Formic Acid Oxidation at Platinum-Bismuth Clusters
Само за регистроване кориснике
2014
Аутори
Lović, JelenaStevanović, Sanja
Tripković, Dušan
Tripković, Vladimir
Stevanović, Rade M.
Popović, Ksenija
Jovanović, Vladislava M.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Извор:
Journal of the Electrochemical Society, 2014, 161, 9Издавач:
- Electrochemical Soc Inc, Pennington
Финансирање / пројекти:
- Нов приступ дизајнирању материјала за конверзију и складиштење енергије (RS-MESTD-Basic Research (BR or ON)-172060)
DOI: 10.1149/2.0831409jes
ISSN: 0013-4651
WoS: 000340019600111
Scopus: 2-s2.0-84904917935
Институција/група
IHTMTY - JOUR AU - Lović, Jelena AU - Stevanović, Sanja AU - Tripković, Dušan AU - Tripković, Vladimir AU - Stevanović, Rade M. AU - Popović, Ksenija AU - Jovanović, Vladislava M. PY - 2014 UR - https://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 Tripković, Vladimir and Stevanović, Rade M. and Popović, Ksenija and Jovanović, Vladislava M.", year = "2014", 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., Tripković, V., Stevanović, R. M., Popović, K.,& Jovanović, V. M.. (2014). Formic Acid Oxidation at Platinum-Bismuth Clusters. in Journal of the Electrochemical Society Electrochemical Soc Inc, Pennington., 161(9). https://doi.org/10.1149/2.0831409jes
Lović J, Stevanović S, Tripković D, Tripković V, Stevanović RM, Popović K, Jovanović VM. Formic Acid Oxidation at Platinum-Bismuth Clusters. in Journal of the Electrochemical Society. 2014;161(9). doi:10.1149/2.0831409jes .
Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Tripković, Vladimir, Stevanović, Rade M., Popović, Ksenija, Jovanović, Vladislava M., "Formic Acid Oxidation at Platinum-Bismuth Clusters" in Journal of the Electrochemical Society, 161, no. 9 (2014), https://doi.org/10.1149/2.0831409jes . .