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在CO₂中化Ni和Ru催化剂的石墨烯基材料支:排除性能和不纯度作用

Sina Ebrahim Atakoohi¹, Paola Riani^2,3, Elena Spennati^1,3

¹Department of Civil, Chemical, and Environmental Engineering, University of Genova, Via Opera Pia 15, 16145, Genova, Italy.

|July 23, 2024

概括

石墨烯纳米粒子 (Gnp) 支持显示了CO2化催化剂的前景,Ru/Gnp在逆水气转移反应中表现出高选择性. 这些Gnp支持的催化剂为二氧化碳利用提供了可行的途径.

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:

二氧化碳 (CO2) 化对于可持续的化学生产至关重要.
基于石墨烯的材料作为催化剂支提供了独特的特性.
了解催化剂失活机制对于有效利用二氧化碳至关重要.

研究的目的:

评估石墨烯纳米粒子 (Gnp) 和减少石墨烯氧化物 (rGO) 作为二氧化碳化催化剂的支.
描述支持Gnp和rGO的Ni和Ru基催化剂.
了解这些催化剂在反应条件下的行为和失活.

主要方法:

合成和表征实验室制备的Gnp,商业Gnp和rGO.
使用Raman,IR,XRD,FE-SEM-EDXS,XPS和TEM.使用这些材料支持的Ni和Ru催化剂的制备和深度表征.
对二氧化碳化的催化活性和选择性的评估.
通过排气催化剂的表征来分析催化剂失活的情况.

主要成果:

石墨烯纳米粒子支持的催化剂对CO2化是活跃的,而rGO支持的催化剂是不活跃的.
(Ru) 催化剂对逆水气转移 (rWGS) 反应具有很高的选择性,产生高产量的CO.
确定rWGS反应的明显激活能量为70-90kJ/mol.
排气催化剂显示硫中毒,形成金属硫化物和氧化物种,表明失活路径.

结论:

石墨烯纳米粒子支对二氧化碳化催化剂来说是有前途的.
Ru/Gnp催化剂对rWGS反应具有高度选择性,有助于二氧化碳利用.
了解催化剂失活,特别是硫中毒,对于开发强大的催化系统至关重要.

关键词:

二氧化碳的化基于碳的碳基不同质的催化剂.化的盐是化的盐.支持的催化剂电路电路系统 (rWGS) 是一个电路系统.

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