Preparation and characterizations of platinum electrocatalysts supported on thermally treated CeO2–C composite support for polymer electrolyte membrane fuel cells

Wu, Mei; Han, Mingjia; Li, Muwu; Li, Yuexia; Zeng, Jianhuang; Liao, Shijun

doi:10.1016/j.electacta.2014.07.029

Cited by 26 publications

(16 citation statements)

References 45 publications

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“…In order to overcome the problems associated with carbon supports, alternative materials such as metal oxides [11,[23][24][25][26], conducting polymers [27], non-conducting polymers [28,29], metal nitrides and metal carbides [30,31], ZrO 2 /C [32,33], CeO 2 /C [34] have been explored as catalyst supports for PEM fuel cell application with limited success in terms of achieving desired power density requirements necessary for automotive applications. Hence, high surface area carbons and graphitic carbons are being used as the catalyst support for PEM fuel cell applications.…”

Section: Introductionmentioning

confidence: 99%

Development of catalytically active and highly stable catalyst supports for polymer electrolyte membrane fuel cells

Kim

Xie

Jung

et al. 2015

Journal of Power Sources

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Highlights• Development of highly stable and active cathode catalyst supports is reported.• Pt nanoparticles deposited on the stable supports show enhanced catalytic activity.• Potential holding at 1.2V showed enhanced support stability in H 2 -air polarization.• Rated power densities of 0.18-0.23 g Pt kW −1 are achieved with the novel catalysts. Abstract Novel procedures are developed for the synthesis of highly stable carbon composite catalyst supports (CCCS-800 °C and CCCS-1100 °C) and an activated carbon composite catalyst support (A-CCCS). These supports are synthesized through: (i) surface modification with acids and inclusion of oxygen groups, (ii) metal-catalyzed pyrolysis, and (iii) chemical leaching to remove excess metal used to dope the support. The procedure results in increasing carbon graphitization and inclusion of non-metallic active sites on the support surface. Catalytic activity of CCCS indicates an onset potential of 0.86 V for the oxygen reduction reaction (ORR) with well-defined kinetic and mass-transfer regions and ~2.5% H 2 O 2 production in rotating ring disk electrode (RRDE) studies. Support stability studies at 1.2 V constant potential holding for 400 h indicate high stability for the 30% Pt/A-CCCS catalyst with a cell potential loss of 27 mV at 800 mA cm −2 under H 2 -air, 32% mass activity loss, and 30% ECSA loss. Performance evaluation in polymer electrolyte membrane (PEM) fuel cell shows power densities (rated) of 0.18 and 0.23 g Pt kW −1 for the 30% Pt/A-CCCS and 30% Pt/CCCS-800 °C catalysts, respectively. The stabilities of various supports developed in this study are compared with those of a commercial Pt/C catalyst.

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Section: Introductionmentioning

confidence: 99%

Development of catalytically active and highly stable catalyst supports for polymer electrolyte membrane fuel cells

Kim

Xie

Jung

et al. 2015

Journal of Power Sources

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“…Non-noble metal oxides (M-Ox) such as WO3, CeO2, V2O5, Nb2O5, MoOx, ZrO2, TiO2, MgO and MnO2, exhibit suitable surface properties which can efficiently promote the methanol and ethanol electro-oxidation reactions combined with Pt/C [10]. Therefore, a good strategy to improve the catalytic activity of Pt-based catalysts for MOR is to use metal oxides in the catalyst supports, as a hybrid structure (C + M-Ox) [11]. Pure Pt, in fact, is readily poisoned by strongly-adsorbed intermediates, of which CO is consistently considered as one of the main poisoning species at low operating temperature [12].…”

Section: Introductionmentioning

confidence: 99%

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

et al. 2015

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Platinum (Pt) nanoparticles are deposited on a hybrid support (C-MnO2) according to a polyol method. The home-made catalyst, resulted as Pt/C-MnxO1+x, is compared with two different commercial platinum based materials (Pt/C and PtRu/C). The synthesized catalyst is characterized by means of FESEM, XRD, ICP-MS, XPS and μRS analyses. MnO2 is synthesized and deposited over a commercial grade of carbon (Vulcan XC72) by facile reduction of potassium permanganate in acidic solution. Pt nanoparticles are synthesized on the hybrid support by a polyol thermal assisted method (microwave irradiation), followed by an annealing at 600 °C. The obtained catalyst displays a support constituted by a mixture of manganese oxides (Mn2O3 and Mn3O4) with a Pt loading of 19 wt. %. The electro-catalytic activity towards MOR is assessed by RDE in acid conditions (0.5 M H2SO4), evaluating the ability to oxidize methanol in 1 M concentration. The synthesized Pt/C-MnxO1+x catalyst shows good activity as well as good stability compared to the commercial Pt/C based catalyst.

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“…Without carbon support, all Pt nanoparticles could contact sufficiently with CeO 2 support. Herein, the strong peak intensity of CeO 2 may cover up the information of Pt nanoparticles with poor crystal structure [9,17]. The XRD patterns of Pt nanoparticles and commercial Pt/C-JM shown in Fig.…”

Section: Composition and Morphological Characterizationmentioning

confidence: 98%

“…Recently, a series of Pt/metal-oxide/C catalysts with excellent electrocatalytic activity such as Pt/CeO 2 /C [7][8][9][10], Pt/TiO 2 /C [11][12][13], Pt/RuO 2 /C [14] and Pt/SnO 2 /C [15,16] have been synthesized for methanol electrooxidation. Among various metal oxide co-catalysts/support, CeO 2 has received widespread attention for its abundant O-vacancy defects, lower price, better redox (Ce 4+ /Ce 3 + ) property and anti-corrosion ability in acid media [7].…”

Section: Introductionmentioning

confidence: 99%

CeO2 nanorods with high energy surfaces as electrocatalytical supports for methanol electrooxidation

You

Tian

et al. 2015

Electrochimica Acta

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Preparation and characterizations of platinum electrocatalysts supported on thermally treated CeO2–C composite support for polymer electrolyte membrane fuel cells

Cited by 26 publications

References 45 publications

Development of catalytically active and highly stable catalyst supports for polymer electrolyte membrane fuel cells

Development of catalytically active and highly stable catalyst supports for polymer electrolyte membrane fuel cells

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

CeO2 nanorods with high energy surfaces as electrocatalytical supports for methanol electrooxidation

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