银和铜双单原子通过协同催化促进甲直接氧化成甲醇
Baiyang Yu1,2, Lu Cheng3,4, Sheng Dai3
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China.
概括
这项研究引入了一种新的双单原子催化剂 (Ag-Cu/ZSM-5),用于高效的甲氧化. 催化剂表现出卓越的甲醇生产率和选择性,为先进的甲转化技术铺平了道路.
科学领域:
- 不同质的催化剂.
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 原子精确的活性站点建设对于催化是至关重要的,但仍然具有挑战性.
- 开发用于直接甲氧化 (DOM) 的高效催化剂对于利用天然气资源至关重要.
研究的目的:
- 设计和建造一个ZSM-5支持的Cu和Ag双单原子催化剂 (Ag1-Cu1/ZSM-5 hetero-SAC) 用于使用H2O2.2.进行增强的甲直接氧化 (DOM).
- 为了研究双单原子对催化性能的协同效应.
主要方法:
- 使用修改的协同吸附策略合成Ag1-Cu1/ZSM-5异质SAC.
- 催化剂结构和活性位点的表征.
- 在70°C使用H2O2对DOM的催化性能进行评估.
主要成果:
- 在30分钟内,Ag1-Cu1/ZSM-5异构SAC实现了20,115μmolgcat-1的甲醇生产率,具有81%的选择性.
- Ag和Cu之间的协同作用促进了反应性基物种的形成,增强了C-H键的激活.
- 双重单原子催化剂在活性,选择性和稳定性方面超过了大多数最先进的贵金属催化剂.
结论:
- 银和铜单个原子之间的协同相互作用是DOM增强的催化性能的关键.
- 双单原子活性站点的原子级设计为开发用于甲转换的先进催化剂提供了一个有希望的策略.
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