Nickel-Molybdenum-Based Three-Dimensional Nanoarrays for Oxygen Evolution Reaction in Water Splitting.

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Molecules Pub Date : 2024-08-22 DOI:10.3390/molecules29163966

Zhi Lu, Shilin Li, Yuxin Wang, Jiefeng Wang, Yifan Guo, Jiaqi Ding, Kun Tang, Yingzi Ren, Long You, Hongbo Meng, Guangxin Wang

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Abstract

Water splitting is an important approach to hydrogen production. But the efficiency of the process is always controlled by the oxygen evolution reaction process. In this study, a three-dimensional nickel-molybdenum binary nanoarray microstructure electrocatalyst is successfully synthesized. It is grown uniformly on Ni foam using a hydrothermal method. Attributed to their unique nanostructure and controllable nature, the Ni-Mo-based nanoarray samples show superior reactivity and durability in oxygen evolution reactions. The series of Ni-Mo-based electrocatalysts presents a competitive overpotential of 296 mV at 10 mA·cm^-2 for an OER in 1.0 M KOH, corresponding with a low Tafel slope of 121 mV dec^-1. The three-dimensional nanostructure has a large double-layer capacitance and plenty of channels for ion transfer, which demonstrates more active sites and improved charge transmission. This study provides a valuable reference for the development of non-precious catalysts for water splitting.

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用于水分离中氧进化反应的镍钼基三维纳米阵列

水分裂是制氢的一种重要方法。但该过程的效率始终受到氧进化反应过程的控制。本研究成功合成了一种三维镍钼二元纳米阵列微结构电催化剂。它采用水热法在镍泡沫上均匀生长。由于其独特的纳米结构和可控性，镍钼基纳米阵列样品在氧进化反应中表现出卓越的反应活性和耐久性。该系列镍钼基电催化剂在 1.0 M KOH 中进行 OER 反应时，10 mA-cm-2 的竞争过电位为 296 mV，相应的塔菲尔斜率较低，为 121 mV dec-1。这种三维纳米结构具有较大的双层电容和大量的离子传输通道，这表明它具有更多的活性位点和更好的电荷传输。这项研究为开发用于水分离的非贵金属催化剂提供了有价值的参考。

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来源期刊

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.