论文成果

Modulating electronic structure and sulfur p-band center by anchoring amorphous Ni@NiS<sub>x</sub> on crystalline CdS for expediting photocatalytic H<sub>2</sub> evolution

发布时间:2024-01-19  点击次数:

关键字:HETEROSTRUCTURE

摘要:Photocatalytic water splitting is a prospective approach to address the energy and environmental challenges. Herein, an amorphous Ni@NiSx cocatalyst has been fabricated and simultaneously assembled onto CdS to form amorphous-crystalline Ni@NiSx-CdS photocatalyst via a partial reduction strategy. Comprehensive experiments and theoretical calculations demonstrate that the synergistic effects between the electronic coupling of amorphous-crystalline interface and the gradient work function iation induced by Ni nanocluster encapsulation achieve the deeper downshift of the S p-band center to optimize H* intermediate adsorption, enhance charge extraction ability though Schottky junction and lower H* adsorption Gibbs free energy (Delta G(H*)). Accordingly, the optimal Ni@NiSx-CdS photocatalyst delivers a remarkable photocatalytic H-2 production rate of 78.7 mmol.g(-1).h(-1) with an apparent quantum efficiency (AQE) of 36.74% at 420 nm, which is approximately 18.3 and 1.5 times than that of CdS and NiSx-CdS, respectively. This work offers a novel insight into the development of amorphous nanocomposite cocatalysts for promoting solar-to-H-2 energy conversion.

卷号:342

期号:

是否译文:

崂山校区 - 山东省青岛市松岭路99号   
四方校区 - 山东省青岛市郑州路53号   
中德国际合作区(中德校区) - 山东省青岛市西海岸新区团结路3698号
高密校区 - 山东省高密市杏坛西街1号   
济南校区 - 山东省济南市文化东路80号©2015 青岛科技大学    
管理员邮箱:master@qust.edu.cn

访问量: | 最后更新时间:-- | 开通时间:-- |手机版