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Activation of commercial Pt/C catalyst toward glucose electro-oxidation by irreversible Bi adsorption
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry. Aalto Univ, Dept Chem & Mat Sci, POB 16100, Aalto 00076, Finland.
Aalto Univ, Dept Chem & Mat Sci, POB 16100, Aalto 00076, Finland..ORCID iD: 0000-0001-6671-8582
2018 (English)In: Journal of Energy Challenges and Mechanics, ISSN 2095-4956, E-ISSN 2056-9386, Vol. 27, no 5, p. 1446-1452Article in journal (Refereed) Published
Abstract [en]

The effect of irreversibly adsorbed Bi on commercial Pt/C catalyst toward glucose electro-oxidation reaction (GOR) in different electrolytes (acidic, neutral, alkaline) is studied. Bi is successfully deposited on Pt/C from Bi3+ containing acidic solution from 0 to 90% coverage degree. The stability of the Bi layer in acid and alkaline corresponded to previous studies and started to dissolve at 0.7 V and 0.8 V versus reversible hydrogen electrode (RHE), respectively. However, in neutral phosphate buffer the layer showed remarkable stability to at least 1.2 V versus RHE. Bi modification at low (20%) and high (80%) coverage showed the highest increase in the activity of Pt/C toward GOR by a factor up to 7 due to the increased poisoning resistance of the modified catalyst. The effect of poisoning was especially reduced at high Bi coverage (80%), which shows that adsorbate blocked by Bi through the third-body effect is effective. Finally, with or without Bi modification GOR on Pt/C was most active in alkaline conditions.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 27, no 5, p. 1446-1452
Keywords [en]
Glucose electro-oxidation, Platinum, Bismuth, Catalyst poisoning, Renewable resources
National Category
Other Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-235112DOI: 10.1016/j.jechem.2017.09.030ISI: 000443315400020Scopus ID: 2-s2.0-85032732424OAI: oai:DiVA.org:kth-235112DiVA, id: diva2:1248772
Note

QC 20180917

Available from: 2018-09-17 Created: 2018-09-17 Last updated: 2020-03-09Bibliographically approved

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