Performance and carbon deposition over Pd nanoparticle catalyst promoted Ni/GDC anode of SOFCs in methane, methanol and ethanol fuels
MetadataShow full item record
The electrochemical performance and carbon deposition on palladium catalyst promoted Ni/Gd0.1C0.9O1.95 (Ni/GDC) anode in methane and alcohol fuels like methanol and ethanol are investigated at open circuit potential and under dc bias using electrochemical impedance spectroscopy technique. Presence of Pd nanoparticle catalyst significantly promotes the electrocatalytic activity of Ni/GDC for the electrooxidation reaction in methane and in particularly in methanol and ethanol fuels. For instance, in the case of methanol oxidation reaction, there is clear separation of the impedance arcs at high and low frequencies and activation energy for the reaction is reduced by ~33% on a 0.15 mg cm−2 PdO impregnated or infiltrated Ni/GDC anode. The transitional impedance response study when the inlet gas is switched from hydrogen to methane or alcohol fuels indicates that the oxidation reaction in methane and alcohol fuels is most likely dominated by adsorption, dissociation and diffusion steps of the reaction. Carbon deposition is also observed on Pd-infiltrated Ni/GDC in methanol and ethanol, but different from that observed in methane, there is no filament carbon fibers formation on the Pd-impregnated Ni/GDC surface in methanol fuel.
Showing items related by title, author, creator and subject.
Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidationSankar, S.; Watanabe, N.; Anilkumar, G.; Nair, Balagopal; Sivakamiammal, S.; Tamaki, T.; Yamaguchi, T. (2019)Direct alcohol fuel cells (DAFCs) are widely regarded as one of the most promising among the futuristic and capable energy systems; direct liquid fuel cells (DLFCs). In this article, we discuss in detail the competency ...
Effects of alkali promoters on tri-metallic Co-Ni-Cu-based perovskite catalyst for higher alcohol synthesis from syngasAo, Min; Pham, Gia ; Sunarso, J.; Li, F.; Jin, Y.; Liu, Shaomin (2019)© 2019 Elsevier B.V. Direct conversion of natural gas-derived syngas into higher alcohols via the Fischer-Tropsch process offers a more sustainable pathway to address fuels and chemicals demands for various industries in ...
Lithium and lanthanum promoted Ni-Al2O3 as an active and highly coking resistant catalyst layer for solid-oxide fuel cells operating on methaneWang, W.; Ran, R.; Shao, Zongping (2011)Ni-Al2O3 catalyst is modified with Li 2O3, La2O3 and CaO promoters to improve its resistance to coking. These catalysts are used as the materials of the anode catalyst layer in solid-oxide fuel cells operating on methane. ...