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Title: In Situ Time-Resolved Characterization of Novel Cu-MoO2 Catalysts During the Water-Gas Shift Reaction

Abstract

A novel and active Cu-MoO{sub 2} catalyst was synthesized by partial reduction of a precursor CuMoO{sub 4} mixed-metal oxide with CO or H{sub 2} at 200-250 C. The phase transformations of Cu-MoO{sub 2} during H{sub 2} reduction and the water-gas shift reaction could be followed by In situ time resolved XRD techniques. During the reduction process the diffraction pattern of the CuMoO{sub 4} collapsed and the copper metal lines were observed on an amorphous material background that was assigned to molybdenum oxides. During the first pass of water-gas shift (WGS) reaction, diffraction lines for Cu{sub 6}Mo{sub 5}O{sub 18} and MoO{sub 2} appeared around 350 C and Cu{sub 6}Mo{sub 5}O{sub 18} was further transformed to Cu/MoO{sub 2} at higher temperature. During subsequent passes, significant WGS catalytic activity was observed with relatively stable plateaus in product formation around 350, 400 and 500 C. The interfacial interactions between Cu clusters and MoO{sub 2} increased the water-gas shift catalytic activities at 350 and 400 C.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930641
Report Number(s):
BNL-81052-2008-JA
Journal ID: ISSN 1011-372X; CALEER; TRN: US200901%%9
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Catalysis Letters; Journal Volume: 113; Journal Issue: 39449
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 01 COAL, LIGNITE, AND PEAT; CATALYSTS; COPPER; MOLYBDENUM OXIDES; PHASE TRANSFORMATIONS; SYNTHESIS; WATER GAS PROCESSES; SHIFT PROCESSES; CATALYTIC EFFECTS; MONITORING; X-RAY DIFFRACTION; national synchrotron light source

Citation Formats

Wen ,W., Liu, J., White, M., Marinkovic, N., Hanson, J., and Rodriguez, J. In Situ Time-Resolved Characterization of Novel Cu-MoO2 Catalysts During the Water-Gas Shift Reaction. United States: N. p., 2007. Web. doi:10.1007/s10562-006-9003-7.
Wen ,W., Liu, J., White, M., Marinkovic, N., Hanson, J., & Rodriguez, J. In Situ Time-Resolved Characterization of Novel Cu-MoO2 Catalysts During the Water-Gas Shift Reaction. United States. doi:10.1007/s10562-006-9003-7.
Wen ,W., Liu, J., White, M., Marinkovic, N., Hanson, J., and Rodriguez, J. Mon . "In Situ Time-Resolved Characterization of Novel Cu-MoO2 Catalysts During the Water-Gas Shift Reaction". United States. doi:10.1007/s10562-006-9003-7.
@article{osti_930641,
title = {In Situ Time-Resolved Characterization of Novel Cu-MoO2 Catalysts During the Water-Gas Shift Reaction},
author = {Wen ,W. and Liu, J. and White, M. and Marinkovic, N. and Hanson, J. and Rodriguez, J.},
abstractNote = {A novel and active Cu-MoO{sub 2} catalyst was synthesized by partial reduction of a precursor CuMoO{sub 4} mixed-metal oxide with CO or H{sub 2} at 200-250 C. The phase transformations of Cu-MoO{sub 2} during H{sub 2} reduction and the water-gas shift reaction could be followed by In situ time resolved XRD techniques. During the reduction process the diffraction pattern of the CuMoO{sub 4} collapsed and the copper metal lines were observed on an amorphous material background that was assigned to molybdenum oxides. During the first pass of water-gas shift (WGS) reaction, diffraction lines for Cu{sub 6}Mo{sub 5}O{sub 18} and MoO{sub 2} appeared around 350 C and Cu{sub 6}Mo{sub 5}O{sub 18} was further transformed to Cu/MoO{sub 2} at higher temperature. During subsequent passes, significant WGS catalytic activity was observed with relatively stable plateaus in product formation around 350, 400 and 500 C. The interfacial interactions between Cu clusters and MoO{sub 2} increased the water-gas shift catalytic activities at 350 and 400 C.},
doi = {10.1007/s10562-006-9003-7},
journal = {Catalysis Letters},
number = 39449,
volume = 113,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}