High surface electrochemical support based on Sb-doped SnO2

Gurrola, M.P.; Guerra‒Balcázar, Minerva; Álvarez‐Contreras, Lorena; Nava, R.; Ledesma‐García, J.; Arriaga, L.G.

doi:10.1016/j.jpowsour.2013.06.078

Cited by 22 publications

(23 citation statements)

References 22 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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“…, its electrical conductivity increases to 10 2 or 10 3 X -1 cm -1 [13][14][15]. Several studies indicate that the ATO could be used as a catalyst support for OER and ORR in a water electrolyzer (WE) and FCs, with a reported improvement in the stability of the support compared with an undoped oxide under the conditions of oxygen evolution [12,13,[16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of a Sb-doped SnO2 support synthesized by coprecipitation for oxygen reactions

et al. 2015

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Highly dispersed platinum or platinum-based catalysts on a conductive support are commonly used as electrode materials in low-temperature fuel cells. Similarly, iridium oxide is the usual anode material in polymeric exchange membrane electrolyzers. The performance and, in particular, the stability of these catalysts strongly depends on the characteristics of the support. This study presents the results of the physicochemical and electrochemical characterization of the powers of antimony-doped tin oxide (ATO) synthesized by a chemical coprecipitation method and a minimum calcination time. These supports were used as catalytic supports for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The ATO was characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy, energy dispersive spectrometry and four probe resistivity techniques. The electrochemical properties were obtained by cyclic voltammetry (CV), linear voltammetry (LV) and rotating disk electrode (RDE). The material obtained showed nanometric sizes of 4-9 nm, and the electrochemical results indicate that the synthesized ATO nanoparticles can be used as a support for IrO 2 and Pt in electrodes for PEM electrolyzers and fuel cells. Some mixtures of synthesized ATO and Vulcan carbon (VC) were assayed as mixed supports for ORR and OER and for acquiring a protective effect of ATO on the degradation of the carbon support.

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“…[21][22][23] Most of the dopant elements added to the SnO 2 matrix are known to inhibit particle growth and modify the material morphology. 21,24 Nb- [25][26][27][28] or Sb- 25,26,[29][30][31][32][33][34][35][36][37] doped SnO 2 materials have already been tested as catalyst support. Pt/SnO 2 -based electrocatalysts have demonstrated high mass activity for the ORR, sometimes surpassing that of Pt/C electrocatalysts.…”

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confidence: 99%

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Ozouf

Cognard

Maillard

et al. 2018

J. Electrochem. Soc.

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Tin dioxide is a promising catalyst support to improve the stability of proton-exchange membrane fuel cells (PEMFC) cathodes at high voltages. However, optimizing the catalytic activity for the oxygen reduction reaction (ORR) of tin dioxide based electrocatalyst still remains challenging. In this study, an antimony doped tin dioxide (ATO) aerogel featuring suitable physico-chemical properties for application at a PEMFC cathode was successfully synthetized. Two platinum nanoparticles deposition methods were tested and compared. One is a chemical reduction route (using ethylene glycol, EG), the other uses ultraviolet (UV) irradiation followed by different thermal post-treatments. Electrocatalysts structure and morphology were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments. The highest ORR mass activity measured in liquid electrolyte at 25 • C was obtained for Pt/ATO from EG method (32 A g Pt −1 versus 27 A g Pt −1 for a reference Pt/HSAC 40 wt%). Pt/ATO turned out to be more stable than Pt/HSAC during an accelerated stress test composed of 5,000 potential cycles between 1.0 and 1.5 V vs. RHE at 80 • C.

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High surface electrochemical support based on Sb-doped SnO2

Cited by 22 publications

References 22 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

Electrochemical performance of a Sb-doped SnO2 support synthesized by coprecipitation for oxygen reactions

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

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High surface electrochemical support based on Sb-doped SnO2

Cited by 22 publications

References 22 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

Electrochemical performance of a Sb-doped SnO2 support synthesized by coprecipitation for oxygen reactions

Sb-Doped SnO2Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

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Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability