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多金属单原子催化剂用于双功能氧气电催化

Ruisong Li¹, Wenjun Fan², Peng Rao¹

¹State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China.

|September 10, 2023

概括

设计多金属单原子催化剂 (MM-SAC) 是金属空气电池的关键. 新的FeCoCuZn-SAC显示出优异的双功能氧气电催化和空气电池的高性能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

多金属合金在金属空气电池方面表现有前途.
设计多金属单原子催化剂 (MM-SACs) 是一个重大挑战.

研究的目的:

开发一种用于合成MM-SACs的一般方法.
研究MM-SACs用于氧气电催化物的催化活性和耐久性.

主要方法:

一种使用金属C3N4和添加碳的两步合成方法.
氧降解反应 (ORR) 和氧演化反应 (OER) 的电化学测试.
密度函数理论 (DFT) 计算以了解催化机制.

主要成果:

成功合成了三金属的FeCoZn-SAC和四金属的FeCoCuZn-SAC.
FeCoCuZn-SACs表现出优越的双功能ORR和OER活性和耐久性.
DFT的计算突出显示了Co位点在FeCoCuZn-SAC中的作用,以实现高效的催化.
使用FeCoCuZn-SAC的空气电池实现了高功率密度 (252 mW cm−2) 和特定容量 (817 mAh gZn−1).

结论:

开发的方法为MM-SACs合成提供了一个可行的途径.
FeCoCuZn-SACs显示出作为高性能空气电池的正极催化剂的优秀潜力.
这项研究提供了MM-SACs在氧气电催化应用中的优势.

关键词:

在Zn-空气电池电池.这是一种双功能电催化剂.电子互惠是电子互惠的多种金属多种金属一个原子的催化剂.

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