The behavior of inverse oxide/metal catalysts: CO oxidation and water-gas shift reactions over ZnO/Cu(111) surfaces

Mahapatra, Mausumi; Gutiérrez, Ramón A.; Kang, Jindong; Rui, Ning; Hamlyn, Rebecca; Liu, Zongyuan; Orozco, Ivan; Ramírez, Pedro J.; Senanayake, Sanjaya D.; Rodriguez, José A.

doi:10.1016/j.susc.2018.09.008

The behavior of inverse oxide/metal catalysts: CO oxidation and water-gas shift reactions over ZnO/Cu(111) surfaces

Journal Article · Sat Sep 15 00:00:00 EDT 2018 · Surface Science

DOI:https://doi.org/10.1016/j.susc.2018.09.008· OSTI ID:1504405

^[1]; Gutiérrez, Ramón A. ^[2]; Kang, Jindong ^[3]; Rui, Ning ^[4]; ^[3]; ^[1]; Orozco, Ivan ^[3]; Ramírez, Pedro J. ^[2]; ^[1]; Rodriguez, José A. ^[5]

Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry
Central Univ. of Venezuela, Caracas (Venezuela)
Stony Brook Univ., NY (United States). Dept. of Chemistry
Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry; Tianjin Univ. (China). Tianjin Collaborative Innovation Center of Chemical Science and Engineering. School of Chemical Engineering and Technology
Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry; Stony Brook Univ., NY (United States). Dept. of Chemistry

There is a general desire to improve the configuration of industrial catalysts by taking advantage of the intrinsic properties of metal oxides. On an inverse oxide/metal catalyst, the reactants can interact with defect sites of the oxide nanoparticles, metal sites, and the metal-oxide interface. We have investigated the oxidation of carbon monoxide (CO + 0.5O₂ → CO₂) and the water-gas shift (WGS, CO + H₂O → H₂ + CO₂) reaction on a series of ZnO/Cu(111) surfaces prepared in different ways. Oxidation of a Zn-Cu(111) alloys with O₂ at 460 K produces ZnO/CuO_x/Cu(111) systems where the size of the ZnO islands is in the range of 5–20 nm. These systems are highly active for the oxidation of CO at moderate temperatures (400–500 K) but have problems of stability when performing the water-gas shift at temperatures above 550 K. ZnO/CuO_x/Cu(111) surfaces prepared by vapor deposition of Zn at 600 K in O₂ exhibit islands of ZnO which are extremely large (400–500 nm) and contain a minimum of 3–4 layers of the oxide. These large islands of ZnO are not as chemically active as the small ZnO clusters yet they have high stability and produce ZnO-Cu interfaces which are efficient as catalysts for the water-gas shift reaction at 550–625 K.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1504405

Alternate ID(s):: OSTI ID: 1776227

Report Number(s):: BNL--211479-2019-JAAM

Journal Information:: Surface Science, Journal Name: Surface Science Vol. 681; ISSN 0039-6028

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Growth and structural studies of In/Au(111) alloys and InO _x /Au(111) inverse oxide/metal model catalysts Kang, Jindong; Mahapatra, Mausumi; Rui, Ning The Journal of Chemical Physics, Vol. 152, Issue 5 https://doi.org/10.1063/1.5139237	journal	February 2020
Hydroxylation of ZnO/Cu(1 1 1) inverse catalysts under ambient water vapor and the water–gas shift reaction Orozco, Ivan; Huang, Erwei; Gutiérrez, Ramón A. Journal of Physics D: Applied Physics, Vol. 52, Issue 45 https://doi.org/10.1088/1361-6463/ab37da	journal	August 2019

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36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CO oxidation
copper
inverse oxide/metal catalysts
surface reactions
water-gas shift reaction
zinc oxide

The behavior of inverse oxide/metal catalysts: CO oxidation and water-gas shift reactions over ZnO/Cu(111) surfaces

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