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Formic Acid Oxidation at Platinum-Bismuth Clusters

Authorized Users Only
2014
Authors
Lović, Jelena
Stevanović, Sanja
Tripković, Dušan
Tripkovic, V V
Stevanović, Rade M.
Popović, Ksenija
Jovanović, Vladislava M.
Article (Published version)
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Abstract
Formic acid oxidation was studied on platinum-bismuth deposits on glassy carbon (GC) substrate. The catalysts of equimolar ratio were prepared by potentiostatic deposition using chronocoulometry. Bimetallic structures obtained by two-step process, comprising deposition of Bi followed by deposition of Pt, were characterized by AFM spectroscopy which indicated that Pt crystallizes preferentially onto previously formed Bi particles. The issue of Bi leaching (dissolution) from PtBi catalysts, and their catalytic effect alongside the HCOOH oxidation is rather unresolved. In order to control Bi dissolution, deposits were subjected to electrochemical oxidation, in the relevant potential range and supporting electrolyte, prior to use as catalysts for HCOOH oxidation. Anodic striping charges indicated that along oxidation procedure most of deposited Bi was oxidized. ICP mass spectroscopy analysis of the electrolyte after this electrochemical treatment revealed that Bi was only partly dissolved ...indicating the possibility for formation of some Bi oxide species. Moreover, EDX analysis of the as prepared (Pt"Bi/GC) catalysts and those oxidized confirmed appreciably higher content of oxygen in the latter. Catalysts prepared in this way exhibit about 10 times higher activity for formic acid oxidation in comparison to pure Pt, as revealed both by potentiodynamic and quasy-potentiostatic measurements. This high activity is the result of well-balanced ensemble effect induced by Bi-oxide species interrupting Pt domains. Prolonged cycling and chronoamperometry tests disclosed exceptional stability of the catalyst during formic acid oxidation. The activity is compatible with the activity of previously studied Pt2Bi alloy but the stability is significantly better.

Source:
Journal of the Electrochemical Society, 2014, 161, 9
Publisher:
  • Electrochemical Soc Inc, Pennington
Projects:
  • New approach in designing materials for energy conversion and energy storage systems (RS-172060)

DOI: 10.1149/2.0831409jes

ISSN: 0013-4651

WoS: 000340019600111

Scopus: 2-s2.0-84904917935
[ Google Scholar ]
5
URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1553
Collections
  • Radovi istraživača / Researchers' publications
Institution
IHTM
TY  - JOUR
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Tripkovic, V V
AU  - Stevanović, Rade M.
AU  - Popović, Ksenija
AU  - Jovanović, Vladislava M.
PY  - 2014
UR  - http://cer.ihtm.bg.ac.rs/handle/123456789/1553
AB  - Formic acid oxidation was studied on platinum-bismuth deposits on glassy carbon (GC) substrate. The catalysts of equimolar ratio were prepared by potentiostatic deposition using chronocoulometry. Bimetallic structures obtained by two-step process, comprising deposition of Bi followed by deposition of Pt, were characterized by AFM spectroscopy which indicated that Pt crystallizes preferentially onto previously formed Bi particles. The issue of Bi leaching (dissolution) from PtBi catalysts, and their catalytic effect alongside the HCOOH oxidation is rather unresolved. In order to control Bi dissolution, deposits were subjected to electrochemical oxidation, in the relevant potential range and supporting electrolyte, prior to use as catalysts for HCOOH oxidation. Anodic striping charges indicated that along oxidation procedure most of deposited Bi was oxidized. ICP mass spectroscopy analysis of the electrolyte after this electrochemical treatment revealed that Bi was only partly dissolved indicating the possibility for formation of some Bi oxide species. Moreover, EDX analysis of the as prepared (Pt"Bi/GC) catalysts and those oxidized confirmed appreciably higher content of oxygen in the latter. Catalysts prepared in this way exhibit about 10 times higher activity for formic acid oxidation in comparison to pure Pt, as revealed both by potentiodynamic and quasy-potentiostatic measurements. This high activity is the result of well-balanced ensemble effect induced by Bi-oxide species interrupting Pt domains. Prolonged cycling and chronoamperometry tests disclosed exceptional stability of the catalyst during formic acid oxidation. The activity is compatible with the activity of previously studied Pt2Bi alloy but the stability is significantly better.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Formic Acid Oxidation at Platinum-Bismuth Clusters
VL  - 161
IS  - 9
DO  - 10.1149/2.0831409jes
ER  - 
@article{
author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Tripkovic, V V and Stevanović, Rade M. and Popović, Ksenija and Jovanović, Vladislava M.",
year = "2014",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/1553",
abstract = "Formic acid oxidation was studied on platinum-bismuth deposits on glassy carbon (GC) substrate. The catalysts of equimolar ratio were prepared by potentiostatic deposition using chronocoulometry. Bimetallic structures obtained by two-step process, comprising deposition of Bi followed by deposition of Pt, were characterized by AFM spectroscopy which indicated that Pt crystallizes preferentially onto previously formed Bi particles. The issue of Bi leaching (dissolution) from PtBi catalysts, and their catalytic effect alongside the HCOOH oxidation is rather unresolved. In order to control Bi dissolution, deposits were subjected to electrochemical oxidation, in the relevant potential range and supporting electrolyte, prior to use as catalysts for HCOOH oxidation. Anodic striping charges indicated that along oxidation procedure most of deposited Bi was oxidized. ICP mass spectroscopy analysis of the electrolyte after this electrochemical treatment revealed that Bi was only partly dissolved indicating the possibility for formation of some Bi oxide species. Moreover, EDX analysis of the as prepared (Pt"Bi/GC) catalysts and those oxidized confirmed appreciably higher content of oxygen in the latter. Catalysts prepared in this way exhibit about 10 times higher activity for formic acid oxidation in comparison to pure Pt, as revealed both by potentiodynamic and quasy-potentiostatic measurements. This high activity is the result of well-balanced ensemble effect induced by Bi-oxide species interrupting Pt domains. Prolonged cycling and chronoamperometry tests disclosed exceptional stability of the catalyst during formic acid oxidation. The activity is compatible with the activity of previously studied Pt2Bi alloy but the stability is significantly better.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Formic Acid Oxidation at Platinum-Bismuth Clusters",
volume = "161",
number = "9",
doi = "10.1149/2.0831409jes"
}
Lović J, Stevanović S, Tripković D, Tripkovic VV, Stevanović RM, Popović K, Jovanović VM. Formic Acid Oxidation at Platinum-Bismuth Clusters. Journal of the Electrochemical Society. 2014;161(9)
Lović, J., Stevanović, S., Tripković, D., Tripkovic, V. V., Stevanović, R. M., Popović, K.,& Jovanović, V. M. (2014). Formic Acid Oxidation at Platinum-Bismuth Clusters.
Journal of the Electrochemical SocietyElectrochemical Soc Inc, Pennington., 161(9).
https://doi.org/10.1149/2.0831409jes
Lović Jelena, Stevanović Sanja, Tripković Dušan, Tripkovic V V, Stevanović Rade M., Popović Ksenija, Jovanović Vladislava M., "Formic Acid Oxidation at Platinum-Bismuth Clusters" 161, no. 9 (2014),
https://doi.org/10.1149/2.0831409jes .

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