在CoP多异质连接微球上对CeO2的电子调节,以实现高效的水氧化
Jiahui Jiang1, Bingbing Gong2, Guancheng Xu1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.
Journal of colloid and interface science
|April 26, 2024
概括
二氧化 (CeO2) 增强了氧化演化反应 (OER) 的化 (CoP) 电催化剂. 这项研究揭示了CeO2 .
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:
- 过渡金属化物 (TMP) 是一个有前途的电催化剂.
- 已知二氧化 (CeO2) 可以增强TMP的电催化活性.
- 在TMP中CeO2增强的确切机制尚未完全理解.
研究的目的:
- 为了开发一个CeO2-CoP多层微球异构结构催化剂.
- 阐明CeO2增强电催化活性的机制.
- 为改善氧化演化反应 (OER) 性能提供对催化剂设计的见解.
主要方法:
- 水热合成和化以产生CeO2-CoP-1-4催化剂.
- 对OER性能进行电催化测试 (超电位,电流密度,耐用性).
- 在现场拉曼,现场表征和密度函数理论 (DFT) 计算.
主要成果:
- CeO2-CoP-1-4催化剂在254mV的超电位下实现了10mA cm-2.
- 催化剂表现出极好的耐用性,运行55小时.
- CeO2 调节了 CoP 结构,改善了活跃站点利用率,并优化了电子结构.
结论:
- CeO2充当了共催化剂,增强了COP对OER的电催化活性.
- 多的微球结构促进了质量转移和积极的网站利用.
- CeO2 修改了 Co 种类的电子结构,降低了限制速率阶段的能量屏障.
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