Ni–Cu/Ce0.9Zr0.1O2 bimetallic cermets for electrochemical and catalytic applications

Toward highly efficient in situ dry reforming of H2S contaminated methane in solid oxide fuel cells via incorporating a coke/sulfur resistant bimetallic catalyst layer

“…In fact, copper is commonly documented as an excellent "coke-suppressing" alloying element, as it dilutes the active site on the surface of nickel, restraining carbon-carbon bond formation. 12,23,24 Aer screening a series of DRM catalysts, we concluded that the conventional Ni-YSZ electro-catalyst was not appropriate for in situ dry reforming of methane, particularly due to its low activity and poor sulfur resistance. Alternatively, NiM-ZDC bimetallics exhibited a greatly improved catalytic performance, among which NiCu behaved complementarily in reference to its activity and coke/sulfur resistance.…”

“…[13][14][15][16][17] DRM is thermodynamically more prone to coking than other reforming reactions, albeit abundant achievements have been made regarding the development of coke-resistant catalysts, e.g., Ni and its alloys, during the past decades. [14][15][16][17]23,24 This is logical since if excess CO 2 is introduced to alleviate carbon deposition, it will remain as the main impurity in the effluent (excess H 2 O in SRM can be removed easily), decreasing the efficiency of the entire process. Secondly, the DRM reaction is extremely endothermic, requiring high temperatures to attain a reasonable yield of syngas.…”

Ce0.9Zr0.1O2Mixed Oxide Prepared by the Citrate Route: Impact of Synthesis Conditions on Physicochemical and Redox Properties

“…Previous studies in our research group indicated that the mixed oxide with nominal composition Ce 0.9 Zr 0.1 O 2 is a great catalyst for total oxidation of methane, and excellent support of nickel metallic phase to catalyse partial oxidation of methane , . Moreover, when impregnated with Ni or Ni/Cu, this oxide resulted a great anode material for Intermediate Temperature Solid Oxide Fuel Cells (IT‐SOFCs) , …”

“…CeO 2 ‐ZrO 2 (ZDC) mixed oxides have a broad range of applications in catalysis and fuel cells. There are many reports about their use as catalysts to control the emissions from mobile sources, as support in Ni‐ZDC catalysts to produce syngas from fossil or renewable sources,, in Cu‐ZDC catalyst to COPROX reaction and as electrode materials for solid oxide fuel cells , , …”

In situ X-ray absorption spectroscopy study of CuO–NiO/CeO2–ZrO2 oxides: redox characterization and its effect in catalytic performance for partial oxidation of methane

“…1,12 In particular, Cu-Ni catalysts stand as a promising alternative as they have shown enhanced reducibility and increased coke resistance due to the addition of Cu which is not active for CH 4 decomposition. [13][14][15] Cu active phase has been deposited over the traditional Ni/ yttria-stabilized zirconia (YSZ) anodes suitable for hightemperature SOFC operation, and carbon formation during direct hydrocarbon utilization was considerably suppressed in Cu-containing materials. 13 Aerward, in light of lowering anode operating temperature, CeO 2 -based supports have been tested in intermediate temperature SOFC conditions altogether with different ratios of Cu : Ni in the active phase.…”