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Title Electrochemical natural gas conversion to more valuable species
Creator/Author Kuchynka, D.J. ; Cook, R.L. ; Fammells, A.F. (Eltron Research, Inc., Aurora, IL (US))
Publication Date1991 May 01
OSTI IdentifierOSTI ID: 5556367
Other Number(s)ISSN0013-4651; CODEN: JESOA
Resource TypeJournal Article
Resource RelationJournal of the Electrochemical Society ; Vol/Issue: 138:5
Subject300504 -- Fuel Cells-- Applications ;100200 -- Synthetic Fuels-- Production-- (1990-) ;090900 -- Biomass Fuels-- Processing-- (1990-) ;400400 -- Electrochemistry; METHANE-- ENERGY CONVERSION;SOLID ELECTROLYTE FUEL CELLS-- ELECTROCATALYSTS; ELECTROCHEMISTRY;PARTIAL OXIDATION PROCESSES;PEROVSKITE;SYNTHETIC FUELS
Related SubjectALKANES;CATALYSTS;CHEMICAL REACTIONS;CHEMISTRY;CONVERSION;DIRECT ENERGY CONVERTERS;ELECTROCHEMICAL CELLS;FUEL CELLS;FUELS;HYDROCARBONS;MINERALS;ORGANIC COMPOUNDS;OXIDE MINERALS;PEROVSKITES;THERMOCHEMICAL PROCESSES
Description/Abstract This paper reports on the electrochemical oxidative dimerization of methane to give C{sub 2} hydrocarbon species investigated in solid oxide fuel cells possessing the general configuration: CH{sub 4}, anode electrocatalyst/ZrO{sub 2}(8 m/o Y{sub 2}O{sub 3})/La{sub 0.9}Sr{sub 0.1}MnO{sub 3}O{sub 2}(air).^Perovskite anode electrocatalysts shown to possess activity toward promoting the subject reaction include Sm{sub 0.5}Ce{sub 0.5}CuO{sub 3}, Tb{sub 0.8}Sm{sub 0.2}CuO{sub 3}, Gd{sub 0.9}Th{sub 0.1}CuO{sub 3}, Gd{sub 0.9}Na{sub 0.1}MnO{sub 3}, and Th{sub 0.8}Yb{sub 0.2}NiO{sub 3}.^Maximum partial faradaic current densities at active perovskite anode electrocatalysts for promoting the subject reaction were found to be directly correlatable to their calculated oxygen binding energies on the perovskite surface, where increasing binding energies were found to favor higher rates for electrochemical partial methane oxidation.^Increasing surface oxygen binding energies at perovskite anode electrocatalysts were found to correlate with increasing perovskite lattice-free volumes with electrochemical measurements, supporting increasing surface oxygen binding energies and perovskite lattice-free volumes as leading to enhanced rates for the subject reaction.^As a consequence, synergism was found between experimentally determined perovskite anode electrocatalyst activities, their calculated surface oxygen binding energies, and lattice ionic-free volumes.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 1284-1298
System Entry Date2001 May 13

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