nPd0 · (H x–2n MoO3) composites as catalysts of methanol and formic acid electrooxidation
| Autor: | Vitaly V. Kuznetsov, R. S. Batalov, Boris I. Podlovchenko |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Formic acid Inorganic chemistry chemistry.chemical_element Molybdenum bronze 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Chloride 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Molybdenum medicine Methanol Composite material 0210 nano-technology medicine.drug Palladium |
| Zdroj: | Russian Journal of Electrochemistry. 52:408-419 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s1023193516050074 |
| Popis: | nPd0 · (Hx–2nMoO3)/GC electrodes (0 < n < 1) were obtained by currentless redox reaction between hydrogen-containing molybdenum bronzes and palladium(II) chloride. The composites were characterized by electrochemical methods and by SEM, TEM, XRD, XPS, and AES–ICP. The morphology, structure, and composition of the electrodes depend on the degree of reduction of the starting molybdenum bronze. The use of red molybdenum bronze HxMoO3 (x ≈ 1.55) led to the formation of a composite characterized by longer palladium/molybdenum oxide compound boundaries than in the case of green molybdenum bronze (x ≈ 1.9). On the nPd0 · (Hx–2nMoO3)red/GC electrodes, the catalytic effect with respect to methanol electrooxidation (MEO) was significant, while formic acid electrooxidation (FAEO) was accelerated insignificantly. Possible reasons for the difference in the effect of Pd modification with molybdenum bronzes on MEO and FAEO were discussed. |
| Databáze: | OpenAIRE |
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