相关实验视频

Updated: May 3, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

通过两步方法创建有利的Pt/Co接口,以构建高耐用性PtCo金属间燃料电池催化剂

Jiashun Liang¹, Haoran Yu², Michael J Zachman²

¹Department of Energy, Environmental, & Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.

Advanced materials (Deerfield Beach, Fla.)

|August 23, 2025

概括

一种新的两步合成产生了高度排序的L12-Pt3Co催化剂. 这种方法增强了质子交换膜燃料电池 (PEMFC) 的分散和活性,在重型车辆条件下显示出出色的耐用性.

科学领域:

材料科学
电化学
催化剂

背景情况:

结构上有序的PtCo间金属是质子交换膜燃料电池 (PEMFC) 的有希望的催化剂.
高温合成导致粒子聚合,降低了催化剂的性能.
现有的方法难以平衡高排序与良好的颗粒分散性和稳定性.

研究的目的:

开发一个两步合成L12-Pt3Co金属间的高排序和分散的超细颗粒.
提高PEMFC的催化活性和耐用性,特别是在重型车辆条件下.
克服高温合成的局限性,以实现有序的金属间催化剂.

主要方法:

一个两步合成,涉及ZIF-8衍生碳支器上的Pt纳米颗粒的初始分散.
用氨基酸进行第二个吸附步骤以调整Pt-Co接口并促进Co扩散.
通过温和的热处理 (<800°C) 形成有序的L12-Pt3Co结构.
在重型车辆 (HDV) 模拟条件下使用膜电极组件进行评估.

主要成果:

成功合成了L12-Pt3Co金属间结构,并增加了排序度和分散的超细颗粒.
与PtCo固体溶液合金相比,实现了增强的催化活性和稳定性.
在HVD条件下,经过15万次电压循环后,仅在0.7V下损失7%,保持1.35A cm-2.

结论:

开发的两步合成有效生产高度有序,稳定和活跃的L12-Pt3Co催化剂.
这种方法克服了与传统高温方法相关的粒子聚合问题.
催化剂在PEMFC中具有很大的实际应用潜力,特别是在苛刻的HV使用中.

关键词:

其他国家在PEMFC PtCo 催化剂电催化重型车辆

更多相关视频

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

Published on: March 16, 2018

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

相关概念视频

Heterogeneous Catalysis

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...