Cu supported on various oxides as a candidate catalyst for dry methane reforming in DIR-SOFCs systems

A series of Cu-support systems were tested as potential candidates for DIR-SOFC (Direct Internal Reforming SOFC) catalysts towards a dry reforming of methane (DRM). The various supports (a-Al2O3, CeO2, ZrO2, SrTiO3) with comparable specific surface area (SSA), and additionally g-Al2O3 with SSA an order of magnitude larger than that of the other supports has been applied. The obtained Cu-support systems were characterized in terms of structure (XRD, XPS), microstructure (SEM), redox properties (TPR/TPOx), and next their catalytic activity and selectivity in DRM reaction were tested. All Cu-support materials show catalytic activity in DRM reaction, but only activity of Cu-SrTiO3 is high (due to the incorporation of Cu into SrTiO3 structure). The catalytic activity of other materials depends on the copper oxidation state (Cu2} and Cu}). The highest catalytic activity in DRM process was obtained for Cu-AlO(OH) catalyst thanks to an order of greater SSA than in the case of other systems.(c) 2022 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

A series of Cu-support systems were tested as potential candidates for DIR-SOFC catalysts in the dry reforming of methane (DRM). The catalytic activity of Cu-support materials in DRM reaction depends on the copper oxidation state and specific surface area. Cu-SrTiO3 exhibited the highest catalytic activity among all the materials tested.