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Synthesis and Characteristics of Nanocrystalline Ni1-xCoxO/GDC Powder as a Methane Reforming Catalyst for SOFCs

Unal, I, Meisuria, S, Choolaei, Mohammadmehdi, Ramirez Reina, Tomas and Amini Horri, Bahman (2018) Synthesis and Characteristics of Nanocrystalline Ni1-xCoxO/GDC Powder as a Methane Reforming Catalyst for SOFCs Ceramics International, 44 (6). pp. 6851-6860.

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Abstract

This paper has described the application of nickel-doped catalytic constituents based on gadolinium-doped ceria (GDC) for fabrication of the solid-oxide fuel cell (SOFC) anode layer integrated with an in-situ methane-reforming layer (MRL). Nanocrystalline powders of Ni1-xCo3xO1+3x/GDC and Ni1-xCuxO/GDC with various compositions (x = 0.3, 0.5, 0.7) were synthesised using an ultrasound-assisted method followed by a thermal treatment to be applied for fabrication of the integrated MRL and the SOFC anode layer, respectively. Thermogravimetric analysis showed that the synthesized powders should be optimally calcined at 700 °C to exhibit improved crystallinity and catalytic activity. The morphological analysis showed the formation of nanocrystalline powders with particle size ranging from 4-86 nm that was confirmed by the crystal size analysis using XRD results. The elemental analysis by EDX indicated a successful distribution of the constituent ceramic and bimetallic phases after the addition of a sonication stage. The results of FT-IR and Raman spectroscopy confirmed lack of solvents residual after calcination that was in agreement with residual moisture content values obtained from TGA data. The fabricated anode-MRL bilayers had an adequate porosity (36.7%) and shrinkage (33.5%) after adding carbon particles as a pore former (at a loading fraction of 5.9 wt.%). The catalytic performance measurements of the MRL showed a methane conversion of 13% at maximum activity with a weight hour space velocity (WHSV) of 60 L/gh that was mainly due to carbon deposition in the reaction condition.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Unal, I
Meisuria, S
Choolaei, Mohammadmehdim.choolaei@surrey.ac.uk
Ramirez Reina, Tomast.ramirezreina@surrey.ac.uk
Amini Horri, Bahmanb.aminihorri@surrey.ac.uk
Date : 19 January 2018
Identification Number : 10.1016/j.ceramint.2018.01.109
Copyright Disclaimer : © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Solid Oxide Fuel Cells; Methane Reforming Layer; Integrated Anode Layer, Internal Methane Reforming
Depositing User : Melanie Hughes
Date Deposited : 23 Jan 2018 09:42
Last Modified : 23 Mar 2018 12:42
URI: http://epubs.surrey.ac.uk/id/eprint/845663

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