Pd Nanoparticles Coupled to NiMoO 4 –C Nanorods for Enhanced Electrocatalytic Ethanol Oxidation

作者：Meiling Wang, Dong Li, Yuzhu Tian, Jin Zhao, Zhizhu Yue, Xiaoxia Wang, Xiaofang Ma, Jinjin Wang, Tianjun Hu, Jianfeng Jia, Hai‐Shun Wu · 发表于：ACS Applied Materials & Interfaces · 年份：2021 · DOI：10.1021/acsami.1c14320 · 被引用次数：26 · 研究领域：Electrocatalysts for Energy Conversion、Catalytic Processes in Materials Science、Advanced battery technologies research

The interfacial interaction including chemical bonding or electron transfer and even physisorption in composite electrocatalysts has a considerable effect on electrocatalytic oxidation reaction. Herein, we report a tremendously enhanced catalytic activity and excellent durability for the ethanol electro-oxidation reaction in NiMoO 4 –C-supported Pd composites (Pd/NiMoO 4 –C) compared to the commercial Pd/C (10%) catalyst. The X-ray powder diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy measurements disclose that the strong electron transfer between NiMoO 4 nanorods and Pd nanoparticles likely induces the formation of more electrochemical active centers and improves the adsorption–desorption capacity of reactants and corresponding intermediates. In addition, the Pd/NiMoO 4 –C composite exhibits superior specific activity for ethanol oxidation compared to the Pd/NiMoO 4 catalyst with physically incorporated carbon black, which further reveals that the stronger anchoring effect between Pd and C and higher electrical conductivity in Pd/NiMoO 4 –C composites are also conducive to promote the ethanol oxidation reaction. These discoveries provide an effective and simple method for the design of advanced electrocatalysts and provide more insights into optimizing the electronic interaction between the catalyst and support in general.