Optimisation of the ethylene glycol reduction method for the synthesis of platinum-ceria-carbon materials as catalysts for the methanol oxidation reaction

Nguyen, Huy Quí Vinh; Nerut, Jaak; Kasuk, Heili; Härmas, Meelis; Valk, Peeter; Romann, Tavo; Koppel, Miriam; Teppor, Patrick; Aruväli, Jaan; Korjus, Ove; Volobujeva, Olga; Lust, Enn

doi:10.1007/s10008-022-05326-4

Cited by 4 publications

(8 citation statements)

References 45 publications

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“…The CeO 2 crystallite size, d CeO 2 , XRD , were varied depending on the synthesis method, TABLE III. In comparison with our previous studies (5), both Pt and CeO 2 crystallite sizes are smaller. This indicated the synthesis method has been improved significantly.…”

Section: Physical Characterizationscontrasting

confidence: 86%

“…The MOR activity of materials studied in CV and CA agreed well with each other, In comparison, all catalysts synthesized in this study had MOR activity higher than the commercial PtC(Vulcan). The MOR activity is much higher than that of our previous studies (5). In comparison with other authors with the same type of catalysts, our catalysts have moderate to high MOR activity and well Pt dispersion (2,4).…”

Section: Methanol Oxidationcontrasting

confidence: 62%

“…Cerium(IV) oxide (called ceria) has gained a lot of interest from researchers due to its high oxygen storage capacity and high tolerance toward CO-like intermediates in methanol oxidation reaction (MOR) (1)(2)(3)(4). In our previous study (5), the ceria crystals were synthesized by the modified solvothermal synthesis using urea (6). That synthesis method obtained 30-µm grain-size of ceria crystals, even if the ceria crystallite size was only 11 nm.…”

Section: Introductionmentioning

confidence: 99%

“…The parameters influencing the deposition of Pt nanoparticles (NPs) on the ceria-carbon support by the ethylene glycol (EG) reduction method were investigated in previous study (5). It was found that the influence of energy supply methods such as microwave, ultrasound and boiling on the reaction system needs to be simplified to control the nucleation and growth of Pt NPs.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Nguyen¹,

Nerut²,

Kasuk³

et al. 2023

ECS Trans.

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In this study, 0.7 nm CeO2 crystallites were synthesized by a sonochemical method to prepare a highly active PtCe catalyst material for methanol oxidation and oxygen reduction reaction. The obtained materials contained Pt nanoparticles with a crystallite size of 1 nm and were well dispersed on the surface of carbon material. This is confirmed by ECSA as high as 89 mPt 2 gPt −1. The PtCe materials synthesized on Ketjenblack carbon with small CeO2 were more favorable with methanol oxidation (MOR) in the mixture of 0.5 mol dm−3 H2SO4 and 1 mol dm−3 CH3OH. The MOR mass activity was as high as 200 A gPt −1 after 1-hour chronoamperometry measurement at 0.85 V vs RHE. The PtCe synthesized on chromium carbide-derived carbon material was more favorable to oxygen reduction (ORR) in 0.1 mol dm−3 HClO4 saturated oxygen. The ORR mass activity at 0.9 V vs RHE was 304 A gPt −1. The Pt deposition method was optimized and repeatable.

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Section: Physical Characterizationscontrasting

confidence: 86%

Section: Methanol Oxidationcontrasting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Nguyen¹,

Nerut²,

Kasuk³

et al. 2023

ECS Trans.

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“…Amongst choices for a secondary metal or metal oxide, cerium (IV) oxide (ceria) has gained a lot of interest due to its high oxygen storage capacity and high tolerance toward CO-like intermediates of MOR. [21][22][23][24] In our previous study, 25 ceria particles were synthesized by the modified solvothermal synthesis method using urea. 26 That synthesis method generated 30 μm grain-size flower-shaped ceria crystals, even if the ceria crystallite size was only 11 nm.…”

mentioning

confidence: 99%

Influence of Chromium Carbide-Derived Carbon Support and Ceria Nanocrystals on Pt–CeO₂/C Catalysts for Fuel Cell Applications

Quí Vinh Nguyen,

Nerut,

Kasuk

et al. 2024

ECS Adv.

Self Cite

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The influence of different synthesis parameters on CeO2 and Pt nanoparticle (NP) deposition on Ketjenblack carbon (C(KB)) was examined. The Pt NP diameter (3.1–4.1 nm) was not influenced by CeO2 synthesis parameters. The CeO2 NPs synthesized using ultrasound sonication contribute to a better durability of the Pt-CeO2/C against CO poisoning. In contrast, CeO2 synthesized using the microwave heating method contributes to better methanol oxidation reaction (MOR) activity at low potential. Synthesis parameters of CeO2 and Pt NPs developed for the C(KB)-based catalysts were applied for C(Cr3C2)-based catalysts. The Pt NP diameter of C(Cr3C2)-based catalysts was slightly higher (7.2 nm) as some Pt NPs were agglomerated. The C(Cr3C2) support facilitates the MOR and CO stripping, especially in the case of the Pt/C on C(Cr3C2) support. The MOR activity at 0.85 V of Pt/C on the C(Cr3C2) support is as good as the MOR activity for the best Pt-CeO2/C on the C(KB) support. The C(Cr3C2) support also improves the CO removal from the Pt surface. All the synthesized catalysts had better MOR activity than the commercial Pt/C(Vulcan) catalyst. The oxygen reduction reaction activity of Pt-CeO2/C catalysts with higher CeO2 content synthesized with the microwave heating method was very good.

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Teaching electrochemistry and student participation in the development of sustainable electricity generation/storage devices at the Institute of Chemistry of the University of Tartu

Ers,

Pikma,

Palm

et al. 2023

J Solid State Electrochem

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Research-based education is a long-standing tradition at the University of Tartu (UT). Basic knowledge of electrochemistry and the principles of developing electrochemical devices have been taught and implemented at UT since 1960. For instance, during then, self-made alkaline electrolysers were used to generate hydrogen. The hydrogen was further purified and used to saturate aqueous and non-aqueous electrolytes. The fundamental electrochemical research has formed a solid background on which the development of supercapacitors and Na+-ion or Li+-ion batteries is based today. Since 1991, the Ph.D., MSc and undergraduate students have investigated the properties of high surface–area carbon materials in non-aqueous electrolytes to develop energy conversion and storage devices with high energy and power density. Moreover, porous thin-film complex metal hydride–based hydrogen storage devices are also under study. The research of solid oxide fuel cells (SOFC) and polymer electrolyte membrane fuel cells (PEMFC) began at the UT in 2001 and 2010, respectively. Based on the collected knowledge, a sustainable green electricity and hydrogen generation-storage complex (GEHGSC) was constructed, consisting of solar cells and fuel cells for electricity generation, batteries for storage and electrolysers for hydrogen generation. The main aim of GEHGSC is to educate students, young scientists and local authorities specialized in sustainable energy technologies and applied electrochemistry. Electrolyzed hydrogen has been used for experimental testing of SOFC and PEMFC, produced at the Institute of Chemistry. The 300 bar hydrogen compressor has been installed, and thereafter, the PEMFC-powered self-driving car Iseauto, completed by contract for Auve Tech OÜ, has been fuelled with hydrogen produced by GEHGSC.

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Optimisation of the ethylene glycol reduction method for the synthesis of platinum-ceria-carbon materials as catalysts for the methanol oxidation reaction

Cited by 4 publications

References 45 publications

Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Influence of Chromium Carbide-Derived Carbon Support and Ceria Nanocrystals on Pt–CeO₂/C Catalysts for Fuel Cell Applications

Teaching electrochemistry and student participation in the development of sustainable electricity generation/storage devices at the Institute of Chemistry of the University of Tartu

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Optimisation of the ethylene glycol reduction method for the synthesis of platinum-ceria-carbon materials as catalysts for the methanol oxidation reaction

Cited by 4 publications

References 45 publications

Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Ultra-Small Ceria Nanocrystals at Carbon Surface Synthesized by Ultrasound Sonication: A Study of Highly Active Platinum-Cerium Bifunctional Catalysts for Methanol Oxidation and Oxygen Reduction

Influence of Chromium Carbide-Derived Carbon Support and Ceria Nanocrystals on Pt–CeO2/C Catalysts for Fuel Cell Applications

Teaching electrochemistry and student participation in the development of sustainable electricity generation/storage devices at the Institute of Chemistry of the University of Tartu

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Influence of Chromium Carbide-Derived Carbon Support and Ceria Nanocrystals on Pt–CeO₂/C Catalysts for Fuel Cell Applications