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痕迹RuO2纳米颗粒装有涂层的多壁碳纳米管,以促进在酸性和性介质下的气进化反应

Lijuan Shi¹, Xueyan Wu¹, Kenan Zhao¹

¹State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.

Journal of colloid and interface science

|October 2, 2024

概括

为进化反应 (HER) 开发高效,低成本的电催化剂至关重要. 这项研究将RuO2装饰的Ni-MWCNTs作为在酸性和性条件下高度活跃和稳定的HER催化剂.

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
催化剂是一种催化剂.

背景情况:

进化反应 (HER) 对清洁能源技术至关重要.
贵金属催化剂是昂贵的和稀有的.
开发具有成本效益和高性能的HER催化剂是一个重大挑战.

研究的目的:

为了合成和评估化多壁碳纳米管装饰与二氧化纳米颗粒 (RuO2@Ni-MWCNTs) 作为高效的 HER 电催化剂.
在酸性和性介质中研究RuO2@Ni-MWCNTs的催化性能.
评估开发的电催化剂的稳定性和耐用性.

主要方法:

通过涂层合成Ni-MWCNTs.
在Ni-MWCNT上加载微量RuO2纳米颗粒.
用于催化剂制备的化处理.
电化学表征包括HER性能测试和电化学阻抗光谱 (EIS).
电化学活性表面积 (ECSA) 的评估.
在恒定电流密度下进行长期稳定性测试.

主要成果:

RuO2@Ni-MWCNTs在酸性和性电解质中表现出色的HER性能.
催化剂表现出较低的超电位:性介质中的20.2mV和酸性介质中的73.7mV.
RuO2@Ni-MWCNTs显示了一个小的EIS,表明有效的电荷转移.
在RuO2@Ni-MWCNTs中观察到很大的ECSA.
含有不到1%Ru的催化剂表现出了显著的活性.
电催化剂在20 mA cm-2.2下经过90个小时的运行后保持了其效率,没有显著的降解.

结论:

微量RuO2纳米粒子显著增强Ni-MWCNTs的HER活性.
RuO2@Ni-MWCNTs是 HER 在各种电解质条件下具有低成本,高活性和稳定的电催化剂.
开发的催化剂为基于贵金属的HER催化剂提供了一种可行的替代方案.

关键词:

演变反应 (HER) 是一种演变反应.化多壁碳纳米管 (Ni-MWCNTs) 是一种化材料.在 RuO (((2) 里.

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