双金属碳化物纳米复合物增强Pt催化剂具有高活性和稳定性,用于氧降解反应
Xueming Ma1, Hui Meng, Mei Cai
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, 135 Xingang Road, Guangzhou 510275, PR China.
Journal of the American Chemical Society
|January 24, 2012
概括
研究人员在石墨碳 ((g) C) 上开发了新的-碳化物 (Co(6) Mo(6) C(2)) 纳米复合材料. 这些材料增强了燃料电池的基催化剂,改善了活动并降低了成本.
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
- 纳米技术 纳米技术
背景情况:
- 开发具有成本效益和高效的电催化剂对于燃料电池技术至关重要.
- 基催化剂是有效但昂贵的,推动了对替代品和支持的研究.
- 纳米结构材料为催化应用提供了独特的特性.
研究的目的:
- 在石墨碳 ((g) C) 纳米复合材料上支持的新型双金属碳化物Co(6) Mo(6) C(2) 的合成和特征.
- 为了评估纳米颗粒的性能,这些Co(6) Mo(6) C(2)/(g) C纳米复合材料作为氧降解反应 (ORR) 的电催化剂.
- 为了比较催化活性和稳定性与商业在碳 (Pt/C) 催化剂.
主要方法:
- 使用离子交换方法在现场合成Co(6) Mo(6) C(2) /(g) C纳米复合材料.
- 将纳米粒子加载到合成的Co(6)Mo(6)C(2)/(g) C支器上.
- 在酸性介质中进行氧降解反应的产生的Pt-Co(6)Mo(6)C(2)/(g) C催化剂的电化学评估.
主要成果:
- 合成的Co ((6) Mo ((6) C ((2) / ((g) C纳米复合材料表现出极好的化学和电化学稳定性.
- 与商业Pt/C相比,Pt-Co6Mo6C2gC催化剂对ORR表现出更高的活性和稳定性.
- 增强的质量活动表明,可能减少所需的金量,降低燃料电池成本.
结论:
- 新型Co(6)Mo(6)C(2)/(g) C纳米复合材料是电催化剂的一个有前途的支材料.
- 这一发展为更具成本效益和高性能燃料电池催化剂提供了途径.
- 合成方法为开发用于各种应用的其他纳米结构材料提供了基础.
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