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作为尿素电解的强大的电催化剂,控制合成M剂的NiVS (M = Co,Ce和Cr)

Chao Wang¹, Qirun Wang¹, Xiaoqiang Du¹

¹School of Chemistry and Chemical Engineering, Shanxi Key Laboratory of High Performance Battery Materials and Devices, North University of China, Xueyuan road 3, Taiyuan 030051, People's Republic of China. duxq16@nuc.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|September 1, 2023

概括

本研究介绍了M-doped NiVS复合材料,用于高效的尿素电解,为废水处理和能源生产提供可持续的解决方案. Ce-NiVS 显示出对进化和尿素氧化反应的优异催化活性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
环境科学环境科学

背景情况:

尿素电解为含尿素的废水处理和减轻能源危机提供了双重解决方案.
开发高效,具有成本效益的电催化剂对于推进尿素电解技术至关重要.

研究的目的:

通过简单的热水方法合成新型M合NiVS (M=Co,Ce,Cr) 复合物.
评估这些复合材料用于尿素电解的电催化性能,重点关注进化和尿素氧化反应.
阐明结构-活性关系和兴奋剂对催化效率的协同效应.

主要方法:

热合成的M合NiVS复合材料.
电化学表征,包括对演化反应 (HER) 和尿素氧化反应 (UOR) 的超电位测量.
密度函数理论 (DFT) 计算以了解电子结构和吸附特性.

主要成果:

Ce-NiVS表现出了显著的催化活性,在10 mA cm-2.2时,只需要HER的141 mV超电位和UOR的1.291 V超电位.
Ce-NiVS/NF作为一个双功能电极,在1.55V的低电压下实现了10mA cm-2的整体尿素电解.
DFT计算证实,VS4的低基布斯自由能量用于吸附和Ce-NiS的增强电子导电性有助于卓越的性能.

结论:

化NiVS复合材料对尿素电解具有出色的催化活性和稳定性,性能优于许多现有的催化剂.
增强的性能归因于Ce兴奋剂增加的活性位点和改善的导电性.
这项研究为设计用于可持续能源应用的低成本,高性能电催化剂提供了有希望的途径.

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