核心/外 Pd/FePt纳米颗粒作为氧降解反应的活性和耐用催化剂
Vismadeb Mazumder1, Miaofang Chi, Karren L More
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Journal of the American Chemical Society
|May 26, 2010
概括
我们合成了核心/外/铁纳米颗粒用于氧降解反应. 一个薄的1纳米铁外显著提高了燃料电池的催化剂耐用性和活性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 电化学 电化学 电化学
背景情况:
- 开发高效的催化剂对于推进燃料电池技术至关重要.
- 基于 (Pd) 和 (Pt) 的纳米材料是燃料电池催化过程中的关键组成部分.
- 了解核心/外纳米粒子结构可以优化催化性能.
研究的目的:
- 为了合成核心/外/铁 (Pd/FePt) 纳米粒子.
- 调查这些纳米颗粒的催化活性和耐用性,以进行氧降解反应 (ORR).
- 为了确定FePt外厚度对催化性能的影响.
主要方法:
- 在盐的存在下,对铁五乙烯基[Fe(CO) 5]在纳米颗粒上进行受控核化.
- 在特定的反应温度下进行合成,以实现均的FePt外形成.
- 电化学测试,以评估氧降解反应 (ORR) 的活性和耐久性.
主要成果:
- 成功合成了具有均FePt外的核心/外 Pd/FePt纳米粒子.
- 催化性能取决于FePt外的厚度.
- 与3nm外相比,具有1nmFePt外的Pd/FePtNP显示活动增加了15倍,发作潜力增加了140mV.
- 在优化的FePt外中观察到更强的耐用性.
结论:
- 核心/外 Pd/FePt纳米粒子为改进的燃料电池催化剂提供了一个有希望的途径.
- 优化FePt外厚度对于最大限度地提高催化效率和寿命至关重要.
- 这些新型纳米粒子具有实际燃料电池应用的潜力.
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