在质子陶电化学电池上使用高效的三功能脊柱式电极进行氧降低/进化反应和非氧化乙脱
Yangsen Xu1, Hua Zhang1, Kang Xu1
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Advanced materials (Deerfield Beach, Fla.)
|August 28, 2024
概括
用于质子陶电化学电池 (PCEC) 的新三功能电极使高效的发电和化学生产成为可能. 基于Mn-Co的电极在燃料电池和电解模式中表现出色的性能和稳定性,包括乙转化为乙烯.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 质子陶电化学电池 (PCEC) 是直接发电和化学生产的有希望的.
- 开发具有三功能的电极 (氧气减少/进化和乙脱) 是一个重大挑战.
研究的目的:
- 设计和研究用于PCEC的新型三功能电极.
- 为了评估这些电极的电化学性能和稳定性.
主要方法:
- 一个基于Mn-Co的复合电极的合成 (MCCO-CO,质量比为8:2).
- 在燃料电池 (FC) 和电解电池 (EC) 模式下进行电化学表征.
- 测试乙脱的乙烯和生产.
主要成果:
- MCCO-CO 电极表现出较低的面积特异性电阻 (0.382 Ω cm2 在 600 °C) 和良好的稳定性 (≈105 h).
- 单电池实现了1.73W cm−2 (FC模式) 的峰值功率密度,并在700°C处在1.3V (EC模式) 时实现了-3.93A cm−2的电流密度.
- 在FC (223小时) 和EC (209小时) 模式和在650°C的可逆循环 (52个循环,208小时) 中经过稳定运行.
- 在700°C时实现了40.3%的乙转化为乙烯 (94%的选择性) 和高H2生产率 (4.65mLmin-1cm-2).
结论:
- 开发的三功能MCCO-CO电极显示了PCEC的优秀潜力.
- 电极促进了高效的发电,化学生产,并表现出强大的稳定性.
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