表面重建的CdNNi3 抗矿电催化剂:解锁安培级电流密度用于的进化.
Jiaxi Zhang1, Yuanhua Tu1, Longhai Zhang1
1Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
ACS nano
|November 7, 2024
概括
我们开发了一种高导电性反矿CdNNi3电催化剂,用于高效的进化反应 (HER). 这种材料解锁了安培级电流密度,具有出色的活性和耐用性,最大限度地降低了欧姆损失.
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:
- 催化剂层中的欧姆损失阻碍了大电流密度演化反应 (HER) 的效率.
- 开发具有高导电性的电催化剂对于克服这一局限性至关重要.
研究的目的:
- 选和评估一种高导电性反矿材料CdNNi3,作为HER的高效电催化剂.
- 为了研究在安培级电流密度下CdNNi3的性能和稳定性.
- 探索性HER期间的表面重建现象.
主要方法:
- 对抗矿材料的计算选.
- 对HER的CdNNi3的电化学表征.
- 阳离子交换膜水电解器的制造和测试.
- 使用密度函数理论 (DFT) 的理论分析.
主要成果:
- CdNNi3表现出高导电性和微不足道的欧姆损耗,作为一个活跃和持久的HER电催化剂.
- 在1A cm-2时达到235mV的超电位,持续性能超过400小时.
- 基于CdNNi3的电解仪在1A cm-2.2时显示电池电压比Pt/C低160mV.
- 发现了抗矿亚化物的动态表面重建,Cd优化活性位点以增强 HER.
结论:
- 抗矿CdNNi3是大电流密度HER的有希望的电催化剂,可显著降低欧姆损耗.
- 该材料的性能归因于其导电性和动态表面重建,这有助于水分离.
- 对于高效生产的贵金属催化剂,CdNNi3提供了一个可行的替代品.
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