催化作用
氢
电化学
材料科学
密度泛函理论
分解水
电催化剂
吉布斯自由能
氮气
化学工程
制氢
过渡金属
纳米结构
兴奋剂
化学物理
纳米技术
无机化学
化学
物理化学
计算化学
热力学
电极
有机化学
物理
工程类
光电子学
光催化
作者
You Li,Yi Wan,Jiamin Yao,Hongqian Zheng,Xi Wang,Xuan Liu,Bo Ouyang,Chengxi Huang,Kaiming Deng,Erjun Kan
摘要
Two-dimensional (2D) layered transition metal dichalcogenides such as MoS2 have been viewed as the most favorable candidates for replacing noble metals in catalyzing the hydrogen evolution reaction in water splitting owing to their earth abundance, superb chemical stability, and appropriate Gibbs free energy. However, due to its low number of catalytic sites and basal catalytic inertia, the pristine MoS2 displayed intrinsically unsatisfactory HER catalytic activity. Here, the hydrogen evolution catalytic activities of nanostructured MoS2 powder before and after plasma modification with nitrogen doping were experimentally compared, and the influence of treatment parameters on the hydrogen evolution catalytic performance of MoS2 has been studied. The feasibility of regulating hydrogen evolution catalytic activity by nitrogen doping of MoS2 was verified based on density functional theory calculations. Our work demonstrates a more convenient and faster way to develop cheap and efficient MoS2-based catalysts for electrochemical hydrogen evolution reactions. Additionally, theoretical studies reveal that N-doped MoS2 exhibits strong hybridization between Mo-d and N-p states, causing magnetism to evolve, as confirmed by experiments.
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