Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate
Reakcija redukcije kiseonika na elektrohemijski istaloženim tankim slojevima platine na (Nb-Ti)2alc nosaču
Authors
Petričević, AleksandarJović, Vladimir D.
Krstajić Pajić, Mila N.
Zabinski, Piotr

Elezović, Nevenka R.

Article (Published version)
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Show full item recordAbstract
Catalytic activity towards the oxygen reduction reaction (ORR) in 0.5 M H2SO4 was investigated at sub-monolayers and ultra-thin layers (corresponding to 10, 30 and 100 monolayers, (MLs)) of Pt electrochemically deposited on (Nb-Ti)2AlC substrate. Electrochemical deposition of Pt layers on (Nb-Ti)2AlC substrate was achieved from the solution containing 3 mM K2PtCl4 + 0.5 M NaCl (pH 4) under the conditions of convective diffusion (RPM = 400) using linear sweep voltammetry (LSV) at a sweep rate of 2 mV s-1, by determining limiting potential for deposition of each Pt sample from the QPt vs. E curves. The Pt samples were characterized X-ray photoelectron spectroscopy (XPS). XPS analysis showed that practically the whole surface of (Nb-Ti)2AlC substrate is covered with homogeneous layer of Pt, while Pt ion reduction was complete to metallic form – Pt(0) valence state. Then oxygen reduction was studied at rotating disc electrode by cyclic voltammetry and linear sweep voltammetry. Two differen...t Tafel slopes were observed, one close to 60 mV dec-1 in low current densities region and second one ~ 120 mV dec-1 in high current densities region. This novel catalyst exhibited higher activity in comparison to carbon supported one, in terms of mass activity – kinetic current density normalized to Pt loading.
Keywords:
acid solution / oxygen reduction / Platinum electrodepositionSource:
Materials Protection, 2022, 63, 2, 153-164Publisher:
- Engineers Society for Corrosion
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200135 (University of Belgrade, Faculty of Technology and Metallurgy) (RS-200135)
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Petričević, Aleksandar AU - Jović, Vladimir D. AU - Krstajić Pajić, Mila N. AU - Zabinski, Piotr AU - Elezović, Nevenka R. PY - 2022 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5353 AB - Catalytic activity towards the oxygen reduction reaction (ORR) in 0.5 M H2SO4 was investigated at sub-monolayers and ultra-thin layers (corresponding to 10, 30 and 100 monolayers, (MLs)) of Pt electrochemically deposited on (Nb-Ti)2AlC substrate. Electrochemical deposition of Pt layers on (Nb-Ti)2AlC substrate was achieved from the solution containing 3 mM K2PtCl4 + 0.5 M NaCl (pH 4) under the conditions of convective diffusion (RPM = 400) using linear sweep voltammetry (LSV) at a sweep rate of 2 mV s-1, by determining limiting potential for deposition of each Pt sample from the QPt vs. E curves. The Pt samples were characterized X-ray photoelectron spectroscopy (XPS). XPS analysis showed that practically the whole surface of (Nb-Ti)2AlC substrate is covered with homogeneous layer of Pt, while Pt ion reduction was complete to metallic form – Pt(0) valence state. Then oxygen reduction was studied at rotating disc electrode by cyclic voltammetry and linear sweep voltammetry. Two different Tafel slopes were observed, one close to 60 mV dec-1 in low current densities region and second one ~ 120 mV dec-1 in high current densities region. This novel catalyst exhibited higher activity in comparison to carbon supported one, in terms of mass activity – kinetic current density normalized to Pt loading. PB - Engineers Society for Corrosion T2 - Materials Protection T1 - Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate T1 - Reakcija redukcije kiseonika na elektrohemijski istaloženim tankim slojevima platine na (Nb-Ti)2alc nosaču EP - 164 IS - 2 SP - 153 VL - 63 DO - 10.5937/zasmat2202153P ER -
@article{ author = "Petričević, Aleksandar and Jović, Vladimir D. and Krstajić Pajić, Mila N. and Zabinski, Piotr and Elezović, Nevenka R.", year = "2022", abstract = "Catalytic activity towards the oxygen reduction reaction (ORR) in 0.5 M H2SO4 was investigated at sub-monolayers and ultra-thin layers (corresponding to 10, 30 and 100 monolayers, (MLs)) of Pt electrochemically deposited on (Nb-Ti)2AlC substrate. Electrochemical deposition of Pt layers on (Nb-Ti)2AlC substrate was achieved from the solution containing 3 mM K2PtCl4 + 0.5 M NaCl (pH 4) under the conditions of convective diffusion (RPM = 400) using linear sweep voltammetry (LSV) at a sweep rate of 2 mV s-1, by determining limiting potential for deposition of each Pt sample from the QPt vs. E curves. The Pt samples were characterized X-ray photoelectron spectroscopy (XPS). XPS analysis showed that practically the whole surface of (Nb-Ti)2AlC substrate is covered with homogeneous layer of Pt, while Pt ion reduction was complete to metallic form – Pt(0) valence state. Then oxygen reduction was studied at rotating disc electrode by cyclic voltammetry and linear sweep voltammetry. Two different Tafel slopes were observed, one close to 60 mV dec-1 in low current densities region and second one ~ 120 mV dec-1 in high current densities region. This novel catalyst exhibited higher activity in comparison to carbon supported one, in terms of mass activity – kinetic current density normalized to Pt loading.", publisher = "Engineers Society for Corrosion", journal = "Materials Protection", title = "Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate, Reakcija redukcije kiseonika na elektrohemijski istaloženim tankim slojevima platine na (Nb-Ti)2alc nosaču", pages = "164-153", number = "2", volume = "63", doi = "10.5937/zasmat2202153P" }
Petričević, A., Jović, V. D., Krstajić Pajić, M. N., Zabinski, P.,& Elezović, N. R.. (2022). Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate. in Materials Protection Engineers Society for Corrosion., 63(2), 153-164. https://doi.org/10.5937/zasmat2202153P
Petričević A, Jović VD, Krstajić Pajić MN, Zabinski P, Elezović NR. Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate. in Materials Protection. 2022;63(2):153-164. doi:10.5937/zasmat2202153P .
Petričević, Aleksandar, Jović, Vladimir D., Krstajić Pajić, Mila N., Zabinski, Piotr, Elezović, Nevenka R., "Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate" in Materials Protection, 63, no. 2 (2022):153-164, https://doi.org/10.5937/zasmat2202153P . .