Abstract
The paper is an overview of the results of the investigation on electrochemical promotion of three catalytic reactions: methane oxidation with oxygen, NO reduction with hydrogen at 135 degrees C and Fischer-Tropsch synthesis (FTS) at 170 degrees C in the [CH4/O-2(or NO/H-2 or CO/H-2)/Ar//Pt(or Pt/Ru)//PBI(H3PO4)/H-2, Ar] fuel cell. It has been shown that the partial methane oxidation to C2H2 and the C-2 selectivity were electrochemically promoted by the negative catalyst polarization. This was also the case in NO reduction with hydrogen for low NO and H-2 partial pressures. In both cases the catalytic reactions have been promoted by the electrochemically produced hydrogen. It has been found that the NO reduction with hydrogen on the Pt/PBI strongly depends on NO and hydrogen partial pressures in the working gas mixture. At higher NO and H-2 partial pressures the catalysis is promoted by the electrochemical pumping of H+ from the catalyst, i.e. at positive polarization. FTS demonstrated the highest methane production rate (11% of CO conversion) at zero fuel cell voltage.
Original language | English |
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Journal | Topics in Catalysis |
Volume | 44 |
Issue number | 3 |
Pages (from-to) | 427-434 |
ISSN | 1022-5528 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- fuel cell
- XPS
- amide
- surface
- amine oxide
- PBI
- pyridine
- NO reduction
- Fischer-Tropsch synthesis
- electrochemical promotion
- dimethylamine
- Cu(110)
- methane oxidation
- STM