Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction

2012
Authors
Gajić Krstajić, Ljiljana
Elezović, Nevenka

Babić, Biljana M.

Radmilović, Velimir R.

Krstajić, Nedeljko
Vračar, Ljiljana
Conference object (Published version)
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Platinum nanocatalyst on Sb doped tin oxide support has been synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Sb doped tin oxide support has been synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 42 m2 g-1. Platinum nanocatalyst at modified tin oxide support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. Quite homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was observed. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with ...adsorbed hydrogen species. The oxygen reduction reaction at Pt/SbSnO2 catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. Pt/SbSnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction compared to carbon supported one. Better durability of Pt/SbSnO2 catalyst under repetitive cycling up to 1.4 V vs RHE was confirmed, comparing with Pt on carbon support.
Keywords:
platinum nanocatalyst / tin oxide / Sb doping / oxygen reductionSource:
The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts, 2012, 56-56Publisher:
- Belgrade : Materials Research Society of Serbia
Funding / projects:
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Gajić Krstajić, Ljiljana AU - Elezović, Nevenka AU - Babić, Biljana M. AU - Radmilović, Velimir R. AU - Krstajić, Nedeljko AU - Vračar, Ljiljana PY - 2012 UR - https://dais.sanu.ac.rs/123456789/436 AB - Platinum nanocatalyst on Sb doped tin oxide support has been synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Sb doped tin oxide support has been synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 42 m2 g-1. Platinum nanocatalyst at modified tin oxide support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. Quite homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was observed. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/SbSnO2 catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. Pt/SbSnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction compared to carbon supported one. Better durability of Pt/SbSnO2 catalyst under repetitive cycling up to 1.4 V vs RHE was confirmed, comparing with Pt on carbon support. PB - Belgrade : Materials Research Society of Serbia C3 - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts T1 - Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction SP - 56 EP - 56 UR - https://hdl.handle.net/21.15107/rcub_dais_436 ER -
@conference{ author = "Gajić Krstajić, Ljiljana and Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana", year = "2012", abstract = "Platinum nanocatalyst on Sb doped tin oxide support has been synthesized and characterized as a catalyst for oxygen reduction reaction in 0.5 mol dm-3 HClO4 solution, at 25°C. Sb doped tin oxide support has been synthesized by sol-gel procedure. Synthesized support was characterized by BET (Brunauer, Emmett, Teller), X-ray diffraction and cyclic voltammetry techniques. Specific surface area of the support determined from nitrogen adsorption/desorption isothermal curves was 42 m2 g-1. Platinum nanocatalyst at modified tin oxide support has been synthesized by borohydride reduction method and characterized by XRD and TEM techniques. Quite homogenous Pt nanoparticles distribution over the support, without pronounced particle agglomeration was observed. Electrochemically active surface area of the catalyst was determined from adsorption/desorption charge of hydrogen atoms, after double layer charge substraction, taking into account the reference value of 210 μC cm-2 for full coverage with adsorbed hydrogen species. The oxygen reduction reaction at Pt/SbSnO2 catalyst has been studied by cyclic voltammetry and linear sweep voltammetry at rotating disc electrode. Two different Tafel slope were observed: one close to 60 mV dec-1 in low current density region, and other close to 120 mV dec-1 at high current densities region, as it was already reported in literature for oxygen reduction at pure polycrystalline Pt, as well as at Pt nanoparticles in acid solutions. The specific activities, expressed in terms of kinetic current densities per electrochemically active surface area at the constant potential, of this new catalyst and Vulcan supported Pt were compared. Pt/SbSnO2 catalyst exhibited similar catalytic activity for oxygen reduction reaction compared to carbon supported one. Better durability of Pt/SbSnO2 catalyst under repetitive cycling up to 1.4 V vs RHE was confirmed, comparing with Pt on carbon support.", publisher = "Belgrade : Materials Research Society of Serbia", journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts", title = "Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction", pages = "56-56", url = "https://hdl.handle.net/21.15107/rcub_dais_436" }
Gajić Krstajić, L., Elezović, N., Babić, B. M., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2012). Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts Belgrade : Materials Research Society of Serbia., 56-56. https://hdl.handle.net/21.15107/rcub_dais_436
Gajić Krstajić L, Elezović N, Babić BM, Radmilović VR, Krstajić N, Vračar L. Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:56-56. https://hdl.handle.net/21.15107/rcub_dais_436 .
Gajić Krstajić, Ljiljana, Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Synthesis and characterization of Pt nanocatalyst on tin oxide based support for oxygen reduction" in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):56-56, https://hdl.handle.net/21.15107/rcub_dais_436 .