A/B-Site管理策略,以促进性介质中的矿氧化物对电催化总体水分解
Ya-Nan Zhao1, Changhai Liu1, Siqi Xu1
1School of Materials Science and Engineering, CNPC-CZU Innovation Alliance, Changzhou University, Changzhou 213164, Jiangsu, China.
Inorganic chemistry
|July 22, 2023
概括
矿氧化物Pr0.7Sr0.3Co1-RuO3 矿氧化物显示出作为进化反应 (HER) 和氧进化反应 (OER) 的双功能催化剂的前景. 优化的兴奋剂提高了它们对整体水分的性能.
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:
- 矿氧化物是能量转化反应的有希望的电催化剂.
- 开发高效的双功能催化剂,用于和氧的演化反应,对于水分技术至关重要.
研究的目的:
- 为了合成和描述Pr0.7Sr0.3Co1-RuO3矿氧化物作为双功能催化剂.
- 研究演化反应 (HER) 和氧演化反应 (OER) 的电催化活性和耐久性.
- 探索A和B位点阴离子兴奋剂对矿类型双功能电催化剂性能的影响.
主要方法:
- 太阳凝合成Pr0.7Sr0.3Co1-RuO3的矿氧化物.
- 电化学表征包括超电位,Tafel斜率,电化学活性面积和电荷转移电阻测量.
- 整体的水分性能评估.
- 活跃地点和表面氧气空缺的分析.
主要成果:
- 合成的Pr0.7Sr0.3Co1-RuO3 (PSCR0.05) 在性介质中在10 mA cm-2时显示出HER (319 mV) 和OER (321 mV) 的低超电位.
- PSCR0.05表现出有利的Tafel斜率 (HER: 87.32 mV/dec,OER: 118.1 mV/dec),大电化学活性面积,以及最小的电荷转移阻力.
- 催化剂显示出优异的长期耐用性,并实现了1.77V的电池电压在10mA cm-2的整体水分裂.
- 超级交换相互作用和增加的表面氧空缺/活性位点 (Co2+/Co3+/Ru3+/Ru4+/O2-/OO) 有助于提高性能.
结论:
- 矿氧化物Pr0.7Sr0.3Co1-RuO3是HER和OER的有效双功能电催化剂.
- 甲点和乙点阴离子兴奋剂是一种可行的策略,可以优化矿类材料的电催化性能.
- 这项工作为设计用于水分裂的先进矿基双功能电催化剂提供了新的见解.
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