Methanol oxidation at platinized copper particles prepared by galvanic replacement

Journal of Electrochemical Science and Engineering

卷:6

Stella Balomenou¹  Dimitrios Tsiplakides²  Athanasios Papaderakis³  Sotiris Sotiropoulos³  Ioanna Mintsouli³  Volodymyr Khomenko⁴  Jenia Georgieva⁵  Eugenia Valova⁵  Stephan Armyanov⁵ 

[1] Chemical Process & Energy Resources Institute, Centre for Research and Technology Hellas, 570 01, Thermi, Thessaloniki;

[2] Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124 and Chemical Process & Energy Resources Institute, Centre for Research and Technology Hellas, 570 01, Thermi, Thessaloniki;

[3] Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124;

[4] Kiev National University of Technologies and Design, Department for Electrochemical Power Engineering & Chemistry, Kiev 01011;

[5] Rostislaw Kaischew Institute of PhysicalChemistry, Bulgarian Academy of Sciences, Sofia 1113;

关键词: ransmetalation;    Electrocatalysts;    Platinum;   

DOI  :  10.5599/jese.239

来源: DOAJ

【 摘 要 】

Bimetallic Pt-Cu particles have been prepared by galvanic replacement of Cu precursor nanoparticles, upon the treatment of the latter with a chloro-platinate acidic solution. The resulting particles, typically a few tens of nm large, were supported on high surface area carbon (Vulcan® XC–72R, Cabot) and tested as electrodes. Surface electrochemistry in deaerated acid solutions was similar to that of pure Pt, indicating the existence of a Pt shell (hence the particles are denoted as Pt(Cu)). Pt(Cu)/C supported catalysts exhibit superior carbon monoxide and methanol oxidation activity with respect to their Pt/C analogues when compared on a per electroactive surface area basis, due to the modification of Pt activity by Cu residing in the particle core. However, as a result of large particle size and agglomeration phenomena, Pt(Cu)/C are still inferior to Pt/C when compared on a mass specific activity basis.

【 授权许可】

Unknown