高效的脱催化剂使用来自单点的支持的Ga-Pt纳米粒子
Keith Searles1, Ka Wing Chan1, Jorge Augusto Mendes Burak1
1ETH Zürich, Department of Chemistry and Applied Biosciences, Vladimir Prelog Weg 1-5 , ETH Zürich , CH-8093 Zurich , Switzerland.
Journal of the American Chemical Society
|August 28, 2018
概括
开发脱的新催化剂对于从页岩气中生产烯至关重要. 这项研究引入了一种新的- (Ga-Pt) 双金属催化剂,在脱中表现出优异的性能.
科学领域:
- 不同质的催化
- 表面有机金属化学
- 材料科学
背景情况:
- 有效的脱催化剂对于将页岩气转化为有价值的烯是必不可少的.
- 现有的催化剂在活动,选择性和稳定性方面经常面临挑战.
- 表面有机金属化学为设计先进的催化材料提供了途径.
研究的目的:
- 为脱开发一种高效的纳米- (Ga-Pt) 双金属催化剂.
- 在部分脱氧化和孤立位上支持的Ga-Pt催化剂的结构-活性关系的研究.
主要方法:
- 通过对含有的前体进行顺序接种,制备Ga-Pt双金属纳米粒子.
- 使用现场X射线吸收光谱对催化剂进行表征,以监测减少物种的形成 (Gaδ+Pt0/SiO2).
- 在脱过程中对催化性能进行评估.
主要成果:
- 形成一个GaxPt (0.5 < x < 0.9) 合金结构,其中有一部分是孤立的位.
- 与单个成分相比,Ga-Pt双金属催化剂的活性,选择性和稳定性显著提高.
- 增强的性能归因于分散的GaxPt合金的协同作用和支的低布伦斯特德酸度.
结论:
- 开发的Ga-Pt双金属催化剂代表了脱技术的重大进步.
- 这种独特的纳米结构和成分是实现卓越催化性能的关键.
- 这种方法为有效利用页岩气中的轻碳化合物提供了一个有前途的途径.
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