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首页> 外文期刊>Journal of Materials Engineering and Performance >Benchmark Electrocatalysis Activity of 3D-Ni-Co-TiO2 Nanocomposites for Hydrogen Fuel Production Via Alkaline Electrolytes
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Benchmark Electrocatalysis Activity of 3D-Ni-Co-TiO2 Nanocomposites for Hydrogen Fuel Production Via Alkaline Electrolytes

机译：3D-Ni-Co-TiO2纳米复合材料的基准电催化活性通过碱性电解质产生氢燃料生产

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The invention of sustainable electrocatalysts for electrochemical hydrogen evolution reaction (HER) as inexpensive and efficient contenders is very necessary to energy future of the day life replacing determinate conventional fuel. Ni based electrocatalysts are the most promising non-noble transition metals as an alternative to precious metals. Here, we electroplated new 3D-Ni-Co-TiO2 nanocomposites as the benchmark electrocatalyst for HER in alkaline electrolytes. Electrodeposited Nickel-cobalt-titania nanocomposites of various matrices compositions were obtained via a gluconate plating bath containing colloidal TiO2 particles. The surface morphology, chemical composition and crystal structure of the various 3D-Ni-Co-TiO2 nanocomposites were characterized by SEM, TEM, EDX, XPS and XRD analysis. Mixing of ultrasonication and mechanical stirring guarantees the homogenous dispersion of TiO2 inside Ni-Co matrices which confirmed by the TEM image. 3D-Ni-Co-TiO2 nanocrystalline composites exposed the electrocatalytic activity greater than the most active metal Pt. Ni-47.6Co-4.01TiO(2) nanocrystalline composite attained the highest current density for HER of 900 mA cm(-2) while Pt showed 630 mA cm(-2) at - 2 V potential in 1.0 M KOH. The nanocrystalline Ni-Co-TiO2 composites possess the superior electrocatalytic properties toward the HER in 1.0 M KOH which are remarkably active than the most known electrocatalyst Pt by 1.5 times. The electrocatalytic properties of 3D-Ni-Co-TiO2 composites toward the HER were studied utilizing potentiodynamic polarization and electrochemical impedance spectroscopy methods.
机译：电化学析氢反应（HER）的可持续电催化剂作为廉价高效的竞争者的发明，对于未来的日常生活中替代确定性的常规燃料是非常必要的。镍基电催化剂是最有希望替代贵金属的非贵过渡金属。在这里，我们电镀了新的3D-Ni-Co-TiO2纳米复合材料，作为她在碱性电解质中的基准电催化剂。通过含有胶体TiO2颗粒的葡萄糖酸盐镀液，获得了不同基体组成的电沉积镍钴二氧化钛纳米复合材料。通过SEM、TEM、EDX、XPS和XRD分析对各种3D-Ni-Co-TiO2纳米复合材料的表面形貌、化学成分和晶体结构进行了表征。超声波和机械搅拌的混合保证了TiO2在Ni-Co基体中的均匀分散，这一点得到了TEM图像的证实。3D-Ni-Co-TiO2纳米晶复合材料暴露的电催化活性大于最活跃的金属铂。Ni-47.6Co-4.01TiO（2）纳米晶复合材料的HER电流密度最高，为900 mA cm（-2），而Pt在1.0 M KOH的-2 V电位下的电流密度为630 mA cm（-2）。纳米晶Ni-Co-TiO2复合材料在1.0 M KOH中对HER具有优异的电催化性能，其活性比最已知的电催化剂Pt高1.5倍。利用动电位极化法和电化学阻抗谱法研究了3D-Ni-Co-TiO2复合材料对HER的电催化性能。

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