在PEM电解器中用于高效的阳极催化剂的诱导高共价Co-O键
Qisheng Yan1, Jie Feng2, Wenjuan Shi1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 22, 2024
概括
这项研究介绍了用于质子交换膜水电解剂的添加氧化 (CoCr) 催化剂. CoCr催化剂显著提高了氧气演变反应活性和稳定性,这对于高效的绿色生产至关重要.
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:
- 质子交换膜水电解器 (PEMWE) 对于绿色生产至关重要.
- 基于的催化剂昂贵且稀缺,阻碍了PEMWE的可扩展性.
- 氧化物对氧化演化反应 (OER) 是有前途的,但在PEMWE中稳定性差,电压高.
研究的目的:
- 开发一个稳定和活跃的电催化剂用于PEMWE的OER.
- 通过引入兴奋剂来解决PEMWE中的氧化物限制.
- 研究兴奋剂对氧化物催化剂的结构和电子效应.
主要方法:
- 合成添加的旋 (CoCr) 催化剂.
- 在OER期间分析催化剂结构和电子性质的操作特征.
- 理论计算以了解增强开放资源活动的机制.
- 在PEMWE设置中对CoCr催化剂进行电化学测试.
主要成果:
- 兴奋剂稳定了螺旋结构,并增强了Co-O的共价性.
- 激活的Co-O共价性和可适应的氧化还原行为被确定为OER促进的关键因素.
- 与未使用剂的Co3O4 (CoCr) 相比,Cr剂的Co3O4 (CoCr) 的营业额和质量活动增加了八倍.
- CoCr 催化剂实现了高电流密度 (1500 mA cm-2 在 2.17 V) 和表现出极好的耐用性 (>100小时在 500 mA cm-2).
结论:
- 兴奋剂有效调节氧化物的电子结构,从而提高了OER性能.
- 在PEMWE的苛刻环境中,CoCr催化剂显示出实际应用的巨大潜力.
- 这项工作为开发绿色生产的成本效益高,高性能电催化剂提供了一个有前途的战略.
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