Synthesis of efficient CuO-CeO2 catalysts in limited nanospace for HCl oxidation

Chong Zou; Yong Dai; Zhao Yang Fei; Xian Chen; Ji Hai Tang; Mi Fen Cui; Xu Qiao

Synthesis of efficient CuO-CeO₂ catalysts in limited nanospace for HCl oxidation

Chong Zou, Yong Dai, Zhao Yang Fei, Xian Chen, Ji Hai Tang, Mi Fen Cui, Xu Qiao

College of Chemical Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A series of meosoporous CuO-CeO₂ composite catalysts were prepared using the ordered pores of hard template KIT-6 as a limited nanospace. The prepared catalysts were characterized by XRD, BET, Raman, ESEM, TEM and H₂-TPR.The performance of catalysts for gas-phase HCl catalytic oxidation to Cl₂ were also investigated. The results showed that CuO species could highly disperse on the surface of CuO-CeO₂ catalysts with Cu loading below 35%, as well as some Cu²⁺ dissolved into the CeO₂ lattice. In addition, the catalysts gained good surface area (>140 m²·g^-1) and small grain size. Among all catalysts, 25CuO-CeO₂ obtained the highest surface oxygen vacancies concentrations, suitable CuO dispersion and best reducibility at low temperature, leading to a 90% conversion of HCl at 370℃ (O₂/HCl=6). Kinetic studies showed that the more highly dispersed CuO provided more active sites for HCl adsorption and activation, while the oxgen vacancies could obviously enhanced the adsorption and activation of gas-phase oxygen.

Original language	English
Pages (from-to)	238-245
Number of pages	8
Journal	Journal of Molecular Catalysis
Volume	29
Issue number	3
State	Published - 1 Jun 2015

Keywords

Chloride
CuO-CeO
HCl
Hard template
Oxygen vacancies

Cite this

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title = "Synthesis of efficient CuO-CeO2 catalysts in limited nanospace for HCl oxidation",

abstract = "A series of meosoporous CuO-CeO2 composite catalysts were prepared using the ordered pores of hard template KIT-6 as a limited nanospace. The prepared catalysts were characterized by XRD, BET, Raman, ESEM, TEM and H2-TPR.The performance of catalysts for gas-phase HCl catalytic oxidation to Cl2 were also investigated. The results showed that CuO species could highly disperse on the surface of CuO-CeO2 catalysts with Cu loading below 35%, as well as some Cu2+ dissolved into the CeO2 lattice. In addition, the catalysts gained good surface area (>140 m2·g-1) and small grain size. Among all catalysts, 25CuO-CeO2 obtained the highest surface oxygen vacancies concentrations, suitable CuO dispersion and best reducibility at low temperature, leading to a 90% conversion of HCl at 370℃ (O2/HCl=6). Kinetic studies showed that the more highly dispersed CuO provided more active sites for HCl adsorption and activation, while the oxgen vacancies could obviously enhanced the adsorption and activation of gas-phase oxygen.",

keywords = "Chloride, CuO-CeO, HCl, Hard template, Oxygen vacancies",

author = "Chong Zou and Yong Dai and Fei, {Zhao Yang} and Xian Chen and Tang, {Ji Hai} and Cui, {Mi Fen} and Xu Qiao",

year = "2015",

month = jun,

day = "1",

language = "英语",

volume = "29",

pages = "238--245",

journal = "Journal of Molecular Catalysis",

issn = "1001-3555",

publisher = "Science China Press",

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TY - JOUR

T1 - Synthesis of efficient CuO-CeO2 catalysts in limited nanospace for HCl oxidation

AU - Zou, Chong

AU - Dai, Yong

AU - Fei, Zhao Yang

AU - Chen, Xian

AU - Tang, Ji Hai

AU - Cui, Mi Fen

AU - Qiao, Xu

PY - 2015/6/1

Y1 - 2015/6/1

N2 - A series of meosoporous CuO-CeO2 composite catalysts were prepared using the ordered pores of hard template KIT-6 as a limited nanospace. The prepared catalysts were characterized by XRD, BET, Raman, ESEM, TEM and H2-TPR.The performance of catalysts for gas-phase HCl catalytic oxidation to Cl2 were also investigated. The results showed that CuO species could highly disperse on the surface of CuO-CeO2 catalysts with Cu loading below 35%, as well as some Cu2+ dissolved into the CeO2 lattice. In addition, the catalysts gained good surface area (>140 m2·g-1) and small grain size. Among all catalysts, 25CuO-CeO2 obtained the highest surface oxygen vacancies concentrations, suitable CuO dispersion and best reducibility at low temperature, leading to a 90% conversion of HCl at 370℃ (O2/HCl=6). Kinetic studies showed that the more highly dispersed CuO provided more active sites for HCl adsorption and activation, while the oxgen vacancies could obviously enhanced the adsorption and activation of gas-phase oxygen.

AB - A series of meosoporous CuO-CeO2 composite catalysts were prepared using the ordered pores of hard template KIT-6 as a limited nanospace. The prepared catalysts were characterized by XRD, BET, Raman, ESEM, TEM and H2-TPR.The performance of catalysts for gas-phase HCl catalytic oxidation to Cl2 were also investigated. The results showed that CuO species could highly disperse on the surface of CuO-CeO2 catalysts with Cu loading below 35%, as well as some Cu2+ dissolved into the CeO2 lattice. In addition, the catalysts gained good surface area (>140 m2·g-1) and small grain size. Among all catalysts, 25CuO-CeO2 obtained the highest surface oxygen vacancies concentrations, suitable CuO dispersion and best reducibility at low temperature, leading to a 90% conversion of HCl at 370℃ (O2/HCl=6). Kinetic studies showed that the more highly dispersed CuO provided more active sites for HCl adsorption and activation, while the oxgen vacancies could obviously enhanced the adsorption and activation of gas-phase oxygen.

KW - Chloride

KW - CuO-CeO

KW - HCl

KW - Hard template

KW - Oxygen vacancies

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M3 - 文章

AN - SCOPUS:84938065431

SN - 1001-3555

VL - 29

SP - 238

EP - 245

JO - Journal of Molecular Catalysis

JF - Journal of Molecular Catalysis

IS - 3

ER -

Synthesis of efficient CuO-CeO₂ catalysts in limited nanospace for HCl oxidation

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Keywords

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