High performance Pt–Nb2O5/C electrocatalysts for methanol electrooxidation in acidic media

Justin, P.; Charan, P. Hari Krishna; Rao, G. Ranga

doi:10.1016/j.apcatb.2010.09.001

Cited by 89 publications

(82 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results are also obtained for the C-Pt catalysts. However, the spectra of the C-Pt catalysts present a small peak corresponding to C1s signal, revealing the deposition of C. It is noted that the O1s peaks appear in all the spectra, 21,22 possibly suggesting that the prepared samples contain impurities. However, the amounts of impurities in the C-Pt samples are almost the same as those in the Pt sample, because of the similar magnitudes of O1s peak.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Post-annealing Effects on Reaction Selectivity of Methanol Oxidation at Carbon-based Platinum Co-sputtered Electrocatalyst

et al. 2015

View full text Add to dashboard Cite

A carbon with Pt (C-Pt) catalyst was prepared by a co-sputtering technique. Pt4f peaks of the prepared sample were observed at higher binding energies than those of a Pt sputtered sample. These Pt4f peaks shifted to the low binding energies with an increase in a post-annealing temperature, whereas the C1s peak position was unchanged. For the C-Pt catalyst as sputter-deposited, the methanol oxidation performance was enhanced by the presence of O 2 . This O 2 -enhnaced methanol oxidation was suppressed by the post-annealing at 160°C, while the reaction selectivity of the methanol oxidation was retained.

show abstract

Section: Resultsmentioning

confidence: 99%

“…In this figure, the data of the Pt catalyst is also represented for reference. For the Pt catalyst, the observed peaks are assigned to Pt4f, Pt4d, Au4f, and Au4d signals, 21,22 which originate from the sputtered Pt and the Au flag electrode. Similar results are also obtained for the C-Pt catalysts.…”

Section: Resultsmentioning

confidence: 99%

Post-annealing Effects on Reaction Selectivity of Methanol Oxidation at Carbon-based Platinum Co-sputtered Electrocatalyst

et al. 2015

View full text Add to dashboard Cite

show abstract

“…This is an indication for the fact that incorporation of ZrO 2 affects the crystalline lattice of platinum; no diffraction planes related to ZrO 2 phase were found. This can be due to the low concentration of ZrO 2 or partial ZrO 2 entering into Pt crystalline lattice [45][46][47][48]. For Pt-TiO 2 /C electrocatalyst we can notice that; Pt(111) Pt (200) and Pt(220) diffraction planes are found to be at higher 2θ values when compared to those in Pt/C -1 as in Table 1 resulting in a crystal lattice contraction, it is also noticed from Fig.1 (a) that; no characteristic peak for TiO 2 is found in XRD pattern, this could be interpreted by the existence of the titanium oxide in an amorphous form [49].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Nano Structured Pt−MOx/C for Oxygen Reduction Reaction in Acidic Medium

El–Khatib¹,

Fetohi

Amin

et al. 2017

Egypt. J. Chem.

View full text Add to dashboard Cite

Pt-MOx/C (M = Ti, Ce or Zr) electrocatalysts was prepared for the purpose of developing a cheap and efficient electrocatalysts for oxygen reduction reaction (ORR) using a mixture of ethylene glycol and sodium borohydride (EG + NaBH 4 ) as areducing agent. Pt/C was studied for estimation of metal oxides effect.Pt-CeO 2 /C-1 was prepared through single reducing agent ethylene glycol for studying the effect of changing the reducing agent on the activity of electrocatalysts toward ORR and for studying ORR kinetics. The electrocatalytic activity of the prepared electrocatalysts towards (ORR) was evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) on a rotating disc electrode (RDE). Pt-ZrO 2 /C shows the best activity towards ORR among the studied electrocatalysts; the oxygen reduction current density for it is about 5 times; (5.84 mAcm -2 ) as that of Pt/C (1.26 mAcm -2 ). Pt-CeO 2 /C showed better ORR activity (2.24 mAcm -2 ) than Pt-CeO 2 /C-1(1.58 mAcm -2 ) indicating the great effect of changing the reducing agent not only on the electrocatalyst behavior towards ORR but also its particle size and the metal content of the resultant electrocatalysts. Oxygen reduction mechanism for Pt-CeO 2 /C and Pt-CeO 2 /C-1 was evaluated using through KouteckyLevich, they showed first-order kinetics with ORR not controlled solely by diffusion. XRD, EDX and TEM analyses were used to characterize the prepared electrocatalyst.

show abstract

“…In this paper we summarize the recent progress from our laboratory on the anode electrocatalysts for methanol oxidation. By utilizing an intermittent microwave heating (IMH) method, we have succeeded in incorporating V 2 O 5 , Nb 2 O 5 and MoO 3 oxides over carbon black (Vulcan XC-72) more effectively in a short span of time [13][14][15]. The peak current density for methanol electro-oxidation in acidic media is higher on both Pt-MoO 3 /C and Pt-Nb 2 O 5 /C electrodes than Pt-Ru/C electrode.…”

Section: Introductionmentioning

confidence: 93%

“…It was then introduced into a microwave oven (Sharp NN-S327 WF, 2,450 MHz, and 1,100 W) and heated in 6 cycles, each cycle for 20 s with a pause of 60 s between heating cycles. In a second step, Pt was loaded on the oxide/C composites by a modified microwave-assisted polyol process [13][14][15][16].…”

Section: Preparation Of Electrocatalysts and Electrode Fabricationmentioning

confidence: 99%

Metal Oxide Promoted Electrocatalysts for Methanol Oxidation

2011

Self Cite

View full text Add to dashboard Cite

An important research target in DMFCs is to find better catalyst materials that are cheaper, less-prone to poisoning and more catalytically active. In this context, metal oxides with good catalytic properties and stronger interaction with Pt nanoparticles can generate active interfacial regions for electrocatalysis. Pt catalysts promoted by certain metal oxides show enhanced methanol electro-oxidation activity and CO tolerance behavior. In this paper we summarize the recent progress from our laboratory which explored the possibility of developing Pt-MoO 3 /C and Pt-Nb 2 O 5 /C electrocatalysts in acidic media, and Pt-V 2 O 5 /C electrocatalyst in alkaline media for direct electro-oxidation of methanol. The oxide electrocatalysts have been prepared by a fast and efficient method of loading the metal oxide on carbon black (Vulcan XC-72) employing an intermittent microwave heating (IMH) method. These materials are found to achieve higher activity and stability towards methanol electro-oxidation.

show abstract

High performance Pt–Nb2O5/C electrocatalysts for methanol electrooxidation in acidic media

Cited by 89 publications

References 38 publications

Post-annealing Effects on Reaction Selectivity of Methanol Oxidation at Carbon-based Platinum Co-sputtered Electrocatalyst

Post-annealing Effects on Reaction Selectivity of Methanol Oxidation at Carbon-based Platinum Co-sputtered Electrocatalyst

Preparation and Characterization of Nano Structured Pt−MOx/C for Oxygen Reduction Reaction in Acidic Medium

Metal Oxide Promoted Electrocatalysts for Methanol Oxidation

Contact Info

Product

Resources

About