用于氧降解催化剂的PdMo二甲
Mingchuan Luo1,2, Zhonglong Zhao3, Yelong Zhang1
1Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China.
Nature
|September 27, 2019
概括
一种新型的- (PdMo) 双金属催化剂有效地驱动电解质中的氧减和演化反应. 这一突破为可再生能源应用和先进电池提供了稳定,高性能的替代方案.
科学领域:
- 材料科学
- 电化学
- 可再生能源
背景情况:
- 电催化过程对于可再生能源至关重要,但缓慢的氧减少 (ORR) 和氧进化 (OER) 动力学是主要的挑战.
- 类金属催化剂通常需要高活性,但在性介质中价格昂贵且效率较低.
研究的目的:
- 在性电解质中开发高活性和稳定的ORR和OER电催化剂.
- 探索-二甲 (PdMo) 作为 Zn-空气和 Li-空气电池的阴极材料的潜力.
主要方法:
- 合成PdMo双金属,一个亚纳米厚的,高度曲的金属纳米板.
- 在性电解质中对PdMo双甲的ORR和OER活性和耐久性的电化学表征.
- 密度函数理论 (DFT) 计算以了解结构-活动关系.
主要成果:
- PdMo二甲具有高质量活性 (16.37A/mg Pd为ORR) 和超过30,000个周期的稳定性.
- 获得的质量活性明显高于商业Pt/C和Pd/C催化剂.
- DFT计算表明由于合金,应变和量子尺寸效应而优化氧结合.
结论:
- 在性介质中,PdMo二甲是ORR和OER的有希望,高效和稳定的电催化剂.
- 它的独特结构和电子特性为改进的能量储存和转换设备提供了途径.
- 金属材料代表了能源电催化剂的新一类有希望的催化剂.
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