增强高价值CoOOH的氧化演化反应活性和稳定性,通过注低价值Cu来切换催化途径
Yi Zhou1, Junhao Zeng2, Xuerong Zheng3
1Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, PR China.
Journal of colloid and interface science
|September 21, 2024
概括
将低价值铜引入氧化 (Cu$_{x}$Co$_{1-x}$OOH) 便于在氧化演化反应 (OER) 机制之间切换,增强催化活性和能量储存的稳定性.
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:
- 氧化演化反应 (OER) 对于能量储存和转化至关重要.
- 吸附物进化机制 (AEM) 是稳定的,但动态缓慢.
- 晶格氧化机制 (LOM) 提供了更快的动力学,但很难激活.
研究的目的:
- 通过结合AEM和LOM路径来增强OER的催化活性和稳定性.
- 为了克服激活LOM的挑战,由于晶格氧的高热力学屏障.
- 通过路径切换来设计高效和稳定的电催化剂.
主要方法:
- 理论计算和实验验证.
- 在氧化 (Cu$_{x}$Co$_{1-x}$OOH) 中引入低价值铜.
- 调节CoO键的局部协调环境以激活网状氧.
主要成果:
- Cu$_{x}$Co$_{1-x}$OOH激活了网状氧气,并产生了氧气空缺.
- 通过增加电压,方便从AEM切换到LOM路径.
- 在10 mA cm$^{-2}$时达到252 mV的突出超电位,在280h后只有2.80%的降解.
结论:
- 在CoOOH中通过Cu-doping将AEM和LOM路径结合起来,可以提高OER性能.
- 该战略为设计高效和稳定的电催化剂提供了一种新的方法.
- 该Cu$_{x}$Co$_{1-x}$OOH催化剂显示出OER的优越活性和耐用性.
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