通用pH电催化进化与Au基高合金的电催化进化
Sangmin Jeong1, Anthony J Branco1, Silas W Bollen1
1Department of Chemistry, University of Massachusetts Lowell, Lowell, MA 01854, USA. michael_ross@uml.edu.
Nanoscale
|June 4, 2024
概括
高合金纳米粒子 (AuPdFeNiCo HEA NPs) 显示了增强的演化反应 (HER) 活性. 这些新型催化剂为贵金属电催化剂提供了一个有前途的替代品,用于在各种pH水平上高效地生产.
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:
- 减少电催化剂中的类金属对于成本效益高的生产至关重要.
- 高合金 (HEAs) 具有可调节的组合物和表面活性,可提高催化性能.
研究的目的:
- 为增强演化反应 (HER) 合成和表征新的AuPdFeNiCo HEA纳米粒子 (NP).
- 评估这些HEA NP在广泛的pH范围内的HER性能,并将它们与现有的催化剂进行比较.
主要方法:
- 通过湿浸浸的方式合成AuPdFeNiCo HEA NP.
- 使用X射线衍射 (XRD),X射线光电子光谱 (XPS) 和高分辨率传输电子显微镜 (HR-TEM) 的表征.
- 在酸性,中性和性电解质中对HER性能进行电化学评估.
主要成果:
- 在所有测试的pH值中,AuPdFeNiCo HEA NP表现出优越的HER活性,相比于单个金属对应物.
- 这些HEANP在酸性和性介质中表现出比商业Pt/C更强的电化学活性.
- 在中性电解质中,AuPdFeNiCo HEA NPs在540 mV下达到100 mA cm-2,超过了Pt/C (570 mV).
结论:
- AuPdFeNiCo HEA NPs是HER的有效电催化剂,提供高活性和稳定性.
- 这些发现支持用于各种水电解应用的减少贵金属电催化剂的开发.
- 这项研究强调了高能电池在推进可持续气生产技术方面的潜力.
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