Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation
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2015
Authors
Lović, Jelena
Stevanović, Sanja

Tripković, Dušan

Tripković, Amalija
Stevanović, Rade M.
Jovanović, Vladislava M.

Popović, Ksenija

Article (Published version)

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Formic acid oxidation was examined on platinum-bismuth deposits on glassy carbon substrate prepared by two-step process, i.e., electrochemical deposition of Bi followed by electrochemical deposition of Pt as described in our previous article (J Electrochem Soc 161:H547-H554, 2014). Upon treatment of as-prepared clusters by slow anodic sweep, bimetallic structure consisting of Bi core occluded by Pt and Bi-oxide was obtained and exhibited significant activity and exceptional stability in HCOOH oxidation. In order to explain such electrocatalytic stability, in this work, the electrochemical properties of Pt"Bi/GC catalyst were investigated applying same protocols in supporting electrolyte with or without HCOOH and compared with Pt/GC. The protocols comprised potentiodynamic, quasi-steady-state, and chronoamperometric measurements combined with the surface characterization by COads stripping voltammetry. Application of potential cycling at Pt"Bi/GC electrode in supporting electrolyte cont...aining HCOOH leads to minor change in surface morphology, mildly leaching of Bi from the electrode surface, and negligible decrease in activity. On the other hand, significant Bi dissolution and considerable decrease in activity are the effects of the same treatment without HCOOH. Contrary to Pt"Bi/GC, Pt/GC electrodes subjected to the same protocols exhibit completely opposite properties being more stabile during potential cycling without HCOOH than in the presence of this acid. Exceptional stability in formic acid oxidation of Pt"Bi/GC catalyst is thus most probably the result of the combination of predominant dehydrogenation path of the reaction, suppressed Bi leaching, and compensation of dissolved Bi from the core as its source due to which surface morphology endured minor changes.
Keywords:
Formic acid oxidation / Pt"Bi/GC catalyst / Pt/GC catalyst / Electrocatalytic stabilitySource:
Journal of Solid State Electrochemistry, 2015, 19, 8, 2223-2233Publisher:
- Springer, New York
Funding / projects:
DOI: 10.1007/s10008-015-2841-8
ISSN: 1432-8488
WoS: 000358546700004
Scopus: 2-s2.0-84938955906
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IHTMTY - JOUR AU - Lović, Jelena AU - Stevanović, Sanja AU - Tripković, Dušan AU - Tripković, Amalija AU - Stevanović, Rade M. AU - Jovanović, Vladislava M. AU - Popović, Ksenija PY - 2015 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1620 AB - Formic acid oxidation was examined on platinum-bismuth deposits on glassy carbon substrate prepared by two-step process, i.e., electrochemical deposition of Bi followed by electrochemical deposition of Pt as described in our previous article (J Electrochem Soc 161:H547-H554, 2014). Upon treatment of as-prepared clusters by slow anodic sweep, bimetallic structure consisting of Bi core occluded by Pt and Bi-oxide was obtained and exhibited significant activity and exceptional stability in HCOOH oxidation. In order to explain such electrocatalytic stability, in this work, the electrochemical properties of Pt"Bi/GC catalyst were investigated applying same protocols in supporting electrolyte with or without HCOOH and compared with Pt/GC. The protocols comprised potentiodynamic, quasi-steady-state, and chronoamperometric measurements combined with the surface characterization by COads stripping voltammetry. Application of potential cycling at Pt"Bi/GC electrode in supporting electrolyte containing HCOOH leads to minor change in surface morphology, mildly leaching of Bi from the electrode surface, and negligible decrease in activity. On the other hand, significant Bi dissolution and considerable decrease in activity are the effects of the same treatment without HCOOH. Contrary to Pt"Bi/GC, Pt/GC electrodes subjected to the same protocols exhibit completely opposite properties being more stabile during potential cycling without HCOOH than in the presence of this acid. Exceptional stability in formic acid oxidation of Pt"Bi/GC catalyst is thus most probably the result of the combination of predominant dehydrogenation path of the reaction, suppressed Bi leaching, and compensation of dissolved Bi from the core as its source due to which surface morphology endured minor changes. PB - Springer, New York T2 - Journal of Solid State Electrochemistry T1 - Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation VL - 19 IS - 8 SP - 2223 EP - 2233 DO - 10.1007/s10008-015-2841-8 ER -
@article{ author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Tripković, Amalija and Stevanović, Rade M. and Jovanović, Vladislava M. and Popović, Ksenija", year = "2015", abstract = "Formic acid oxidation was examined on platinum-bismuth deposits on glassy carbon substrate prepared by two-step process, i.e., electrochemical deposition of Bi followed by electrochemical deposition of Pt as described in our previous article (J Electrochem Soc 161:H547-H554, 2014). Upon treatment of as-prepared clusters by slow anodic sweep, bimetallic structure consisting of Bi core occluded by Pt and Bi-oxide was obtained and exhibited significant activity and exceptional stability in HCOOH oxidation. In order to explain such electrocatalytic stability, in this work, the electrochemical properties of Pt"Bi/GC catalyst were investigated applying same protocols in supporting electrolyte with or without HCOOH and compared with Pt/GC. The protocols comprised potentiodynamic, quasi-steady-state, and chronoamperometric measurements combined with the surface characterization by COads stripping voltammetry. Application of potential cycling at Pt"Bi/GC electrode in supporting electrolyte containing HCOOH leads to minor change in surface morphology, mildly leaching of Bi from the electrode surface, and negligible decrease in activity. On the other hand, significant Bi dissolution and considerable decrease in activity are the effects of the same treatment without HCOOH. Contrary to Pt"Bi/GC, Pt/GC electrodes subjected to the same protocols exhibit completely opposite properties being more stabile during potential cycling without HCOOH than in the presence of this acid. Exceptional stability in formic acid oxidation of Pt"Bi/GC catalyst is thus most probably the result of the combination of predominant dehydrogenation path of the reaction, suppressed Bi leaching, and compensation of dissolved Bi from the core as its source due to which surface morphology endured minor changes.", publisher = "Springer, New York", journal = "Journal of Solid State Electrochemistry", title = "Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation", volume = "19", number = "8", pages = "2223-2233", doi = "10.1007/s10008-015-2841-8" }
Lović, J., Stevanović, S., Tripković, D., Tripković, A., Stevanović, R. M., Jovanović, V. M.,& Popović, K.. (2015). Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation. in Journal of Solid State Electrochemistry Springer, New York., 19(8), 2223-2233. https://doi.org/10.1007/s10008-015-2841-8
Lović J, Stevanović S, Tripković D, Tripković A, Stevanović RM, Jovanović VM, Popović K. Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation. in Journal of Solid State Electrochemistry. 2015;19(8):2223-2233. doi:10.1007/s10008-015-2841-8 .
Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Tripković, Amalija, Stevanović, Rade M., Jovanović, Vladislava M., Popović, Ksenija, "Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation" in Journal of Solid State Electrochemistry, 19, no. 8 (2015):2223-2233, https://doi.org/10.1007/s10008-015-2841-8 . .