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
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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:
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李桂村

教授 博士生导师 硕士生导师

教师拼音名称:liguicun

出生日期:1974-05-12

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所在单位:材料学院综合办公室

职务:材料科学与工程学院院长

学历:博士研究生

办公地点:材料楼225房间

性别:男

联系方式:guicunli@qust.edu.cn Tel:13730918070

学位:工学博士

毕业院校:中国海洋大学

所属院系:材料科学与工程学院

学科:材料物理与化学

曾获荣誉:

2016-01-01    山东省有突出贡献的中青年专家

2012-11-07    山东省第三届优秀研究生指导教师

2011-04-01    青岛拔尖人才

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