Platinum Supported on Silicon Carbide as Fuel Cell Electrocatalyst

Honji, A.; Mori, Takanobu; Hishinuma, Yukio; Kurita, K.

doi:10.1149/1.2095831

Cited by 20 publications

(13 citation statements)

References 4 publications

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“…In the quest for stable electrocatalyst supports for phosphoric acid fuel cells, Honji et al tested silicon carbide (SiC) as early as 1988 16 . The reasoning behind this was the good chemical stability of SiC in hot phosphoric acid.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Stability and Postmortem Studies of Pt/SiC Catalysts for Polymer Electrolyte Membrane Fuel Cells

Stamatin

Spéder

Dhiman

et al. 2015

ACS Appl. Mater. Interfaces

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In the presented work, the electrochemical stability of platinized silicon carbide is studied. Postmortem transmission electron microscopy and X-ray photoelectron spectroscopy were used to document the change in the morphology and structure upon potential cycling of Pt/SiC catalysts. Two different potential cycle aging tests were used in order to accelerate the support corrosion, simulating start-up/shutdown and load cycling. On the basis of the results, we draw two main conclusions. First, platinized silicon carbide exhibits improved electrochemical stability over platinized active carbons. Second, silicon carbide undergoes at least mild oxidation if not even silicon leaching.

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Section: Introductionmentioning

confidence: 99%

“…This early study 16 lead to the use of nano-SiC as an electrocatalyst support for PEMFCs 17 . Lv et al showed using post-mortem electron microscopy that Pt/SiC/C has an improved electrochemical stability over Pt/C at potentials up to 1.2 V RHE 18 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Stability and Postmortem Studies of Pt/SiC Catalysts for Polymer Electrolyte Membrane Fuel Cells

Stamatin

Spéder

Dhiman

et al. 2015

ACS Appl. Mater. Interfaces

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“…This fundamental aspect was pioneered by a Japanese team who first commented on the need for using an acid resistant support for noble metal nanoparticles in place of the classical carbon black. 547 Indeed, the progressive corrosion of carbon supports in strong acid environments was claimed as the main reason for the electrocatalyst activity loss in the first fuel cell and semicell prototypes. Carbon corrosion caused the aggregation of the noble metal NPs with the subsequent irreversible decrease of their electrochemical surface area (ECSA).…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…The addition of carbon to a SiC-supported catalyst was conventionally used to compensate the relatively low or non-electrical conductivity of the supports. 547,548 Cyclic voltammetry accelerated durability tests (ADTs) conducted in 0.5 M H 2 SO 4 as an electrolyte and combined with highresolution electron microscopy (HRTEM) studies have unambiguously showed the improved stability of the carbonmixed Pt/SiC electrocatalysts (Pt/SiC/C) compared to the Pt/C counterpart in the face of a similar electrochemical performance of the two systems in comparison. After cycling the catalysts for 4000 runs, only 8.9% of the initial ECSA remained for Pt/C, whereas that on Pt/SiC/C was up to 22.5% of its pristine value.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…Attempts to employ silicon carbide networks in fuel cell devices have answered to the need for developing stable catalyst supports suitable to operate under chemical and electrochemical hostile and oxidant environments as to enhance the catalyst stability, its performance, and lifetime. This fundamental aspect was pioneered by a Japanese team who first commented on the need for using an acid resistant support for noble metal nanoparticles in place of the classical carbon black . Indeed, the progressive corrosion of carbon supports in strong acid environments was claimed as the main reason for the electrocatalyst activity loss in the first fuel cell and semicell prototypes.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

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Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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