Miao Miao Ren, Xiao Hui Chen, Ting Li, Qing Zhang, Jia Huan Jia, Nian Bing Li, Hong Qun Luo
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引用次数: 0
摘要
电催化制氢为解决当前能源枯竭问题提供了一个很有前途的解决方案。本文采用一种简单的方法,成功构建了碳布(CC)上的RuNi/MoN异质结构RuNi/MoN@CC,实现了形貌和电子结构的双重调控。在Ni的影响下,原位生成的MoN继承了NiMoO4前驱体的形貌,呈现纳米线形态,有利于增加电化学活性面积。否则,Ni的引入作为牺牲还原剂,确保Ru作为电子供体保持在零氧化态,以优化内部电子分布。在双重调节的影响下,RuNi/MoN@CC在碱性、中性和酸性电解质中实现-10 mA cm-2的电流密度仅需66、92和149 mV, Tafel斜率为50.4、56.2和71.8 mV / 1。这项工作将为今后探索适用于大pH范围的过渡金属基催化剂提供有效的指导。
Charge-redistributed RuNi/MoN heterojunction enables efficient hydrogen evolution in a wide pH range
Electrocatalytic hydrogen production offers a promising solution to address current energy depletion. Herein, a RuNi/MoN heterostructure on carbon cloth (CC), RuNi/MoN@CC, was successfully constructed using a simple method, allowing for dual regulation of morphology and electronic structure. Under the influence of Ni, the in-situ generated MoN inherits the morphology of the NiMoO4 precursor, presenting a nanowire morphology, which is favorable for increasing electrochemical active area. Otherwise, the introduction of Ni acts as a sacrificial reducing agent and ensures that Ru remains in zero oxidation state as an electron donor to optimize the internal electronic distribution. Under the influence of dual regulation, the RuNi/MoN@CC requires only 66, 92, and 149 mV to achieve a current density of −10 mA cm−2 in alkaline, neutral, and acidic electrolytes, with the Tafel slopes of 50.4, 56.2, and 71.8 mV dec−1. This work will provide effective guidance for future exploration of transition metal-based catalysts suitable for a wide pH range.
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies