--碳支持提升高效质子交换膜燃料电池中的白金催化
Yuanxin Chen1,2,3, Zihan Meng2, Xuelin Wei1,2,3
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China.
Angewandte Chemie (International ed. in English)
|September 11, 2025
概括
使用和共介 graphitized mesoporous carbon (Te-N-GMC) 的新型电催化剂显著提高了燃料电池的效率和耐用性,用于高压条件下的氧降解反应 (ORR).
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:
- 燃料电池的效率取决于在高压条件下优化氧降解反应 (ORR).
- (Pt) 催化非常重要,但在高电压下容易降解.
- 开发强大的基于Pt的电催化剂对于先进的燃料电池技术至关重要.
研究的目的:
- 开发和描述一种用于提高高压氧降解反应 (ORR) 性能的新型电催化剂.
- 调查和联合介导的石墨化半孔碳 (Te-N-GMC) 支在稳定Pt纳米颗粒中的作用.
- 与商业替代品相比,评估新催化剂的活性,耐用性和效率改进.
主要方法:
- 在Te-N-GMC支上固定Pt纳米颗粒的合成,具有高Pt负载 (40%重量).
- 使用密度函数理论 (DFT) 计算和操作式X射线吸收光谱的表征.
- 在高压循环条件下 (1-1.5V) 进行电化学测试,采用H2-空气燃料电池设置.
主要成果:
- Te-N-GMC支形成强大的 Pt─Te 和 Pt─N 键,通过电子反转移增强 Pt 氧化电阻.
- 在高压应力下,Pt价值状态显示最小的变化 (+0.085),确保了超过10万个周期的特殊耐用性.
- 与商业Pt/C相比,催化剂实现了更高的活性 (0.7 V在1.26 A cm-2),电效率提高了18.6%.
结论:
- Te-N-GMC 是一个有前途的支材料,用于制造高压ORR的强大的催化剂.
- 这项研究表明了提高燃料电池中Pt催化稳定性和效率的可行策略.
- 这一进步有可能开发下一代高效的燃料电池系统.
更多相关视频
12:12On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
Published on: March 16, 2018
22.8K
10:15Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
Published on: November 7, 2025
489
相关概念视频
03:12Batteries and Fuel Cells
30.7K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.7K
02:50Catalysis
30.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.1K
01:19Turnover Number and Catalytic Efficiency
20.3K
The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
20.3K