在化碳支器上的催化剂上进行水相改革:探索-异原子相互作用
Monica Pazos Urrea1, Simon Meilinger1, Felix Herold1
1Department of Chemical Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
ACS catalysis
|March 21, 2024
概括
化碳纳米纤维上的白金催化剂显示,从乙烯基醇改制中产生优异的. 这是由于增强的分散和催化剂基本性,通过现场X射线吸收光谱证实了这一点.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 碳的异原子兴奋剂支持影响催化剂性能.
- 了解当地的环境对于优化催化活性至关重要.
研究的目的:
- 在异原子合碳纳米纤维上合成和表征催化剂.
- 研究兴奋剂对的局部环境和在乙烯基醇 (EG) 水相改造 (APR) 中的催化性能的影响.
主要方法:
- 在各种异原子合碳纳米纤维 (N,S,B,P) 上合成催化剂.
- 在现场的X射线吸收光谱 (XAS) 与多变量曲线分辨率交替最小平方 (MCR-ALS) 分析.
- 乙烯糖醇 (EG) 的水相改造 (APR) 以评估H2的生产和选择性.
主要成果:
- 添加剂催化剂的H2产量最高 (22.7h-1),这是由于高Pt分散和基本性,并确定了Pt-N-O协调.
- 硫化催化剂显示出最低的EG转化和最小的气体产量,其中Pt-S贡献.
- 用添加剂的催化剂有利于酒精选择性,与酸位和Pt-P贡献有关.
结论:
- 当地的环境受到碳支持兴奋剂的影响,显著影响EG-APR中的催化活性和选择性.
- 兴奋剂为H2生产创造了最佳条件,而兴奋剂提高了液相酒精的选择性.
- 在现场XAS有效地阐明了催化剂结构和性能之间的关系.
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