A novel dinuclear cobalt-bis(thiosemicarbazone) complex as a cocatalyst to enhance visible-light-driven H2 evolution on CdS nanorods and a mechanism discussion

被引：4

作者：

Zhang, Hao ^{[1
]}

Zhu, Hongjie ^{[1
]}

Zhao, Haitao ^{[1
]}

Dou, Mingyu ^{[1
]}

Yin, Xingliang ^{[1
]}

Yang, Hua ^{[1
]}

Li, Dacheng ^{[1
]}

Dou, Jianmin ^{[1
]}

机构：

[1] Liaocheng Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2022年 / 426卷

基金：

中国国家自然科学基金;

关键词：

Photocatalytic H-2 evolution; CdS NRs; Dinuclear cobalt complex; Molecular cocatalyst; PHOTOCATALYTIC HYDROGEN EVOLUTION; COBALT COMPLEXES; WATER; METAL; SEMICONDUCTOR; COORDINATION; SYSTEM; HETEROJUNCTION; CHROMOPHORE; STABILITY;

D O I：

10.1016/j.jphotochem.2022.113771

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalytic water splitting to produce hydrogen has gradually become a research hotspot in recent years, and molecular cocatalysts especially cobalt-based complexes as proton reduction cocatalysts have attracted wide attention due to their high activity and selectivity. In this study, CdS nanorods were employed as photosensitizers, and a novel dinuclear cobalt-bis(thiosemicarbazone) complex with definite structure was used as a cocatalyst to improve visible-light-driven hydrogen evolution. Under the optimum conditions, this noble metal free system exhibited an average hydrogen evolution rate of 1045 mu mol.h(-1) in 8 h irradiation. This system could work for 24 h with a TON of 16,400, and the average apparent quantum yield of this system is ~21% at 420 nm. On the basis of photoelectrochemical studies and electrochemical analysis, we proposed a possible mechanism for hydrogen production in this three-component system.

引用

页数：12

共 62 条

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