催化中国, 中国催化分享 http://blog.sciencenet.cn/u/catachina 化学家(www.chemj.cn)

博文

【浙师大鲁继青】磷酸根改性的Co3O4:缺陷、表面酸性提高二氯甲烷催化燃烧、抑制多氯副产物

已有 292 次阅读 2022-9-23 08:33 |个人分类:Cl-VOCs 动 态|系统分类:科研笔记


https://doi.org/10.1016/j.apsusc.2022.154924


1663892693088.png

Abstract

The catalytic oxidation of chlorinated volatile organic compounds (CVOCs) is an important topic in environmental catalysis, but the design of highly effective catalysts remains challenging. In this work, phosphate – modified Co3O4 oxides gave higher activity, better durability and much lower selectivities to Cl-containing byproducts (e.g., CH3Cl and CHCl3) compared to the pristine Co3O4 in the catalytic oxidation of dichloromethane (CH2Cl2). Such phosphate modification created more oxygen vacancies on the Co3O4 and thus enhanced reducibility. On the other hand, the presence of phosphate generated abundant surface Brønsted acid sites and suppressed surface basicity. The improved performance was related to the promoted adsorption/activation of CH2Cl2 on the surface acid sites, and synergistically facile oxidation of the reactive intermediates by the oxygen species activated on the oxygen vacancies. Moreover, on the modified catalyst, the fast oxidation of the reaction intermediate (i.e., CH3O-) inhibited the formation of CH3Cl. Meanwhile, the low surface basicity of the catalyst was probably responsible to the low selectivity to CHCl3.


有幸提前学习鲁老师的大作,看样子磷酸根在CVOCs催化燃烧中的应用已经引起了更多的研究人员的注意。我们已经证实“工业化”的应用基本没问题



https://blog.sciencenet.cn/blog-3913-1356491.html

上一篇:【中科院城环所贾宏鹏教授】Pt/CeO2穿上"钨硅杂多酸"铠甲 让氯苯催化燃烧没有多氯副产物
下一篇:[转载]详解EPR图谱的介绍和4种图谱的分析
收藏 IP: 116.236.209.*| 热度|

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2022-10-3 17:08

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部