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装饰和重建的矿氧化物电极用于氧气电催化和 Zn-空气电池

Guichan Chen¹, Jiapeng Liu², Dengjie Chen¹

¹College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China.

Journal of colloid and interface science

|September 11, 2024

概括

这项研究引入了一种快速的电化学方法,用于增强氧化演化反应 (OER) 的LaNiO3催化剂. 修改后的催化剂显著提高了性能和耐用性,使其对能源应用具有前景.

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:

装饰的纳米粒子提供了增加活性位点的潜力,但通常需要复杂的准备.
开发有效和简单的催化剂增强方法对于实际应用至关重要.

研究的目的:

展示一个易于在现场进行的电化学操纵,以提高氧化演化反应 (OER) 的LaNiO3催化剂性能.
研究由电化学修饰引起的结构和化学变化及其对OER活动的影响.

主要方法:

在含Fe3+的KOH溶液中对LaNiO3进行电化学处理.
使用实验和理论技术,对原始和改性催化剂进行表征.
评估OER活动和持久性.
使用修改后的催化剂组装和测试Zn-空气电池.

主要成果:

经过电化学处理的LaNiO3 (E-LNO+Fe) 与原始的LaNiO3.3相比,在1.65V时电流密度增加了近三倍.
电化学操纵产生了有缺陷的LaNiO3-δ和NiO,加速了相变为 (氧) 氧化物.
修改后的催化剂在Zn-空气电池中表现出更高的活性,达到171mW cm-2.2.

结论:

在现场进行电化学改造是一种有效和简单的策略,可以提高矿氧化物电极的性能.
开发的方法提供了一条途径,可以显著提高OER的催化剂活性和耐用性.
这种方法对推进电化学能量转换技术具有前景.

关键词:

动态稳定性动态稳定性电化学操纵是一种电化学操纵.在现场激活.氧的演化反应反应的反应.矿氧化物矿氧化物

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