Influence of metal?support interaction in Pt/C on CO and methanol oxidation reactions

Hall, Sean C.; Subramanian, Vivek; Teeter, Glenn; Rambabu, B.

doi:10.1016/j.ssi.2004.08.030

Cited by 45 publications

(37 citation statements)

References 7 publications

(10 reference statements)

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“…Thus, crystallite size of Pt does not seem to change practically with the addition of 40wt% MWCNT (or NC). However, this result does not support the findings of Umeda et al [17], Hall et al [2] and Liang et al [1]. That the Pt particle size increases with increasing metal ion loading.…”

Section: X-ray Diffractioncontrasting

confidence: 77%

“…For methanol oxidation in 1.0 N H 2 SO 4 , 30 wt% Pt/C exhibited the highest electro-catalytic activity, whereas the 50 wt% Pt/C showed extremely small current. In a similar study, Hall et al [2] also observed that the Pt particle size increases gradually from 2.0 to 5.8 nm as Pt content increases from 20% to 80wt%. Similar studies for optimizing amount of the support in the case of composite of Pt with new carbon materials such as carbon nanotubes are scarce in the literature.…”

Section: Introductionmentioning

confidence: 63%

“…However, the commercialization of DMFC is obstructed due to sluggish kinetics of methanol oxidation reaction (MOR) [2]. Pt and Pt-based alloys are the best catalysts for the MOR [3][4][5], but they are very costly and undergo poisoning by the oxidation intermediates, particularly CO molecule [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…*Address correspondence to this author at the Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi -221005, India; Tel: +91-542-6701596; Fax: +91-542-2368127; E-mail: rnsbhu@rediffmail.com It is known [1,2,9,17] that the introduction of carbon support greatly influences the Pt particle size and hence the electro-catalytic activities of the catalysts. For instance, Umeda et al [17] prepared carbon supported platinum catalysts with Pt loading of 10, 20, 30, 40 and 50wt% and demonstrated that the Pt size increases gradually with the increase in Pt loading.…”

Section: Introductionmentioning

confidence: 99%

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Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Singh¹

2010

TOCATJ

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Binary nano-composites of Pt and nano-carbon (NC) and Pt and multiwalled carbon nanotube (MWCNT) have been prepared with varied compositions ranging between 20 and 80wt% Pt and investigated them as electrocatalysts for methanol oxidation. The study shows that with the increase in wt% of NC, the apparent electro-catalytic activity of the composite catalyst increases initially, reaches maximum at about 40wt% NC and decreases thereafter. However, the anodic peak current value, estimated as per mg of Pt present in the composite, increases gradually with increasing wt% of NC in the composite. The electrochemical active surface area (EASA) value for Pt in the composite electrode also increases with increasing the carbon composition in the composite. Almost similar effect of the MWCNT addition on the electro-catalytic activity is also observed in the case of Pt-MWCNT composite. Results have shown that an incorporation of carbon (NC/MWCNT) improves both the geometrical as well as the electronic properties of Pt.

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Section: X-ray Diffractioncontrasting

confidence: 77%

Section: Introductionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Singh¹

2010

TOCATJ

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“…Some supports also increase the lifetime of the electrocatalyst by reducing the sintering effect [8]. Supported electrocatalysis may also benefit from enhanced specific activity related to support-electrocatalyst interactions [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic activity of IrO2–RuO2 supported on Sb-doped SnO2 nanoparticles

Marshall

Haverkamp

2010

Electrochimica Acta

180

129

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Electrocatalytic IrO 2 -RuO 2 supported on Sb-doped SnO 2 (ATO) nanoparticles is very active towards the oxygen evolution reaction. The IrO 2 -RuO 2 material is XRD amorphous and exists as clusters on the surface of the ATO.Systematic changes to the surface chemical composition of the ATO as a function of the IrO 2 :RuO 2 ratio suggests an interaction between the IrO 2 -RuO 2 and ATO. Cyclic voltammetry indicates that the electrochemically active surface area of IrO 2 -RuO 2 clusters is maximised when the composition is 75 mol% IrO 2 -25 mol% RuO 2 . Decreasing the loading of IrO 2 -RuO 2 on ATO reduces the electrochemically active surface area, although there is evidence to support a decrease in the clusters size with decreased loading. Tafel slope analysis shows that if the clusters are too small, the kinetics of the oxygen evolution reaction are reduced. Overall, clusters of IrO 2 -RuO 2 on ATO have similar or better performance for the oxygen evolution reaction than many previously reported materials, despite the low quantity of noble metals used in the electrocatalysts. This suggests that these oxides may be of economic

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Ag/ZrO₂/MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction

et al. 2019

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Although the development of non‐platinum electrocatalysts for oxygen reduction reaction (ORR) has made some satisfactory progress, it is still a challenge to get a non‐platinum catalyst with higher activity and better stability. In this study, a novel non‐platinum catalyst composed of silver (Ag) nanoparticles and zirconia (ZrO2) coated on the multi‐walled carbon nanotubes (MWCNTs) catalyst (denoted as Ag/ZrO2/MWCNTs) is obtained by simple hydrothermal and photochemical methods. This catalyst shows more positive onset potential of 0.97 V (vs RHE), higher limiting current density of 6.4 mA cm−2 and lower H2O2 yield of 3.9 % than that of commercial platinum‐carbon (Pt/C) catalyst (0.93 V, 6.0 mA cm−2 and 4.8 % obtained from our test results). Electrochemical tests also show that ORR follows a four‐electron pathway. Moreover, the long‐term stability and methanol tolerance are also better compared with Pt/C. The results of theoretical calculations and the characterizations reveal that the enhanced ORR performance is attributed to the robust skeleton of MWCNTs benefitting for the uniform growth of ZrO2 and the improved conductivity of the catalyst, and the enhanced ability of Ag for O2 adsorption and OH desorption by the introduction of ZrO2. This work may serve as a reference to design and prepare the composite electrocatalysts with the high ORR performance.

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Influence of metal?support interaction in Pt/C on CO and methanol oxidation reactions

Cited by 45 publications

References 7 publications

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Electrocatalytic activity of IrO2–RuO2 supported on Sb-doped SnO2 nanoparticles

Ag/ZrO₂/MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction

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Influence of metal?support interaction in Pt/C on CO and methanol oxidation reactions

Cited by 45 publications

References 7 publications

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Electro-Catalytic Activities of Binary Nano-Composites of Pt and Nano- Carbon/Multiwall Carbon Nanotube for Methanol Electro-Oxidation~!2009-10-29~!2010-01-06~!2010-09-16~!

Electrocatalytic activity of IrO2–RuO2 supported on Sb-doped SnO2 nanoparticles

Ag/ZrO2/MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction

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Resources

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Ag/ZrO₂/MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction