用于性燃料电池的金属-有机-框架衍生的Co-Fe双金属氧降解电催化剂
Yin Xiong1, Yao Yang1, Francis J DiSalvo1
1Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States.
Journal of the American Chemical Society
|June 28, 2019
概括
开发先进的电催化剂是清洁能源的关键. 这项研究提出了一种新型的非贵金属催化剂,用于氧降解反应 (ORR),该催化剂在燃料电池和电解剂中具有高活性和耐用性.
科学领域:
- 电化学
- 材料科学
- 纳米技术
背景情况:
- 氧降解反应 (ORR) 对燃料电池和电解器等再生能源设备至关重要.
- 开发具有成本效益的非贵金属电催化剂对于这些技术的商业化至关重要.
研究的目的:
- 设计和合成基于碳纳米复合材料的新型双金属有机框架 (BMOF),以实现高效的ORR催化.
- 在性介质中研究合金嵌入式BMOF的电催化性能和耐久性.
主要方法:
- 在BMOF中嵌入Co-Fe合金纳米颗粒的宿主-客人合成策略.
- 使用循环电压测量和旋转盘电极测量等技术进行电化学表征.
- 使用扫描传输电子显微镜 (STEM) 和能量分散X射线 (EDX) 光谱技术进行先进的材料分析.
主要成果:
- Co-Fe/BMOF电催化剂表现出高ORR活性,其半波电位为0.89V/0.1M NaOH,与基催化剂相比.
- 观察到异常耐用性,催化剂在3万次潜在循环后保持性能.
- 在BMOF结构中,STEM-EDX分析证实了Co和Fe在优化9:1的均分布.
结论:
- 开发的嵌入式 Co-Fe BMOF 作为一种高度活跃和耐用的非贵金属电催化剂,用于性介质中的氧降解反应.
- 这项研究强调了结构优化的双金属框架在推进清洁能源技术方面的潜力.
- 这项研究为设计下一代无组金属ORR电催化剂提供了宝贵的见解.
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