Development of a Titanium Dioxide-Supported Platinum Catalyst with Ultrahigh Stability for Polymer Electrolyte Membrane Fuel Cell Applications

Huang, Sheng-Yang; Ganesan, P.; Park, Sehkyu; Popov, Branko N.

doi:10.1021/ja904810h

Cited by 506 publications

(354 citation statements)

References 14 publications

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“…[3] Although carbon materials are widely used in fuel cells as the key electrocatalyst supports due to their high specific surface area and conductivity, such carbon supports are vulnerable to undergo electrochemical oxidation under corrosive conditions used during practical operation. Extensive research has been carried out on the improvement of the material of the cathodic catalyst supports, [4][5][6] but little attention has been paid to the catalyst support of the anode. Carbon support oxidation, however, also occurs at the anode side.…”

Section: Introductionmentioning

confidence: 99%

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

et al. 2012

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Durability is an important issue in proton‐exchange membrane fuel cells (PEMFCs). One of the major challenges lies in the degradation caused by the oxidation of the carbon support under high anode potentials (under fuel starvation conditions). Herein, we report highly stable, carbon‐free, WO3 nanoclusters as catalyst supports. The WO3 nanoclusters are synthesized through a hard template method and characterized by means of electron microscopy and electrochemical analysis. The electrochemical studies show that the WO3 nanoclusters have excellent electrochemical stability under a high potential (1.6 V for 10 h) compared to Vulcan XC‐72. Pt nanoparticles supported on these nanoclusters exhibit high and stable electrocatalytic activity for the oxidation of hydrogen. The catalyst shows negligible loss in electrochemically active surface area (ECA) after an accelerated durability test, whereas the ECA of the Pt nanoparticles immobilized on conventional carbon decreases significantly after the same oxidation condition. Therefore, Pt/WO3 could be considered as a promising alternative anode catalyst for PEMFCs.

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Section: Introductionmentioning

confidence: 99%

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

et al. 2012

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“…About 4.4 mL of acetone was collected. The ratio of 18 O-labelled acetone to 16 O acetone was 1.0:1.7 on the basis of the GCmass analysis.…”

Section: Methodsmentioning

confidence: 99%

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Kang¹,

Eum²,

Lee³

et al. 2011

Bulletin of the Korean Chemical Society

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Confined Pt and CoFe 2 O 4 nanoparticles (NPs) in a mesoporous core/shell silica microsphere, Pt-CoFe 2 O 4 @meso-SiO 2 , were prepared using a bi-functional linker molecule. A large number of Pt NPs in Pt-CoFe 2 O 4 @meso-SiO 2 , ranging from 5 to 8 nm, are embedded into the shell and some of them are in close contact with CoFe 2 O 4 NPs. The hydrogenation of cyclohexene over the Pt-CoFe 2 O 4 @meso-SiO 2 microsphere at 25 o C and 1 atm of H 2 yields cyclohexane as a major product. In addition, it gives oxygenated products. Control experiments with 18O-labelled water and acetone suggest that surface-bound oxygen atoms in CoFe 2 O 4 are associated with the formation of the oxygenated products. This oxidation reaction is operative only if CoFe 2 O 4 and Pt NPs are in close contact. The Pt-CoFe 2 O 4 @meso-SiO 2 catalyst is separated simply by a magnet, which can be re-used without affecting the catalytic efficiency.

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“…Electrochemical corrosion of the carbon supports causes the agglomeration and sintering of the Pt catalyst particles, which results in decreased ECSA of the catalyst [91][92].…”

Section: Electrochemical Performancementioning

confidence: 99%

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

Gubán

Borbáth

Pászti

et al. 2015

Applied Catalysis B: Environmental

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Ti-based electroconductive mixed oxides were deposited onto activated carbon by using three different sol-gel-based multistep synthesis routes. As demonstrated by X-ray diffraction, high crystallinity of the tungsten-loaded rutile was achieved by a sequence of annealing in inert atmosphere at 750°C and a short reductive treatment at 650°C.Formation of the rutile phase on the carbon support before the high temperature treatment has been proved to be the prerequisite for complete W incorporation into the rutile lattice. The structural and compositional properties of the mixed oxides were explored by transmission electron microscopy, temperature programmed reduction and X-ray photoelectron spectroscopy. Anode electrocatalysts were formulated by loading the composite of the activated carbon and the Ti-based electroconductive mixed oxides with 40 wt% Pt. Enhanced CO tolerance along with considerable stability was demonstrated for the electrocatalyst prepared using the Ti 0.7 W 0.3 O 2 -C composite material with high degree of W incorporation.

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Development of a Titanium Dioxide-Supported Platinum Catalyst with Ultrahigh Stability for Polymer Electrolyte Membrane Fuel Cell Applications

Cited by 506 publications

References 14 publications

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

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Development of a Titanium Dioxide-Supported Platinum Catalyst with Ultrahigh Stability for Polymer Electrolyte Membrane Fuel Cell Applications

Cited by 506 publications

References 14 publications

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

Contact Info

Product

Resources

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Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity