Insights into the stability of Pt nanoparticles supported on antimony-doped tin oxide in different potential ranges

Cognard, Gwenn; Ozouf, Guillaume; Beauger, Christian; Dubau, Laëtitia; López‐Haro, Miguel; Chatenet, Marian; Maillard, Frédéric

doi:10.1016/j.electacta.2017.05.178

Cited by 44 publications

(60 citation statements)

References 59 publications

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Section: Resultsmentioning

confidence: 99%

“…The stability of ATO as a catalyst support for proton exchange membrane fuel cells has been discussed in the literature . Surface segregation of antimony caused by the preparation method or by potential cycling were discussed to lead to Sb‐dissolution in an acidic environment. This results in a reduced conductivity of the surface of the obtained core–shell structure that can directly affect the electrocatalytic performance of attached catalyst nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

“…Surface segregation of antimony caused by the preparation method or by potential cycling were discussed to lead to Sb‐dissolution in an acidic environment. This results in a reduced conductivity of the surface of the obtained core–shell structure that can directly affect the electrocatalytic performance of attached catalyst nanoparticles . Geiger et al recently investigated the corrosion stability of tin‐oxide based catalysts (ATO, ITO, FTO) in acidic media and under applied potentials.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Böhm

Beetz

Schuster

et al. 2019

Adv Funct Materials

114

105

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A multistep synthesis procedure for the homogeneous coating of a complex porous conductive oxide with small Ir nanoparticles is introduced to obtain a highly active electrocatalyst for water oxidation. At first, inverse opal macroporous Sb doped SnO 2 (ATO) microparticles with defined pore size, composition, and open-porous morphology are synthesized that reach a conductivity of ≈3.6 S cm −1 and are further used as catalyst support. ATO-supported iridium catalysts with a controlled amount of active material are prepared by solvothermal reduction of an IrO x colloid in the presence of the porous ATO particles, whereby homogeneous coating of the complete outer and inner surface of the particles with nanodispersed metallic Ir is achieved. Thermal oxidation leads to the formation of ATO-supported IrO 2 nanoparticles with a void volume fraction of ≈89% calculated for catalyst thin films based on scanning transmission electron microscope tomography data and microparticle size distribution. A remarkably low Ir bulk density of ≈0.08 g cm −3 for this supported oxide catalyst architecture with 25 wt% Ir is determined. This highly efficient oxygen evolution reaction catalyst reaches a current density of 63 A g Ir −1 at an overpotential of 300 mV versus reversible hydrogen electrode, significantly exceeding a commercial TiO 2 -supported IrO 2 reference catalyst under the same measurement conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Böhm

Beetz

Schuster

et al. 2019

Adv Funct Materials

114

105

View full text Add to dashboard Cite

show abstract

“…Due to the low conductivity, these materials usually should be doped by conductive dopants (i.e., Sb, In, Nb, etc.) [10] after which is prone to be dissolved in acidic media at high cathodic and anodic potentials [11,12]. The promising strategy aimed to mitigate carbon supports limitations is using of carbon-based hybrid supports.…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Composition and Structure of Carbon-Supported Pt-SnO2 Hetero-Clusters onto Their Electrocatalytic Activity and Durability in PEMFC

et al. 2019

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A detailed study of the structure, morphology and electrochemical properties of Pt/C and Pt/x-SnO2/C catalysts synthesized using a polyol method has been provided. A series of catalysts supported on the SnO2-modified carbon was synthesized and studied by various methods including transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electrochemical methods, and fuel cell testing. The SnO2 content varies from 5 to 40 wt %. The TEM images, XRD and XPS analysis suggested the Pt-SnO2 hetero-clusters formation. The SnO2 content of ca. 10% ensures an optimal catalytic layer structure and morphology providing uniform distribution of Pt-SnO2 clusters over the carbon support surface. Pt/10wt %-SnO2/C catalyst demonstrates increased activity and durability toward the oxygen reduction reaction (ORR) in course of accelerated stress testing due to the high stability of SnO2 and its interaction with Pt. The polymer electrolyte membrane fuel cell current–voltage performance of the Pt/10wt %-SnO2/C is comparable with those of Pt/C, however, higher durability is expected.

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“…Catalysts using graphene as support materials has better electrochemical activity and stability than commercial Pt/C . Another strategy is to substitute the carbon materials with some metal oxide materials . Metal oxide is more stable than carbon in most situations, due to its excellent corrosion resistance and great mechanical strength .…”

Section: Introductionmentioning

confidence: 99%

Pt Supported on Carbon‐coating Antimony Tin Oxide as Anode Catalyst for Direct Methanol Fuel Cell

et al. 2018

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A qualified support material for Pt must has numerous deposition sites for Pt nanoparticles and great electrical conductivity. Metal oxide materials are potential support materials for Pt nanoparticles. However, they have less deposition sites for Pt and worse electronic conductivity than carbon. Carbon over the surface of metal oxide materials can improve the above shortage. In this paper, antimony tin oxide (ATO) coated by carbon layer has been successfully prepared by plasma enhanced chemical vapor deposition method (PECVD). PECVD can provide a brief approach to enwrap metal oxide with carbon at low temperatures. Besides, it becomes easier to control the amount of carbon by the PECVD to create much more two‐phase interface for Pt deposition. The carbon layer promotes the electronic conductivity of ATO and provides more deposition sites for platinum nanoparticles, which directly influence the size of Pt nanoparticles as well as the electrochemical active surface areas. The as‐prepared catalyst exhibits excellent activity for methanol oxidation reaction (MOR), which is twice of that of the commercial Pt/C catalyst. Meanwhile, it has better stability than the commercial Pt/C.

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Insights into the stability of Pt nanoparticles supported on antimony-doped tin oxide in different potential ranges

Cited by 44 publications

References 59 publications

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

On the Influence of Composition and Structure of Carbon-Supported Pt-SnO2 Hetero-Clusters onto Their Electrocatalytic Activity and Durability in PEMFC

Pt Supported on Carbon‐coating Antimony Tin Oxide as Anode Catalyst for Direct Methanol Fuel Cell

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