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Direct Observation of Hydrogen Spillover in Ni-Loaded Pr-Doped Ceria

Published

Author(s)

Vaneet Sharma, Peter A. Crozier, Renu Sharma, James B. Adams

Abstract

Hydrogen-spillover in Ni-loaded Pr-doped ceria (PDC) was directly observed using an environmental transmission electron microscope (ETEM). Localized reduction of ceria in a H2 atmosphere was observed and attributed to gas-Ni-ceria interactions at the three phase boundary. The spatial extent of the localized reduction zones were experimentally determined and correlated with particle size. The spillover mechanism is discussed in terms of surface diffusion properties of atomic hydrogen and oxygen species.
Citation
Catalysis Today
Volume
180
Issue
1

Keywords

In situ, Pr-doped ceria, reduction zone, hydrogen spillover, ETEM

Citation

Sharma, V. , Crozier, P. , Sharma, R. and Adams, J. (2012), Direct Observation of Hydrogen Spillover in Ni-Loaded Pr-Doped Ceria, Catalysis Today, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=908886 (Accessed December 1, 2021)
Created January 16, 2012, Updated October 12, 2021