Carbon-free Pt Electrocatalysts Supported on Doped SnO<sub>2</sub> for Polymer Electolyte Fuel Cells

Takasaki, Fumiaki; Noda, Zhiun; Masao, A.; Shiratori, Yusuke; Ito, Kohei; Sasaki, Kazunari

doi:10.1149/1.3210636

Cited by 13 publications

(20 citation statements)

References 8 publications

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“…However, the main problem of doped metal oxides is their low Brunauer–Emmett–Teller (BET) surface areas and their low electronic conductivities compared to the CB support. Nevertheless, Sb-doped SnO 2 [20,21,22,23], Nb-doped SnO 2 [24], Nb-doped TiO 2 [25,26], and In-doped TiO 2 [27] are suggested as catalyst supports for PEMFC application. Catalyst supported on carbon-doped TiO 2 also showed improved stability compared to catalysts supported on CB reported by Huang et al [28] and Liu et al [29].…”

Section: Introductionmentioning

confidence: 99%

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

2018

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Stability of cathode catalyst support material is one of the big challenges of polymer electrolyte membrane fuel cells (PEMFC) for long term applications. Traditional carbon black (CB) supports are not stable enough to prevent oxidation to CO2 under fuel cell operating conditions. The feasibility of a graphitized carbon (GC) as a cathode catalyst support for low temperature PEMFC is investigated herein. GC and CB supported Pt electrocatalysts were prepared via an already developed polyol process. The physical characterization of the prepared catalysts was performed using transmission electron microscope (TEM), X-ray Powder Diffraction (XRD) and inductively coupled plasma optical emission spectrometry (ICP-OES) analysis, and their electrochemical characterizations were conducted via cyclic voltammetry(CV), rotating disk electrode (RDE) and potential cycling, and eventually, the catalysts were processed using membrane electrode assemblies (MEA) for single cell performance tests. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SEM) have been used as MEA diagonostic tools. GC showed superior stability over CB in acid electrolyte under potential conditions. Single cell MEA performance of the GC-supported catalyst is comparable with the CB-supported catalyst. A correlation of MEA performance of the supported catalysts of different Brunauer–Emmett–Teller (BET) surface areas with the ionomer content was also established. GC was identified as a promising candidate for catalyst support in terms of both of the stability and the performance of fuel cell.

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Section: Introductionmentioning

confidence: 99%

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

2018

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“…Normally, the Fe, Co, Ni‐based supports are suggested to be used in alkaline media, while the Mo, W, Sn‐based supports could withstand both strongly acidic and alkaline media. The thermochemical stability of metal oxides was studied by Sasaki et al . (see Figure ), which provides a reference for visual screening of supports in the selective use of electrocatalysis (red compounds are stable).…”

Section: Self‐supported/non‐precious Metal Materialsmentioning

confidence: 99%

“… Thermochemically stable metal oxides are marked in red in the periodic table, which was determined by performing theoretical calculations under the molarity [10 −6 mol/kg‐H 2 O, pH=0, cathode Eh=1.0 V vs. SHE. Sasaki et al . compiled this figure.…”

Section: Self‐supported/non‐precious Metal Materialsmentioning

confidence: 99%

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Huang

Babu

et al. 2018

ChemCatChem

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Polymer electrolyte fuel cells (PEFCs) are among the most advanced energy technologies with low operating temperatures, high energy densities, ease of transportation and storage. However, the deficiencies such as low activity and high cost of the electrocatalysts at anodes greatly hinder their commercialization. The commonly used carbon black supports lack the capacity of regulation over the supported noble metals towards efficient electro‐catalytic oxidation of fuels. In this Mini‐Review, the prerequisite factors in advanced supports are outlined, ranging from self‐supported precious metal alloys as well as non‐noble metal materials, while simultaneously revealing the superiorities of some advanced supports beyond carbon black in terms of electronic conductivity, synergy with surface precious metals, chemical and electrochemical stability, and other possible interactions. The effects arisen from microscopic morphology, nano‐structure, and composition on the electrocatalytic activity/stability are also discussed. Finally, several of the most promising supports are highlighted, and the research trends of synergistic supports in future PEFCs are predicted.

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“…For example, SnO 2 [4][5][6][7][8][9], Nb-doped SnO 2 [6][7][8], Sb-doped SnO 2 [6,8,10], TiO 2 [11], and ITO (Indium-Tin oxides) [12] have been proposed as electrically conductive support materials with high corrosion-resistance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of Polymer Electrolyte Fuel Cells Using Carbon-Free SnO₂-Supported Pt Electrocatalysts

et al. 2011

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Carbon-free Pt Electrocatalysts Supported on Doped SnO₂ for Polymer Electolyte Fuel Cells

Cited by 13 publications

References 8 publications

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Electrochemical Performance of Polymer Electrolyte Fuel Cells Using Carbon-Free SnO₂-Supported Pt Electrocatalysts

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Carbon-free Pt Electrocatalysts Supported on Doped SnO2 for Polymer Electolyte Fuel Cells

Cited by 13 publications

References 8 publications

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Electrochemical Performance of Polymer Electrolyte Fuel Cells Using Carbon-Free SnO2-Supported Pt Electrocatalysts

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Carbon-free Pt Electrocatalysts Supported on Doped SnO₂ for Polymer Electolyte Fuel Cells

Electrochemical Performance of Polymer Electrolyte Fuel Cells Using Carbon-Free SnO₂-Supported Pt Electrocatalysts