原子对原子优化Fe-Pt金属间催化剂的表面终结,用于性演化反应
Qing Liang1, Fanling Meng1, Wenwen Li1
1Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Electron Microscopy Center, International Center of Future Science, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, China.
高排序的FePt3金属间催化剂显示了性演化反应 (HER) 的增强性能. 控制原子排列优化了表面特性,导致了更高的催化活性和稳定性.
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
- 催化剂是一种催化剂.
背景情况:
- 控制金属间催化剂中的原子排列是电催化反应的关键.
- 为演化反应 (HER) 优化 (Pt) 催化剂通常涉及引入铁 (Fe) 等元素.
- 在从无序的Fe/Pt合金过渡到有序的金属间化合物 (IMCs),如FePt3对于性HER而言,存在一个差距.
研究的目的:
- 为性HER合成和研究订购的FePt3金属间化合物.
- 探索原子排列数量级对催化性能的影响.
- 了解FePt3催化剂的表面特性和稳定性.
主要方法:
- 在碳纳米管 (CNT) 上通过浸合成FePt3-xH催化剂 (x=5-9).
- 热处理,包括减少大气的化,以控制Fe/Pt原子顺序.
- 先进的显微镜和光谱用于系统的表征.
主要成果:
- FePt3-8H催化剂显示出优异的HER活性,具有较低的超电位 (37mV在10mA cm-2在1.0M KOH).
- 订购的L12 FePt3-8H催化剂的表面被发现富含Pt.
- 表面的Pt由于独特的Fe/Pt协调而表现出增强的抗氧化稳定性.
结论:
- FePt3 的数量级显著影响了 HER 的表现.
- 富含Pt的表面在有序FePt3中具有特定的Fe/Pt协调,增强了催化活性和稳定性.
- 订购的FePt3 IMC是性HER的有希望的电催化剂.
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