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有机磷(酸根)改性的氧化铈纳米片CVOCs催化燃烧首发ES&T

已有 252 次阅读 2018-10-30 08:35 |个人分类:科研点滴启发|系统分类:科研笔记

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第一次尝试EST,博费一番周折,终于发表,感谢合作者的支持!!


平时习惯于发ACB,对于EST的"套路"不是太感冒,但形势所逼,还是争取多发EST.

个人对这篇文章不是太满意,我想表达的很多内容无法表达出来

接下来可能有2-3篇的系列文章对EST这篇进行补充,一篇已经完成初稿,一篇已经完成数据,另外一篇刚开始实验

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Phosphate-Functionalized CeO2 Nanosheets for Efficient Catalytic Oxidation of Dichloromethane

Qiguang Dai,†, # Zhiyong Zhang, ‡, # Jiaorong Yan, Jinyan Wu, Grayson Johnson, Wei Sun, Xingyi Wang, Sen Zhang,*,  and Wangcheng Zhan*,


ABSTRACT 

    Tuning acid and basic sites nature and profile in the surface of redox-active metal oxide nanostructures is a promising approach to constructing efficient catalyst for the oxidative removal of chlorinated volatile organic compounds (CVOCs). Herein, using the dichloromethane (DCM) oxidation as a model reaction, we report that phosphate (POx) Brønsted acid sites can be incorporated onto CeO2 nanosheets (NSs) surface via an organophosphate-mediated route, which can effectively enhance the CeO2’s catalytic performance by promoting the removal of chlorine poisoning species. Based on the systematic study of the correlation between POx composition, surface structure (acid and basic sites) and catalytic properties, we find that the incorporated Brønsted acid sites can also function to decrease the amount of medium-strong basic sites (O2-), reducing the formation of chlorinated organic by-product monochloromethane (MCM) and leading to the desirable product HCl. At the optimized P/Ce ratio condition (0.2), the POx-CeO2 NSs can perform a stable DCM conversion of 65-70% for over 10 hours at 250°C, and over 95% conversion at 300°C, superior to both pristine and other phosphate-modified CeO2 NSs. Our work clearly identifies the critical role of acid and basic sites over functionalized CeO2 for efficient catalytic CVOCs oxidation, guiding the future advanced catalyst design for environmental remediation.


已经online,速度真快

https://pubs.acs.org/doi/10.1021/acs.est.8b05002


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