A three-dimensional nanostructure of NiFe(OH) (X) nanoparticles/nickel foam as an efficient electrocatalyst for urea oxidation.
A three-dimensional nanostructure of NiFe(OH) (X) nanoparticles/nickel foam as an efficient electrocatalyst for urea oxidation.
复制标题
NiFe(OH)(X)纳米颗粒/泡沫镍的三维纳米结构作为尿素氧化的高效电催化剂
作者：
开发高性能的尿素氧化电催化剂不仅可以解决环境污染问题，而且可以通过电极制氢来解决能源危机问题。多孔三维纳米结构作为高效的电催化剂的制备已成为一项重要的工作。在这里，我们开发了一种新的三维（3D）纳米结构的NiFe（OH）X纳米粒子/泡沫镍与高活性面积通过一个简单的电镀方法和随后的处理与铁离子溶液。对于在具有0.33 M尿素的1.0 M KOH电解质中驱动100 mA cm-2的电流密度，该结构显示出比具有1.395 V（相对于RHE）的电势（具有1.025 V的过电势）的对照样品（Ni/Ni泡沫）大得多的UOR活性。本工作不仅为三维纳米结构的快速、大规模制备提供了可能，而且为设计和制备高性能的电催化剂提供了一条新的途径。采用一种简便、规模化的方法制备了NiFe（OH）X纳米粒子/泡沫镍高性能UOR电催化剂。
Developing high-performance electrocatalysts for urea oxidation reaction (UOR) can not only solve the problem of environmental pollution, but also solve the problem of the energy crisis by producing hydrogen for electrodes. The preparation of porous three-dimensional nanostructures as efficient electrocatalysts has become important work. Here, we developed a novel three-dimensional (3D) nanostructure of NiFe(OH)X nanoparticles/nickel foam with a high active area by a simple electroplating method and a subsequent treatment with ferric ion solution. This structure shows much greater UOR activity than the control sample (Ni/Ni foam) with the potential of 1.395 V (vs. RHE) (with an overpotential of 1.025 V) for driving the current density of 100 mA cm−2 in 1.0 M KOH electrolyte with 0.33 M urea. This work not only provides rapid and large-scale preparation of a three-dimensional nanostructure, but also gives a new way to design and obtain high-performance electrocatalysts. NiFe(OH)X nanoparticles/Ni foam as a high-performance UOR electrocatalyst was prepared by a facile and large-scale method.
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