Pt nanoparticles supported on NiTiO3/C as electrocatalyst towards high performance Methanol Oxidation Reaction

Velumani, Thiagarajan; Manoharan, Ramasamy; Palaniswamy, Karthikeyan; Nikhila, Eliyan; Hernández-Ramírez, A.; Rodríguez-Varela, F.J.

doi:10.1016/j.ijhydene.2017.01.017

Cited by 29 publications

(22 citation statements)

References 69 publications

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“…The effect of operating parametres on the performance of the DMFCs has been examined for Pt-NiTiO 3 /C (anode) and commercial Pt/C (cathode) catalysts. It can be noted in an earlier section that the variation in the peak power performances between Pt-NiTiO 3 /C and Pt-Ru-NiTiO 3 /C is minimum, while at the same time our previous studies [37,41] ensured titante based metal oxides play a significant effect on enhanced performance. Hence PtNiTiO 3 /C material only has been considered for further studies.…”

Section: Effect Of Cell Operating Temperaturementioning

confidence: 67%

“…The catalyst ink was prepared for all the catalyst powders using Nafion ionomer (taken from 10 wt. % of Nafion solution, Sigma Aldrich), isopropyl alcohol and deionized water used as a solvent [37]. Initially 20 mg of catalyst powder was weighed and put into the container followed by the addition of deionized water in the mass ratio 20:1, 5 wt.…”

Section: Catalyst Ink Preparationmentioning

confidence: 99%

“…The whole thing was wrapped with Teflon sheet and placed in a hot press (Orione, India) at The reaction mechanism (1) of bifunctional electrocatalyst was proposed in our earlier work [37]. Due to the strong interaction between Pt and NiTiO 3 particles the MOR activity was improved and the high power density of Pt-NiTiO 3 /C shows high performance towards…”

Section: Pre-treatment Of Nafion Membrane and Mea Fabricationmentioning

confidence: 99%

“…Various research groups have demonstrated the incorporation of some of the metal oxides (TiO 2 , IrO 2 , CeO 2 , V 2 O 5 , WO x , MoO 3, NiTiO 3 ) as active support material in the anode electrocatalysts for the improvement of the MOR activity in the DMFCs [30][31][32][33][34][35][36][37]. In this aspect, TiO 2 has been recognized as one of the promising MOR reaction promoters with high stability under acidic environment.…”

Section: Introductionmentioning

confidence: 99%

“…Kang et al [40] showed that the MOR activity of the catalyst and performance of the electrode with Pt 0.5 -Ru 0.4 M (M = Ni, Sn,and Mo) alloy catalyst was higher than Pt-Ru. Recently, we showed [37,41] that the presence of NiTiO 3 added with Pt/C and PtRu/C (the alloy with the particular composition Pt 0.7 Ru 0.3 ) promotes the anodic MOR activity and catalysts durability. We also proposed that such higher electrocatlytic activity is due to the promotional effect exhibited by surface Ru oxide and NiTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Thiagarajan

Karthikeyan

Thanarajan

et al. 2019

International Journal of Hydrogen Energy

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In this present work, the effect of anode electrocatalyst materials is investigated by adding NiTiO 3 with Pt/C and Pt-Ru/C for the performance enhancement of direct methanol fuel cells (DMFCs). The supportive material NiTiO 3 /C has been synthesized first by wet chemical method followed by incorporation of Pt and Pt-Ru separately. Experiments are conducted with the combination of four different electrocatalyst materials on the anode side (Pt/C, Pt-NiTiO 3 /C, PtRu/C, Pt-Ru-NiTiO 3 /C) and with commercial 20 wt. % Pt/C on the cathode side; 0.5 mg pt /cm 2 loading is maintained on both sides. The performance tests of the above catalysts are conducted on 5 cm 2 active area with various operating conditions like cell operating temperatures, methanol/water molar concentrations and reactant flow rates. Best performing operating conditions have been optimized. The maximum peak power densities attained are 13.30 mW/cm 2 (26.6 mW/mg pt) and 14.60 mW/cm 2 (29.2 mW/mg pt) for Pt-NiTiO 3 /C and Pt-Ru-NiTiO 3 /C at 80 , respectively, with 0.5 M concentration of methanol and fuel flow rate of 3 ml/min (anode) and oxygen flow rate of 100 ml/min (cathode). Besides, 5 h short term stability tests have been conducted for PtRu/C and Pt-NiTiO 3 /C. The overall results suggest that the incorporation of NiTiO 3 /C supportive material to Pt and Pt-Ru appears to make a promising anode electrocatalysts for the enhanced DMFC performances.

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Section: Effect Of Cell Operating Temperaturementioning

confidence: 67%

Section: Catalyst Ink Preparationmentioning

confidence: 99%

Section: Pre-treatment Of Nafion Membrane and Mea Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Thiagarajan

Karthikeyan

Thanarajan

et al. 2019

International Journal of Hydrogen Energy

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Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

et al. 2022

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Nowadays, the high cost and poor durability of commercial catalyst Pt/C for methanol oxidation reaction have impeded the further development of direct methanol fuel cells. Herein, we firstly introduced a delafossite CuCoO2 to act as the support of noble metal Pt. The strong metal support interaction between Pt and CuCoO2, abundant hydroxide species and active sites on the surface of catalyst may be the key factors for enhanced performances of methanol oxidation. Pt‐CuCoO2/C achieved a mass activity of 1.16 A mgPt−1, which obtained 3.02 times enhancement compared with commercial Pt/C (0.38 A mgPt−1). The If/Ib value of Pt‐CuCoO2/C is 1.96, much higher than that of Pt/C (0.76), demonstrating favorable anti‐poisoning ability. After 200 times cycling, Pt‐CuCoO2/C still maintained 77.1 % of its initial activity, exhibiting superior COads intermediate tolerance and stability. Low cost, better performances and stability of Pt‐CuCoO2/C reveal that it can be seen as a hopeful catalyst.

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Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

Moses,

Bastia,

Kumar

et al. 2023

ChemistrySelect

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Modification of nickel titanate nanocubes with metal nanocrystals is a viable approach to build a Schottky heterojunction for efficient hydrogen generation. The deconvoluted XPS spectrum of Pt 4 f (peaks at 72.0 and 75.5 eV corresponding to Pt° and Pt2+) and Pd 3d3/2 (335.4 and 336.7 eV corresponding to Pd° and Pd2+) and presence of lattice fringes in HRTEM at 2.19 Å of Pd°, reveal the formation of heterojunction in Pd−NiTiO3 and Pt−NiTiO3 nanocubes. The solar hydrogen generation investigation exhibits 2‐fold enhancement in HER (130 and 165 μmol g−1 h−1 while using Pt−NiTiO3 and Pd−NiTiO3, respectively) than that of bare NiTiO3 (88 μmol g−1 h−1). The creation of heterojunctions between titanates and metal nanoparticles, facilitating efficient transport of photo‐generated electron to empty or partially filled d or f orbitals of metals, thereby lowering electron‐hole recombination rate, as revealed by shorter average lifetime 29 ns (Pd−NiTiO3) than 64 ns (NiTiO3). Further, the unison of faster charge transfer kinetics as revealed by the Nyquist plot, more negative flatband potential (Efb −0.3 vs. RHE) leading to appropriate band bending, reduced overpotential requirement, higher oxygen vacancies (19.46 %) and uniform dispersion of metal atoms on NiTiO3 surfaces that are acting as trapping centers etc. are enabling improved hydrogen generation in the case of Pd−NiTiO3.

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Pt nanoparticles supported on NiTiO3/C as electrocatalyst towards high performance Methanol Oxidation Reaction

Cited by 29 publications

References 69 publications

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon

Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

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Pt nanoparticles supported on NiTiO3/C as electrocatalyst towards high performance Methanol Oxidation Reaction

Cited by 29 publications

References 69 publications

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO2 on Carbon

Surface Modification of Nickel Titanate Nanocubes with Ultra‐small Palladium and Platinum Nanocrystals to Promote Solar Hydrogen Generation under Visible Light

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Resources

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Enhanced Methanol Electrooxidation Performance Based on Pt Cluster‐Decorated CuCoO₂ on Carbon