Pd-丰富的核心/Pt-丰富的外高合金,面中心立方结构为C.
Xianzhuo Lao1, Xuejiang Liao1, Chen Chen1
1Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China.
高合金纳米粒子 (HEA NPs) 具有独特的催化性能. 这项研究合成了PdAgSn/PtBi HEA NP,证明了甲醇和乙醇氧化反应的优越性能和耐久性.
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
- 纳米技术纳米技术
背景情况:
- 高合金纳米粒子 (HEA NPs) 以其独特的电化学,催化和机械性能而闻名.
- 它们的多元素调性使得它们适合复杂的多步反应.
研究的目的:
- 开发一种简单的低温合成方法,用于生产Pd-丰富的HEA核心和Pt-丰富的HEA外纳米粒子.
- 调查这些新型HEANP的氧化反应的结构性质和电催化性能.
主要方法:
- 采用了低温大气压合成方法.
- 合成的纳米颗粒因其结构相和晶格特性而具有特征.
- 评估了甲醇氧化反应 (MOR) 和乙醇氧化反应 (EOR) 的电催化活性和耐久性.
主要成果:
- 单相面中心立方结构HEANP (PdAgSn/PtBi) 已成功合成.
- 在HEA的NP中,出现了带有拉伸应变的扩大格子结构.
- 与商业催化剂相比,PdAgSn/PtBi HEA NP 显示了MOR 和 EOR 的显著增强的电催化活性和耐久性.
- MOR的特定活性为4.7 mA cm-2 (2874 mA mg(Pd+Pt) -1),表现优于Pd/C和Pt/C.
结论:
- 合成的HEA NP显示了电催化应用的巨大潜力,特别是在MOR和EOR中.
- 在HEA接口上的Pt和Pd位点之间的协同效应提高了催化性能.
- 这项工作为可扩展的HEA NP制造提供了一个可行的途径,具有有前途的应用.
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