PtMo合金和MoO(x) @Pt核心外纳米颗粒作为高耐碳电催化剂
Zhufang Liu1, Jenny E Hu, Qi Wang
1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
Journal of the American Chemical Society
|May 21, 2009
概括
新的- (PtMo) 合金和核心外纳米粒子催化剂表现出增强的一氧化碳 (CO) 耐受性. 这些先进的催化剂显示出用于质子交换膜燃料电池的前景.
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:
- 质子交换膜燃料电池 (PEMFC) 是一个有前途的清洁能源技术.
- 基电催化剂的一氧化碳 (CO) 中毒仍然是PEMFC耐用性和性能的一个重大挑战.
- 耐碳排放的阳极催化剂的开发对于推进燃料电池技术至关重要.
研究的目的:
- 为了合成和描述新的 - (PtMo) 合金和氧化物@ (MoO(x) @Pt) 核心外纳米粒子 (NP).
- 评估这些新型NP作为PEMFCs的阳极催化剂的CO耐受性和电催化活性.
- 将它们的性能与商业- (PtRu) 和 (Pt) 催化剂进行比较.
主要方法:
- 通过化学联合减少合成PtMo合金NP.
- 通过顺序化学还原合成MoO(x) @Pt核心外NP.
- 用于PEMFC阳极应用的碳支持催化剂的电化学表征.
- 通过电化学测试来评估CO耐受性.
主要成果:
- 成功合成了碳支持的PtMo合金和MoO(x) @Pt核心外NP.
- 这两种新型纳米催化剂与商业E-TEK PtRu合金和Pt催化剂相比,显示出明显更高的CO耐受性.
- 增强的二氧化碳耐受性表明,燃料流中的二氧化碳杂质对中毒的抵抗力得到了改善.
结论:
- PtMo合金和MoO(x) @Pt核心外NP代表了耐碳酸阳极电催化剂的非常有前途的候选人.
- 这些新型纳米催化剂有可能显著提高质子交换膜燃料电池的长期性能和耐用性.
- 对其在运行燃料电池系统中的应用进行进一步研究是有必要的.
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