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

博文

【华理戴启广&王幸宜】Zr均相掺杂的无定形MnOx上二氯乙烷催化燃烧

已有 651 次阅读 2021-7-2 08:02 |个人分类:Cl-VOCs 动 态|系统分类:科研笔记

Amorphous and Homogeneously Zr-doped MnOx with Enhanced Acid and Redox properties for Catalytic Oxidation of 1,2-Dichloroethane

https://www.sciencedirect.com/science/article/pii/S1385894721026498


image.png

Abstract

Series of MnOx based catalysts were prepared and investigated for 1,2-dichloroethane (1,2-DCE) oxidation. R-ZrMn prepared by a novel reflux method presented an amorphous structure and homogeneous dispersion of Zr, which prominently enhanced acid and redox properties, such as more surface oxygen species and vacancies (OAds/OLatt = 0.53), better reducibility, severer Jahn-Teller distortion, more total acid amount (396 μmol·g-1) and Brønsted acid sites. Compared with the pristine MnOx and ZrO2, R-ZrMn exhibited a better catalytic activity for 1,2-DCE oxidation (T90 = 287 °C and the reaction rate at 150 °C was 5.13 μmol min-1·g-1), less formation of chlorinated by-products, high durability and resistance-H2O. Catalytic oxidation of 1,2-DCE and the formation of chlorinated by-products on MnOx based catalysts was typically represented as a synergistic catalysis process of acid and redox sites, and a positive relationship between total acid amount or OAds/OLatt and reaction rate of 1,2-DCE oxidation was clearly observed. Meanwhile, a possible mechanism and formation pathway were proposed.

Highlights

 

1. Amorphous and homogeneous Zr-Mn binary oxide was prepared by a novel reflux method.

2. The introduction of Zr significantly promoted the redox and acidity properties of MnOx.

3. Zr-Mn binary oxide exhibited high activity, stability and H2O-tolerance for 1,2-DCE oxidation.

4. Structure distortion and balanced acid-redox determined 1,2-DCE oxidation and by-products formation.

image.png





https://wap.sciencenet.cn/blog-3913-1293713.html

上一篇:[转载]2021年环境类期刊最新影响因子(JCR2020-IF):附完整版2021年影响因子(2020JCR-IF)
下一篇:Advanced Powder Materials (APM)即将上线!

0

该博文允许注册用户评论 请点击登录 评论 (1 个评论)

数据加载中...

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

GMT+8, 2021-9-18 19:55

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部