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多金属电催化剂具有晶体/无形结构,用于增强性水/海水演变

Songbo Chen¹, Dong Liu², Pengfei Zhou³

¹College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China.

Journal of colloid and interface science

|July 14, 2023

概括

一种新的Ni/MoO2@CoFeOx纳米板催化剂在产生气方面表现出了卓越的性能. 这种多金属电催化剂在各种条件下提供高活性和稳定性,推进了非贵金属催化剂技术.

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
纳米技术纳米技术

背景情况:

非贵金属电催化剂对于高效的气产生至关重要.
由于协同效应,多金属催化剂显示出有前途的效果,但往往由于界面兼容性差而受到损害.
开发具有增强协同效应和稳定性的催化剂对于实际应用至关重要.

研究的目的:

设计和合成一种具有改善界面兼容性的新型多金属电催化剂 (Ni/MoO2@CoFeOx).
评估在不同性介质中开发的催化剂的演化反应 (HER) 活性和稳定性.
阐明结构-活性关系有助于催化剂的增强性能.

主要方法:

合成具有晶体/无形结构的Ni/MoO2@CoFeOx纳米板催化剂.
HER活性的电化学表征,包括在性水,性海水和天然海水中在10 mA cm−2的超电位测量.
在高电流密度下 (500 mA cm−2) 在性溶液中进行稳定性测试.
现场拉曼光谱和先进的结构特征分析,以分析催化剂的特性.

主要成果:

Ni/MoO2@CoFeOx催化剂在10mA cm−2.2.2时表现出18mV (性水),39mV (性海水) 和93mV (天然海水) 的超低超电位.
催化剂表现出极高的稳定性,在性溶液中在500 mA cm−2的高电流密度下保持性能.
鉴定结果显示,晶体/形态接口,协同多金属相互作用,增强导电性,以及丰富的不和位点,都对高催化活性和稳定性有所贡献.

结论:

新的Ni/MoO2@CoFeOx纳米板催化剂有效地克服了多金属系统中的界面兼容性问题.
催化剂的独特的晶体/形态结构和协同的多金属效应导致了优越的HER活性和稳定性.
这项工作提出了一个可行的策略,用于设计高性能,稳定的非贵金属电催化剂用于生产.

关键词:

晶体/形态无形的电催化剂是一种电催化剂.的进化是因为的进化.多种金属的多种金属水/海水电解的方法

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