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Activation of comme...
Activation of commercial Pt/C catalyst toward glucose electro-oxidation by irreversible Bi adsorption
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- Kanninen, Petri (författare)
- KTH,Tillämpad elektrokemi,Aalto Univ, Dept Chem & Mat Sci, POB 16100, Aalto 00076, Finland
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- Kallio, Tanja (författare)
- Aalto Univ, Dept Chem & Mat Sci, POB 16100, Aalto 00076, Finland.
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(creator_code:org_t)
- Elsevier, 2018
- 2018
- Engelska.
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Ingår i: Journal of Energy Challenges and Mechanics. - : Elsevier. - 2056-9386. ; 27:5, s. 1446-1452
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
Nyckelord
- Glucose electro-oxidation
- Platinum
- Bismuth
- Catalyst poisoning
- Renewable resources
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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