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在二氧化碳₂中解锁双通道路径化为甲醇,而不是在无形上单位

Meng Yang^1,2, Jiafeng Yu¹, Anna Zimina^3,4

¹Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, 116023, Dalian, China.

Angewandte Chemie (International ed. in English)

|November 7, 2023

概括

在二氧化支上的单位基物种增强了二氧化碳 (CO2) 转化为甲醇的铜催化剂活性. 这创造了一个双通道通道,提高了甲醇生产效率.

科学领域:

催化科学催化科学
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:

大规模的二氧化碳 (CO2) 转化为甲醇对于可持续的甲醇经济至关重要.
带有基的铜基催化剂对二氧化碳吸附和激活充满希望.
进化中的Zr物种的确切作用及其对反应途径的结构影响仍然不清楚.

研究的目的:

为了研究单位Zr物种在二氧化碳转换的二氧化矩阵中的行为.
阐明单位Zr结构对甲醇合成反应通路的影响.
通过设计Zr-Si相互作用来增强基于Cu的催化剂的活性.

主要方法:

制造具有增强Zr-Si相互作用的Cu/ZrO2-SiO2催化剂,以创建单位Zr物种.
在现场X射线吸收光谱 (XAS) 用于监测Zr物种在反应条件下的协调环境.
反应途径的分析,包括形成和逆水气转移 (RWGS) +CO-水路.

主要成果:

单位Zr物种表现出对大气和反应条件敏感的协调环境.
二氧化碳吸附最好发生在Cu和单位Zr之间的接口上,而不是在ZrO2纳米粒子上.
在单位Zr上建立了一条双通道 (格式和RWGS+CO-水) 路径,显著增强Cu催化剂活性.

结论:

在上分散的单位Zr物种为甲醇合成提供了非竞争性的并行途径.
这种双通道机制补充了主导形式路径,导致Cu/SiO2催化剂活性增加了六倍.
该研究强调了原子分散氧化物的潜力,如单位Zr,在促进催化科学和二氧化碳利用方面.

关键词:

二氧化碳化成甲醇基于的催化剂在现场 XASAS.单个网站 Zrr 单原子催化剂的使用方法

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