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Effect of the preparation method on the performance of CuO–MnO x –CeO 2 catalysts for selective oxidation of CO in H 2-rich streams

Graphical abstract Highlights ► CuMC-HY exhibits the best catalytic activity for CO PROX in H 2-rich streams. ► The temperature range of CuMC-HY for CO complete conversion is from 110 to 140 °C. ► CuMC-HY maintains superior catalytic performance facing 15% CO 2 and 7.5% H 2O. ► The solid solution of... Full description

Journal Title: Journal of Power Sources 2011, Vol.196(22), pp.9590-9598
Main Author: Li, Jing
Other Authors: Zhu, Pengfei , Zhou, Renxian
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0378-7753 ; DOI: 10.1016/j.jpowsour.2011.07.052
Link: http://dx.doi.org/10.1016/j.jpowsour.2011.07.052
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recordid: sciversesciencedirect_elsevierS0378-7753(11)01390-5
title: Effect of the preparation method on the performance of CuO–MnO x –CeO 2 catalysts for selective oxidation of CO in H 2-rich streams
format: Article
creator:
  • Li, Jing
  • Zhu, Pengfei
  • Zhou, Renxian
subjects:
  • Hydrogen Purification
  • CO Selective Oxidation
  • Copper
  • Manganese
  • Ceria Support
ispartof: Journal of Power Sources, 2011, Vol.196(22), pp.9590-9598
description: Graphical abstract Highlights ► CuMC-HY exhibits the best catalytic activity for CO PROX in H 2-rich streams. ► The temperature range of CuMC-HY for CO complete conversion is from 110 to 140 °C. ► CuMC-HY maintains superior catalytic performance facing 15% CO 2 and 7.5% H 2O. ► The solid solution of Mn–Cu–Ce–O is formed over the CuMC-HY catalyst. ► A large number of Cu + and Mn 4+ species exist in CuMC-HY. Selective oxidation of CO in H 2-rich streams is performed over a series of CuO–MnO x –CeO 2 catalysts prepared by hydrothermal (CuMC-HY), co-precipitation (CuMC-CP), impregnation (CuMC-IM) and citrate sol–gel (CuMC-SG) methods. The catalysts are characterized by N 2 adsorption/desorption, XRD, SEM, HR-TEM, TPR and XPS techniques. The results show that the catalyst prepared by a hydrothermal method exhibits the best catalytic activity, especially at low temperatures. The temperature of 50% CO conversion ( T 50) is only 74 °C and the temperature window of CO conversions up to 99.0% is about 40 °C wide, from 110 to 140 °C. Moreover, the temperature window is still maintained 20 °C wide even at lower temperatures when there are 15% CO 2 and 7.5% H 2O in the reaction gas. The superior catalytic performance of CuMC-HY is attributed to the formation of Mn–Cu–Ce–O solid solution, the unique pore structure and the existence of more Cu + and Mn 4+ species as well as oxygen vacancies. The sequence of catalytic activity is as follows: CuMC-HY > CuMC-SG > CuMC-IM > CuMC-CP. The worst catalytic activity, obtained from the catalyst prepared by the co-precipitation method, is possibly related to the existence of independent CuO x and MnO x oxides, which weakly interact with ceria in the catalyst.
language: eng
source:
identifier: ISSN: 0378-7753 ; DOI: 10.1016/j.jpowsour.2011.07.052
fulltext: no_fulltext
issn:
  • 03787753
  • 0378-7753
url: Link


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titleEffect of the preparation method on the performance of CuO–MnO x –CeO 2 catalysts for selective oxidation of CO in H 2-rich streams
creatorLi, Jing ; Zhu, Pengfei ; Zhou, Renxian
ispartofJournal of Power Sources, 2011, Vol.196(22), pp.9590-9598
identifierISSN: 0378-7753 ; DOI: 10.1016/j.jpowsour.2011.07.052
subjectHydrogen Purification ; CO Selective Oxidation ; Copper ; Manganese ; Ceria Support
descriptionGraphical abstract Highlights ► CuMC-HY exhibits the best catalytic activity for CO PROX in H 2-rich streams. ► The temperature range of CuMC-HY for CO complete conversion is from 110 to 140 °C. ► CuMC-HY maintains superior catalytic performance facing 15% CO 2 and 7.5% H 2O. ► The solid solution of Mn–Cu–Ce–O is formed over the CuMC-HY catalyst. ► A large number of Cu + and Mn 4+ species exist in CuMC-HY. Selective oxidation of CO in H 2-rich streams is performed over a series of CuO–MnO x –CeO 2 catalysts prepared by hydrothermal (CuMC-HY), co-precipitation (CuMC-CP), impregnation (CuMC-IM) and citrate sol–gel (CuMC-SG) methods. The catalysts are characterized by N 2 adsorption/desorption, XRD, SEM, HR-TEM, TPR and XPS techniques. The results show that the catalyst prepared by a hydrothermal method exhibits the best catalytic activity, especially at low temperatures. The temperature of 50% CO conversion ( T 50) is only 74 °C and the temperature window of CO conversions up to 99.0% is about 40 °C wide, from 110 to 140 °C. Moreover, the temperature window is still maintained 20 °C wide even at lower temperatures when there are 15% CO 2 and 7.5% H 2O in the reaction gas. The superior catalytic performance of CuMC-HY is attributed to the formation of Mn–Cu–Ce–O solid solution, the unique pore structure and the existence of more Cu + and Mn 4+ species as well as oxygen vacancies. The sequence of catalytic activity is as follows: CuMC-HY > CuMC-SG > CuMC-IM > CuMC-CP. The worst catalytic activity, obtained from the catalyst prepared by the co-precipitation method, is possibly related to the existence of independent CuO x and MnO x oxides, which weakly interact with ceria in the catalyst.
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descriptionGraphical abstract Highlights ► CuMC-HY exhibits the best catalytic activity for CO PROX in H 2-rich streams. ► The temperature range of CuMC-HY for CO complete conversion is from 110 to 140 °C. ► CuMC-HY maintains superior catalytic performance facing 15% CO 2 and 7.5% H 2O. ► The solid solution of Mn–Cu–Ce–O is formed over the CuMC-HY catalyst. ► A large number of Cu + and Mn 4+ species exist in CuMC-HY. Selective oxidation of CO in H 2-rich streams is performed over a series of CuO–MnO x –CeO 2 catalysts prepared by hydrothermal (CuMC-HY), co-precipitation (CuMC-CP), impregnation (CuMC-IM) and citrate sol–gel (CuMC-SG) methods. The catalysts are characterized by N 2 adsorption/desorption, XRD, SEM, HR-TEM, TPR and XPS techniques. The results show that the catalyst prepared by a hydrothermal method exhibits the best catalytic activity, especially at low temperatures. The temperature of 50% CO conversion ( T 50) is only 74 °C and the temperature window of CO conversions up to 99.0% is about 40 °C wide, from 110 to 140 °C. Moreover, the temperature window is still maintained 20 °C wide even at lower temperatures when there are 15% CO 2 and 7.5% H 2O in the reaction gas. The superior catalytic performance of CuMC-HY is attributed to the formation of Mn–Cu–Ce–O solid solution, the unique pore structure and the existence of more Cu + and Mn 4+ species as well as oxygen vacancies. The sequence of catalytic activity is as follows: CuMC-HY > CuMC-SG > CuMC-IM > CuMC-CP. The worst catalytic activity, obtained from the catalyst prepared by the co-precipitation method, is possibly related to the existence of independent CuO x and MnO x oxides, which weakly interact with ceria in the catalyst.
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abstractGraphical abstract Highlights ► CuMC-HY exhibits the best catalytic activity for CO PROX in H 2-rich streams. ► The temperature range of CuMC-HY for CO complete conversion is from 110 to 140 °C. ► CuMC-HY maintains superior catalytic performance facing 15% CO 2 and 7.5% H 2O. ► The solid solution of Mn–Cu–Ce–O is formed over the CuMC-HY catalyst. ► A large number of Cu + and Mn 4+ species exist in CuMC-HY. Selective oxidation of CO in H 2-rich streams is performed over a series of CuO–MnO x –CeO 2 catalysts prepared by hydrothermal (CuMC-HY), co-precipitation (CuMC-CP), impregnation (CuMC-IM) and citrate sol–gel (CuMC-SG) methods. The catalysts are characterized by N 2 adsorption/desorption, XRD, SEM, HR-TEM, TPR and XPS techniques. The results show that the catalyst prepared by a hydrothermal method exhibits the best catalytic activity, especially at low temperatures. The temperature of 50% CO conversion ( T 50) is only 74 °C and the temperature window of CO conversions up to 99.0% is about 40 °C wide, from 110 to 140 °C. Moreover, the temperature window is still maintained 20 °C wide even at lower temperatures when there are 15% CO 2 and 7.5% H 2O in the reaction gas. The superior catalytic performance of CuMC-HY is attributed to the formation of Mn–Cu–Ce–O solid solution, the unique pore structure and the existence of more Cu + and Mn 4+ species as well as oxygen vacancies. The sequence of catalytic activity is as follows: CuMC-HY > CuMC-SG > CuMC-IM > CuMC-CP. The worst catalytic activity, obtained from the catalyst prepared by the co-precipitation method, is possibly related to the existence of independent CuO x and MnO x oxides, which weakly interact with ceria in the catalyst.
pubElsevier B.V.
doi10.1016/j.jpowsour.2011.07.052
eissn18732755
date2011-11-15