In Situ Synthesis of Monolithic Cu2O-CuO/Cu Catalysts for Effective Ozone Decomposition

被引：27

作者：

Wang, Anqi ^{[1
,2
,3
]}

Guan, Jian ^{[1
,2
,3
]}

Zhang, Le ^{[1
,2
,3
]}

Wang, Hang ^{[1
,2
,3
]}

Ma, Guojun ^{[1
,2
,3
]}

Fan, Guijun ^{[1
,2
,3
]}

Tang, Wenxiang ^{[4
]}

Han, Ning ^{[1
,2
,3
]}

Chen, Yunfa ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China

[4] Sichuan Univ, Sch Chem Engn, Chengdu 610065, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2022年 / 126卷 / 01期

基金：

国家重点研发计划;

关键词：

MANGANESE DIOXIDES; CU2O NANOWIRES; CUO NANOWIRES; GASEOUS OZONE; REDUCTION; COPPER; FABRICATION; PRECURSORS; EVOLUTION; DIFFUSION;

D O I：

10.1021/acs.jpcc.1c10208

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nowadays, ozone (O-3) has become a worldwide pollutant, and it is challenging to prepare monolithic O-3 decomposition catalysts substituting the conventional complicated process of adhering catalyst powders onto porous substrates. Herein, monolithic Cu2O-CuO/Cu catalysts are obtained facilely by in situ thermal oxidizing- reducing copper foam. After optimization, the CuO nanowires (NWs) are first produced by annealing Cu foam in O-2 at 400 degrees C for 2 h and then the NW surface is reduced into Cu2O by annealing in Ar/H-2 at 350 degrees C for 2 h. The obtained Cu2O-CuO/Cu monolithic catalyst exhibits high catalytic activity to 20 ppm O-3, maintaining 100% at a space velocity of 11,000 11 h(-1) and even about 94% at 38,000 11 h(-1). The catalytic ability toward O3 can be attributed to the generated Cu+/Cu2+ redox couples, the donor/acceptor-type point defects, and the Cu2O-CuO p-p heterojunction. This demonstrates the successful and convenient preparation of the monolithic catalyst for rapid, controllable, and productive O-3 removal applications.

引用

页码：317 / 325

页数：9