将 CoN 纳米粒子作为高效共催化剂负载在 ZnCdS 上，用于可见光下增强 H 2 演化。

Loading CoN nanoparticles as efficient cocatalysts over ZnCdS for enhanced H evolution under visible light.

机构信息

Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.

出版信息

Dalton Trans. 2019 Feb 19;48(8):2676-2682. doi: 10.1039/c8dt05087b.

DOI:10.1039/c8dt05087b

PMID:30702729

Abstract

Exploiting high performance and noble-metal-free catalysts is of great interest in photocatalytic water splitting. In this study, Co3N nanoparticles were successfully decorated on Cd0.5Zn0.5S as highly efficient co-catalysts via a facile method. The Co3N(2 wt%)/Cd0.5Zn0.5S composite sample showed the highest photocatalytic H2 evolution activity. A corresponding H2 evolution rate of 160.7 mmol h-1 g-1 was achieved in 0.35 M Na2S/0.25 M Na2SO3, which was about 25 times higher than that of a pure Cd0.5Zn0.5S sample. The H2 production rate of Co3N(2 wt%)/Cd0.5Zn0.5S reached 218.8 mmol h-1 g-1 in 1.05 M Na2S/0.75 M Na2SO3 under visible light irradiation (λ > 420 nm) and the apparent quantum yield (AQY) was 30.2% at 420 nm.

摘要

在光催化水分解中，开发高性能和无贵金属的催化剂是非常有意义的。在这项研究中，通过一种简便的方法，成功地将 Co3N 纳米粒子修饰在 Cd0.5Zn0.5S 上，作为高效的共催化剂。Co3N(2 wt%)/Cd0.5Zn0.5S 复合样品表现出最高的光催化 H2 析出活性。在 0.35 M Na2S/0.25 M Na2SO3 中，实现了相应的 H2 析出速率为 160.7 mmol h-1 g-1，是纯 Cd0.5Zn0.5S 样品的 25 倍左右。在可见光照射下（λ > 420nm），Co3N(2 wt%)/Cd0.5Zn0.5S 的 H2 生成速率达到 218.8 mmol h-1 g-1，在 420nm 时的表观量子效率（AQY）为 30.2%。