鲁 - 固体溶液氧化物,用于酸性和性氧气演化反应的增强性能
Wen Sun1,2, Ying Fang1,2, Gaoming Sun1,2
1College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
Chemistry, an Asian journal
|June 28, 2023
概括
一种具有多孔结构的新型鲁-氧化物 (Ru$_{0.75}$Mn$_{0.25}$O$_{2-δ}$) 催化剂通过水电解增强了的生产. 这种多功能催化剂在酸性和性条件下显示出更好的动力学和耐用性.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 通过水电解产生对于清洁能源至关重要,但面临着缓慢的氧演化反应 (OER) 动力学和电催化剂耐用性有限的挑战.
- 现有的质子交换膜电催化剂和交换膜水电解剂的电催化剂的性能和稳定性往往不佳,阻碍了高效的生成.
研究的目的:
- 为氧化演化反应 (OER) 开发一种高效,耐用的电催化剂,适用于水电解的酸性和性电解质.
- 为了研究一个鲁 Ru$_{0.75}$Mn$_{0.25}$O$_{2-δ}$固溶液氧化物的结构和组成对OER性能的影响.
主要方法:
- 一个层次性的多孔的路氧化物Ru$_{0.75}$Mn$_{0.25}$O$_{2-δ}$固溶液的合成.
- 催化剂在酸性 (0.5 M H$_{2}$SO$_{4}$) 和性电解质中的OER活性和耐久性的电化学特征.
- 催化剂的性能与商业 RuO$_{2}$ 的比较.
主要成果:
- Ru$_{0.75}$Mn$_{0.25}$O$_{2-δ}$催化剂在酸性介质中表现出优异的OER动力学,其低Tafel斜率为54.6 mV dec^{-1}$,超电位低 (237 mV在10 mA cm$^{-2}$,327 mV在100 mA cm$^{-2}$).
- 由于纳入Mn (调节Ru$^{>4+}$比例),增加了电化学活性表面积和增加了内在活性,这有助于提高性能.
- 催化剂在性电解质中表现出色的OER性能和耐用性,这归因于Mn的牺牲溶解减轻了Ru的泄.
结论:
- 层次性的多孔鲁 Ru$_{0.75}$Mn$_{0.25}$O$_{2-δ}$ 固体溶液氧化物是氧化演化反应的高效和耐用电催化剂.
- 这种多功能催化剂为提高酸性和性水电解系统中的气生产效率提供了一个有希望的解决方案.
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