TPR–TPD–TPO studies on CGO/NiO and CGO/CuO ceramics obtained from freeze-dried precursors

Abstract

Version of article: Accepted This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License ePrints-Newcastle University ePrints http://eprint.ncl.ac.uk

CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR

“…ascribed to the reduction of the CGO support [21][22][23][24]. As expected, H 2 consumption is proportional to the Cu loading due to the presence of more reducible species.…”

CeO2Co3O4CuO anode for direct utilisation of methane or ethanol in solid oxide fuel cells

“…Firstly, the surface-capping oxygen anions attached to the Ce 4+ surface with an octahedral coordination will react with hydrogen at temperatures such as 500 to 650˚C, depending on the particle size distribution. Then finally oxygen from ceria's bulk structure will be released at temperatures above 750˚C [19,20,24]. Analysing the reduction profile of the oxide powders it is reasonable to conclude that the anode material can be properly activated at temperatures such as 700-750˚C under hydrogen atmosphere.…”

“…Since each powder is composed of a mixture of oxides, the peaks of hydrogen consumption overlap and were, thereby, deconvoluted. The reduction of copper oxide as isolated phase usually takes place between 150 and 500˚C according to Equations 12 and 13[19][20][21].…”

Ceria-Co-Cu-based SOFC anode for direct utilisation of methane or ethanol as fuels

“…Firstly, the surface capping oxygen anions attached to the Ce 4+ surface with an octahedral coordination will react with hydrogen at temperatures between 500 and 650˚C. Then, finally, oxygen from the ceria bulk structure will be released at temperatures above 750˚C [30,31]. After the analysis of the raw powder, the catalyst was treated in methane and the results of hydrocarbon decomposition are shown in the Raman spectrum of Figure 5.…”