一块石头的两只鸟:同时提高OER催化活性和稳定性双相中金属硫化物
Fengqi Li1, Hao Wu1, Shaochen Lv2
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|October 27, 2023
概括
一种新的双相中金属硫化物 (FeCoNiMn2) S2被合成,以增强氧演化反应 (OER) 电催化剂的稳定性. 这种新材料在气电池中表现出卓越的性能,为能量转换应用提供了潜力.
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:
- 过渡金属硫化物是氧化演化反应 (OER) 的有希望的电催化剂.
- 目前的过渡金属硫化物催化剂缺乏大型商业应用所需的稳定性.
研究的目的:
- 制造和表征一种新的双相中金属硫化物 (dp-MEMS),以提高OER稳定性.
- 评估可充电Zn-空气电池中新材料的催化活性和性能.
主要方法:
- (FeCoNiMn2) S2 dp-MEMS 的合成.
- 对OER性能进行电化学测试 (超电位,电流密度).
- 密度函数理论 (DFT) 计算以了解增强机制.
- 可充电Zn-空气电池的整合和测试.
主要成果:
- 合成的 (FeCoNiMn2) S2 dp-MEMS 显示出对OER的增强稳定性.
- 在10 mA cm−2时达到169 mV的低超电位,在100 mA cm−2.2时达到232 mV.
- 与商业催化剂 (Pt/C+RuO2) 相比,可充电Zn-空气电池的表现更优.
结论:
- 双相中金属硫化物为开发高度稳定和高效的OER电催化剂提供了一个有希望的途径.
- 中等系统中类似"细胞壁"的结构和协同效应有助于增强催化活性和稳定性.
- (FeCoNiMn2) S2 dp-MEMS对开放式电源和相关的能量转换系统具有重大潜力.
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