recombination of photo‐generated electrons and holes, as well as the poor absorption of visible light. In this work, MoO2/g‐C3N4 composites were prepared, in which MoO2 synergetic with Pt photo‐deposited during H2 evolution reaction worked as unilateral dual cocatalyst to improve the photocatalytic activity. Within 4 hours of irradiation, the hydrogen production rate of MoO2‐Pt dual cocatalyst modified g‐C3N4 reached 3804.89 μmol/g/h, which was 120.18 times of that of pure g‐C3N4 (GCN, 31.66 μmol/g/h), 10.98 times of that of MoO2 modified g‐C3N4 (346.39 μmol/g/h), and 9.18 times of that of Pt modified g‐C3N4 (413.64 μmol/g/h). Characterization results demonstrate that the deficient MoO2 not only promoted visible light absorption of g‐C3N4, but also worked as a "electron pool" to capture and transfer electrons to Pt. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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