用于析氢反应电催化的氮掺杂石墨烯特定位点上单原子欠电位沉积
Single-Atom Underpotential Deposition at Specific Sites of N-Doped Graphene for Hydrogen Evolution Reaction Electrocatalysis.
作者信息
Wu Haofei, Zhang Qiwen, Chu Shufen, Du Hao, Wang Yanyue, Liu Pan
机构信息
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China.
出版信息
Materials (Basel). 2024 Oct 18;17(20):5082. doi: 10.3390/ma17205082.
Single-atom catalysts (SACs) have the advantages of good active site uniformity, high atom utilization, and high catalytic activity. However, the study of its controllable synthesis still needs to be thoroughly investigated. In this paper, we deposited Cu SAs on nanoporous N-doped graphene by underpotential deposition and further obtained a Pt SAC by a galvanic process. Electrochemical and spectroscopic analyses showed that the pyridine-like N defect sites are the specific sites for the underpotential-deposited SAs. The obtained Pt SAC exhibits a good activity in a hydrogen evolution reaction with a turnover frequency of 25.1 s. This work reveals the specific sites of UPD of SAs on N-doped graphene and their potential applications in HERs, which provides a new idea for the design and synthesis of SACs.
单原子催化剂（SACs）具有活性位点均匀性好、原子利用率高和催化活性高的优点。然而，其可控合成的研究仍需深入探讨。在本文中，我们通过欠电位沉积将铜单原子（Cu SAs）沉积在纳米多孔氮掺杂石墨烯上，并通过电偶过程进一步获得了铂单原子催化剂（Pt SAC）。电化学和光谱分析表明，类吡啶氮缺陷位点是欠电位沉积单原子的特定位点。所制备的Pt SAC在析氢反应中表现出良好的活性，周转频率为25.1 s⁻¹。这项工作揭示了氮掺杂石墨烯上欠电位沉积单原子的特定位点及其在析氢反应中的潜在应用，为单原子催化剂的设计和合成提供了新思路。
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