协调接口和促进剂的协同效应,以增强Ru@N-C催化剂的氨合成活性
Dongwei Wang1,2, Zhanwei Ma1, Farong Gou1
1State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China zhanweima@licp.cas.cn hcom@licp.cas.cn.
二甲 (Ru3(CO) 12) 衍生的Ru@N-C催化剂显示出增强的氨合成活性. 的提升显著提高了催化性能,促进了N2激活和NH3溶解,从而有效地产生氨.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 氨合成对全球农业和工业至关重要.
- 开发高活性和稳定的基催化剂是一个持续的研究重点.
- 三二甲 (Ru3(CO) 12) 为催化剂前体应用提供了独特的特性.
研究的目的:
- 用Ru3(CO) 12作为前体合成新的Ru@N-C催化剂.
- 研究促进剂对氨基合成催化活性的影响.
- 了解开发的催化剂的结构-活性关系.
主要方法:
- 通过将Ru3(CO) 12纳入ZIF-8.8中来合成Ru@N-C催化剂.
- 促进催化剂的制备 (例如,2Ba-Ru@N-C(450)).
- 在特定的温度和压力条件下对氨合成活性进行测试.
- 使用像H2-TPR,XPS和NH3-TPD这样的技术进行表征.
主要成果:
- Ru@N-C催化剂的活性高于传统的Ru/AC催化剂.
- 2Ba-Ru@N-C(450) 催化剂表现出最高的氨合成活性.
- Ba促进剂增强了Ru纳米粒子的电子密度,促进了N2裂变,并促进了NH3脱离.
- 优化的催化剂在360°C和1MPa时实现了16817.3μmolh-1gRu-1活动.
结论:
- (Ru3) CO) 12是高活性 (Ru@N-C) 氨合成催化剂的有效前体.
- 作为电子和结构促进剂,显著提高了催化性能.
- 封闭的N-协调环境和促进剂效应是增强N2激活和氨合成的关键.
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