聚烯调节了直接化燃料电池中的共基催化剂中的活性位点
Lin Kang1, Cheng Liu2, Jinyu Ye3
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China.
ChemSusChem
|December 15, 2023
概括
催化剂的聚烯基改性增强了直接化燃料电池 (DBFC) 通过改善电化学化氧化反应 (eBOR). 这种新的Co-PX催化剂为清洁能源转换提供了卓越的性能和稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 直接化燃料电池 (DBFC) 对清洁发电具有前景.
- 在NaBH4溶液中的催化剂停用阻碍了DBFC的性能和稳定性.
研究的目的:
- 开发一种策略,用于调节基于Co的催化剂中的活性位点,用于增强电化学化氧化反应 (eBOR).
- 为了提高DBFCs的性能和稳定性,使用一种新型的聚烯基改性催化剂.
主要方法:
- 合成一种多聚醇改性催化剂 (Co-PX).
- 在DBFCs中的催化剂的电化学表征.
- 在现场电化学减弱总反射里埃变换红外光谱学 (ATR-FTIRS).
- 密度函数理论 (DFT) 的计算.
主要成果:
- Co-PX催化剂的电流密度为280 mA·cm−2和功率密度为151 mW·cm−2,几乎是未经修改的催化剂的两倍.
- Co-PX催化剂表现出极好的稳定性,经过120小时的运行后没有观察到任何降解.
- ATR-FTIRS和DFT研究表明,聚醇修饰优化了催化剂表面上的电荷分布和中间吸附/脱附.
结论:
- 聚醇修饰是一种有效的策略,可以增强DBFC中EBOR的Co基催化剂的催化活性和稳定性.
- 在下一代DBFC中,Co-PX催化剂为高效的聚合物调制催化剂提供了有希望的进步.
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
22.1K
08:40Synthesis 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
3.6K
相关概念视频
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.7K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.7K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K