Growth, Structure, and Catalytic Properties of ZnOx Grown on CuOx/Cu(111) Surfaces

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

doi:10.1021/acs.jpcc.8b09243

Title: Growth, Structure, and Catalytic Properties of ZnO_x Grown on CuO_x/Cu(111) Surfaces

Journal Article · Tue Oct 30 00:00:00 EDT 2018 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.8b09243· OSTI ID:1484882

^[1]; Kang, Jindong ^[2]; Ramírez, Pedro J. ^[3]; Hamlyn, Rebecca ^[2]; Rui, Ning ^[1];

^[1]; Orozco, Ivan ^[2];

^[2];

^[4]

Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Dept.
State Univ. of New York (SUNY) at Stony Brook, Stony Brook, NY (United States). Dept. of Chemistry
Univ. Central de Venezuela, Caracas (Venezuela). Facultad de Ciencias
Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Dept.; Univ. Central de Venezuela, Caracas (Venezuela). Facultad de Ciencias

A catalyst with a ZnO/Cu configuration plays an important role in the synthesis of methanol from CO2 hydrogenation. In this study, scanning tunneling microscopy and X-ray photoelectron spectroscopy (XPS) were used to investigate the growth mode of small coverages of ZnO_x, θ_oxi < 0.3 monolayer, on a Cu(111) substrate. Our results show that the modes of growth, size, and shape of the ZnO nanoparticles are strongly dependent on the Zn deposition temperature. In a set of experiments, Zn was deposited on Cu(111) or CuO_x/Cu(111) surfaces at 300 K with subsequent exposure to O₂ at higher temperatures (400–550 K), which exhibited small particles of ZnO (<20 nm in size) on the surface. The deposition of Zn onto CuO_x/Cu(111) at elevated temperatures (450–600 K) in an oxygen ambient produced large ZnO islands (300–650 nm in size), which were very rough and spread over several terraces of Cu(111). XPS/Auger spectra showed that all of the preparation conditions stated above led to the formation ZnO/CuO_x/Cu(111) surfaces where the oxidation state of zinc was uniform. In conclusion, catalytic tests showed that all these surfaces were active for the hydrogenation of CO₂ to methanol, but only the systems prepared at 600 K displayed long-term stability under reaction conditions.

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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:: 1484882

Report Number(s):: BNL-209648-2018-JAAM

Journal Information:: Journal of Physical Chemistry. C, Vol. 122, Issue 46; ISSN 1932-7447

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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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
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
Selective hydrogenation of CO ₂ over a Ce promoted Cu-based catalyst confined by SBA-15 Hu, Xiaosong; Zhao, Chaoyue; Guan, Qingxin Inorganic Chemistry Frontiers, Vol. 6, Issue 7 https://doi.org/10.1039/c9qi00397e	journal	January 2019

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Title: Growth, Structure, and Catalytic Properties of ZnO_x Grown on CuO_x/Cu(111) Surfaces