Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration
Само за регистроване кориснике
2019
Аутори
Krstajić Pajić, Mila N.Stevanović, Sanja I.
Radmilović, Vuk V.
Zabinski, Piotr
Elezović, Nevenka R.
Radmilović, Velimir R.
Gojković, Snežana Lj.
Jovanović, Vladislava M.
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Formic acid is one of the most promising small organic molecules that can be used as fuel in polymer
electrolyte fuel cells. These systems are recognized as high-efficiency energy conversion devices which could
offer energy generated from electrochemical processes. At carbon supported platinum nanoparticles as state
of the art anodic catalysts formic acid oxidation reaction (FAOR) proceeds through a dual path mechanism
that includes the formation of CO in the indirect reaction pathway. Since CO is a catalytic poison, the best
way to address this problem is to synthesize catalysts that would either provide prompt CO oxidation and
removal, or favour the direct reaction pathway to completely avoid CO formation and electrode poisoning.
PtAu systems are considered as efficient catalysts for FAOR due to the ensemble effect of Au on Pt, however
the optimal ratio of these two elements is still quite vague. Given the experience with water in oil
microemulsion synthesis for preparation ...of shape controlled Pt nanoparticles,1 bimetallic PtAu/C
nanocatalysts were synthesized by the same procedure, following a simultaneous precursor reduction
methodology.2 The amount of the capping agent used, was varied in order to cause formation of
nanoparticles with different shape (cubic or tetrahedron like). Addition of a very low, but very finely dispersed
amount of Au significantly increases the catalytic activity, and also affects kinetic of the particle growth,
influencing the particle shape. Ordered structure of these particles contributes to their stability as well. These
results were obtained by Electrochemical and High Resolution Transmission Electron Microscopy
characterization (HRTEM) with Energy Dispersive X-ray Spectroscopy (EDXS), along with X-Ray Diffraction and
(XRD) and X-Ray Photoelectron Spectroscopy (XPS).
Извор:
Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019, 2019, 119-Издавач:
- International Association of Physical Chemists
Финансирање / пројекти:
- Нов приступ дизајнирању материјала за конверзију и складиштење енергије (RS-MESTD-Basic Research (BR or ON)-172060)
- COST Action MP 1407
Институција/група
Tehnološko-metalurški fakultetTY - CONF AU - Krstajić Pajić, Mila N. AU - Stevanović, Sanja I. AU - Radmilović, Vuk V. AU - Zabinski, Piotr AU - Elezović, Nevenka R. AU - Radmilović, Velimir R. AU - Gojković, Snežana Lj. AU - Jovanović, Vladislava M. PY - 2019 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7311 AB - Formic acid is one of the most promising small organic molecules that can be used as fuel in polymer electrolyte fuel cells. These systems are recognized as high-efficiency energy conversion devices which could offer energy generated from electrochemical processes. At carbon supported platinum nanoparticles as state of the art anodic catalysts formic acid oxidation reaction (FAOR) proceeds through a dual path mechanism that includes the formation of CO in the indirect reaction pathway. Since CO is a catalytic poison, the best way to address this problem is to synthesize catalysts that would either provide prompt CO oxidation and removal, or favour the direct reaction pathway to completely avoid CO formation and electrode poisoning. PtAu systems are considered as efficient catalysts for FAOR due to the ensemble effect of Au on Pt, however the optimal ratio of these two elements is still quite vague. Given the experience with water in oil microemulsion synthesis for preparation of shape controlled Pt nanoparticles,1 bimetallic PtAu/C nanocatalysts were synthesized by the same procedure, following a simultaneous precursor reduction methodology.2 The amount of the capping agent used, was varied in order to cause formation of nanoparticles with different shape (cubic or tetrahedron like). Addition of a very low, but very finely dispersed amount of Au significantly increases the catalytic activity, and also affects kinetic of the particle growth, influencing the particle shape. Ordered structure of these particles contributes to their stability as well. These results were obtained by Electrochemical and High Resolution Transmission Electron Microscopy characterization (HRTEM) with Energy Dispersive X-ray Spectroscopy (EDXS), along with X-Ray Diffraction and (XRD) and X-Ray Photoelectron Spectroscopy (XPS). PB - International Association of Physical Chemists C3 - Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019 T1 - Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration SP - 119 UR - https://hdl.handle.net/21.15107/rcub_technorep_7311 ER -
@conference{ author = "Krstajić Pajić, Mila N. and Stevanović, Sanja I. and Radmilović, Vuk V. and Zabinski, Piotr and Elezović, Nevenka R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.", year = "2019", abstract = "Formic acid is one of the most promising small organic molecules that can be used as fuel in polymer electrolyte fuel cells. These systems are recognized as high-efficiency energy conversion devices which could offer energy generated from electrochemical processes. At carbon supported platinum nanoparticles as state of the art anodic catalysts formic acid oxidation reaction (FAOR) proceeds through a dual path mechanism that includes the formation of CO in the indirect reaction pathway. Since CO is a catalytic poison, the best way to address this problem is to synthesize catalysts that would either provide prompt CO oxidation and removal, or favour the direct reaction pathway to completely avoid CO formation and electrode poisoning. PtAu systems are considered as efficient catalysts for FAOR due to the ensemble effect of Au on Pt, however the optimal ratio of these two elements is still quite vague. Given the experience with water in oil microemulsion synthesis for preparation of shape controlled Pt nanoparticles,1 bimetallic PtAu/C nanocatalysts were synthesized by the same procedure, following a simultaneous precursor reduction methodology.2 The amount of the capping agent used, was varied in order to cause formation of nanoparticles with different shape (cubic or tetrahedron like). Addition of a very low, but very finely dispersed amount of Au significantly increases the catalytic activity, and also affects kinetic of the particle growth, influencing the particle shape. Ordered structure of these particles contributes to their stability as well. These results were obtained by Electrochemical and High Resolution Transmission Electron Microscopy characterization (HRTEM) with Energy Dispersive X-ray Spectroscopy (EDXS), along with X-Ray Diffraction and (XRD) and X-Ray Photoelectron Spectroscopy (XPS).", publisher = "International Association of Physical Chemists", journal = "Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019", title = "Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration", pages = "119", url = "https://hdl.handle.net/21.15107/rcub_technorep_7311" }
Krstajić Pajić, M. N., Stevanović, S. I., Radmilović, V. V., Zabinski, P., Elezović, N. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2019). Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration. in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019 International Association of Physical Chemists., 119. https://hdl.handle.net/21.15107/rcub_technorep_7311
Krstajić Pajić MN, Stevanović SI, Radmilović VV, Zabinski P, Elezović NR, Radmilović VR, Gojković SL, Jovanović VM. Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration. in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019. 2019;:119. https://hdl.handle.net/21.15107/rcub_technorep_7311 .
Krstajić Pajić, Mila N., Stevanović, Sanja I., Radmilović, Vuk V., Zabinski, Piotr, Elezović, Nevenka R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration" in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019 (2019):119, https://hdl.handle.net/21.15107/rcub_technorep_7311 .