The behavior of inverse oxide/metal catalysts: CO oxidation and water-gas shift reactions over ZnO/Cu(111) surfaces
- 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/CuOx/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/CuOx/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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1504405
- Alternate ID(s):
- OSTI ID: 1776227
- Report Number(s):
- BNL-211479-2019-JAAM
- Journal Information:
- Surface Science, Vol. 681; ISSN 0039-6028
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Hydroxylation of ZnO/Cu(1 1 1) inverse catalysts under ambient water vapor and the water–gas shift reaction
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journal | August 2019 |
Growth and structural studies of In/Au(111) alloys and InO x /Au(111) inverse oxide/metal model catalysts
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journal | February 2020 |
Large‐Scale Synthesis of Strain‐Tunable Semiconducting Antimonene on Copper Oxide
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journal | December 2019 |
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