用La-CoP纳米棒阵列修饰的Co(OH)2纳米片用于碱性电催化析氢反应†

IF 2.7 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yaoxia Yang, Xingwei Guo, Mi Kang, Dangxia Wang and Zhiwang Yang
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引用次数: 0

摘要

开发高效廉价的析氢反应催化剂对于电化学可持续能源技术的商业可行性至关重要。本研究采用二次水热低温磷化法成功制备了负载在泡沫镍(NF)上的La-CoP/Co(OH)2纳米阵列。所制备的La-CoP/Co(OH)2/NF材料在1M KOH溶液中表现出优异的析氢性能。在10 mA cm−2的电流密度下,La CoP/Co(OH)2/NF的过电位为114 mV,Tafel斜率估计为99 mV dec−1。Co(OH)2纳米片在具有织构表面的La-CoP纳米棒上的修饰不仅提供了大的表面积和更多的活性位点,而且促进了Co(OH2)2和La-CoP之间的电子转移,加速了反应速率,进一步提高了复合材料的HER性能。此外,所制备的催化剂在碱性介质中表现出良好的稳定性和耐久性。这种方法为探索用于电解水的高效、低价格的电催化剂提供了一种可行而有效的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Co(OH)2 nanosheets decorated with La-CoP nanorod array for alkaline electrocatalytic hydrogen evolution reaction†

Co(OH)2 nanosheets decorated with La-CoP nanorod array for alkaline electrocatalytic hydrogen evolution reaction†

Developing efficient and inexpensive catalysts for the hydrogen evolution reaction (HER) is critical for the commercial viability of electrochemical sustainable energy technologies. In this study, a La-CoP/Co(OH)2 nanoarray supported on nickel foam (NF) was successfully prepared using the secondary hydrothermal and low-temperature phosphating method. The as-prepared La-CoP/Co(OH)2/NF material exhibited excellent hydrogen evolution performance in 1 M KOH solution. The overpotential of La-CoP/Co(OH)2/NF was 114 mV at the current density of 10 mA cm−2, and the Tafel slope was estimated to be 99 mV dec−1. The decoration of Co(OH)2 nanosheets on La-CoP nanorods with the textured surface not only provides a large surface area and more active sites but also promotes the transfer of electrons between Co(OH)2 and La-CoP, which accelerates the reaction rate and further improve the HER performance of the composite material. Additionally, the fabricated catalyst exhibits good stability and durability in alkaline media. This approach provides a feasible and effective strategy for exploring electrocatalysts with high efficiency and low prices for the electrolysis of water.

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来源期刊
New Journal of Chemistry
New Journal of Chemistry 化学-化学综合
CiteScore
5.30
自引率
6.10%
发文量
1832
审稿时长
2 months
期刊介绍: A journal for new directions in chemistry
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