通过电化学激活和NiOOH中的沉/溶解平衡来实现Fe-doping和氧气空缺,用于氧气演化反应
Jing-Yi Xie1, Jie Zhao1, Jun-Qi Han1
1State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
Journal of colloid and interface science
|September 4, 2023
概括
我们开发了一种新的Fe-doped氧化催化剂,用于高效的氧化演化反应 (OER). 这种先进的电催化剂表现出卓越的活性和稳定性,为改进的能量转换技术铺平了道路.
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:
- 氧化氧化具有较差的导电性和不稳定性,限制了它们作为氧化演化反应 (OER) 电催化剂的应用.
- 开发高效和稳定的电催化剂对于推进能源转换技术至关重要.
研究的目的:
- 为了合成和表征一种新型的Fe-doped氧化与氧空缺 (Fe-NiOOH-OV-600) 以提高OER性能.
- 调查Fe doping和氧空缺对催化剂电子结构和活动的协同效应.
主要方法:
- 在泡 (NF) 上的Fe-NiOOH-OV-600的热水合成.
- 使用循环电量计与FeS沉/溶解平衡的电化学激活.
- 描述技术和密度函数理论 (DFT) 计算.
主要成果:
- Fe-NiOOH-OV-600催化剂表现出丰富的含Fe的活性位点和有序的NiOOH结构.
- 铁剂和氧气空缺之间的协同作用优化了电子结构和吸附特性.
- 在低超电位 (253 和 333 mV) 实现高电流密度 (100 和 1000 mA cm-2) 的OER.
- 在500 mA cm-2下,在100多小时内表现出极好的稳定性.
结论:
- Fe-NiOOH-OV-600催化剂代表了OER电催化剂设计的重大进步.
- 这些发现为为可持续能源应用创造高效的过渡金属基电催化剂提供了宝贵的见解.
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