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从瓦特和酸盐浴中通过脉冲电流的电子沉积获得的电催化剂,用于在性介质中增强气演化反应

Raluca Bojîncă¹, Roxana Muntean², Rebeca Crişan¹

¹Faculty of Chemical Engineering, Biotechnologies and Environmental Protection, Politehnica University Timişoara, Piata Victoriei No. 2, 300006 Timişoara, Romania.

Materials (Basel, Switzerland)

|June 27, 2025

概括

电催化剂在笔石墨上有效地在性溶液中产生. 在40°C和50 mA cm−2的酸盐浴方法为可持续的生产提供了卓越的性能和稳定性.

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
可持续能源可持续能源

背景情况:

有效的电催化剂对于通过演化反应 (HER) 实现可持续的生产至关重要.
性介质为HER提供优势,但需要强大且具有成本效益的催化剂.
基于的催化剂由于其丰富性和活性而具有前景.

研究的目的:

开发低成本,高效的电催化剂用于性介质中的HER.
为了研究电极沉积参数对催化剂性能的影响.
为了比较使用不同类型的浴制备的电催化剂.

主要方法:

一步脉冲电流电极沉积Ni到笔石墨上.
浴类型的系统变化 (酸性瓦特与性酸盐),电流密度和温度.
使用扫描电子显微镜 (SEM) 和电化学技术 (LSV,时计,EIS) 进行表征.

主要成果:

最佳的催化剂是Ni从酸盐浴中沉积在50 mA cm-2和40°C的温度下.
这种催化剂表现出极好的性能:0.93 mA cm−2交换电流密度,-208 mV dec−1塔菲尔斜率,以及低超电位 (-10 mA cm−2时-210 mV).
酸盐浴催化剂与瓦特浴催化剂相比,显示出更高的活性和稳定性,与纯相比,约92mV的超电位降低.

结论:

一步式电解沉积是制备Ni HER电催化剂的有效方法.
酸浴和特定的沉积参数 (40°C,50 mA cm-2) 产生了优越的HER性能和稳定性.
这些发现有助于开发用于性生产的经济有效的催化剂.

关键词:

性介质是一种性介质.酸盐浴中的酸盐气演化反应反应的反应尼克尔的电极位.脉冲电流的电极位置.

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