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首页> 外文期刊>Fuel >Electrocatalytic hydrogen evolution reaction on carbon paste electrode modified with Ni ferrite nanoparticles
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Electrocatalytic hydrogen evolution reaction on carbon paste electrode modified with Ni ferrite nanoparticles

机译：镍铁氧体纳米粒子修饰的碳糊电极上的电催化析氢反应

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摘要

Nanoparticles of mixed oxides of Fe and Ni are prepared by a low temperature coprecipitation method. The effects of Ni content in synthesized nanoparticles on the electrocatalysts performance for hydrogen evolution reaction are investigated by electrochemical techniques. Scanning electron microscopy and X-ray diffraction spectroscopy are used for studying the morphology and structure of Ni-ferrite nanoparticles (NPs). Electrocatalytic activity of Ni-ferrite NPs for hydrogen evolution reaction is found to increase in the order of Fe_3O_4 ≤ Ni_(0.6)Fe_(204)O_4 < Ni_(0.2)Fe_(2.8)O_4 ≤ Ni_(0.8)Fe_(2.8)O_4 < Nio.4Fe_(2.6)O_4. The Tafel slopes for the hydrogen evolution reaction are found to be between 97.75 mV dec~(-1) and 122.19 mV dec~(-1) on carbon paste electrodes modified with ferrite NPs and kinetic parameters show that the Volmer step must control the hydrogen evolution reaction. The electrodes are resistive to passivation and they can be renewed easily.
机译：Fe和Ni的混合氧化物的纳米颗粒是通过低温共沉淀法制备的。通过电化学技术研究了合成纳米粒子中镍含量对析氢反应电催化剂性能的影响。扫描电子显微镜和X射线衍射光谱用于研究镍铁氧体纳米粒子（NPs）的形态和结构。发现Ni-铁氧体NPs对氢释放反应的电催化活性按Fe_3O_4≤Ni_（0.6）Fe_（204）O_4

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