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热响应的Rh₁-Pd单原子催化剂用于控制直接酸燃料电池中的活性

Keying Su¹, Shan Yang¹, Yujia Liang¹

¹Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, China.

Nature communications

|December 13, 2025

概括

我们开发了智能单原子Rh-Pd纳米板,通过温度控制电催化活动. 这些催化剂对酸反应具有高活性和抗毒性,并为燃料电池提供智能热保护.

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:

单原子催化剂具有高活性,但缺乏活性.
聪明的聪明的聪明的聪明的聪明
像热响应度这样的属性.
在单原子催化剂中实现可控的催化活性仍然是一个挑战.

研究的目的:

设计具有温度控制的电催化活性的热敏单原子Rh-Pd纳米薄膜 (NS).
为了利用氨基功能化聚 ((N-异烯胺) 作为催化剂活性控制的热响应门.
研究这些智能催化剂在直接酸燃料电池 (DFAFC) 中的应用.

主要方法:

热敏单原子Rh-Pd纳米片的合成.
使用酸电氧化作为模型反应的电催化试验.
现场光谱学和理论计算,以了解催化机制.
直接酸燃料电池 (DFAFC) 的性能评估.

主要成果:

热敏感的Rh-1-Pd NSs表现出高质量活性 (2.29 A mg-PGM-1) 和强烈的中毒抗性.
在较低的临界溶液温度 (LCST) 35°C时观察到可逆热反应性.
催化剂有利于直接形式的途径,削弱了自我毒性物种的结合.
带有这些NS的DFAFC在LCST以下显示出高功率密度,在LCST上方显示出急剧的功率下降,从而实现智能热保护.

结论:

热敏单原子Rh-Pd NSs可以通过热响应门设计具有可控制的电催化活性.
这些智能催化剂在酸电氧化过程中表现出卓越的性能和抗自我中毒特性.
开发的材料为直接酸燃料电池 (DFAFC) 提供智能热保护.

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