Metal oxide promoters for methanol electro-oxidation

Amin, R.S.; El–Khatib, K.M.; Siracusano, Salvatore; Baglio, V.; Stassi, A.; Aricò, A.S.

doi:10.1016/j.ijhydene.2014.04.100

Cited by 29 publications

(24 citation statements)

References 34 publications

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“…There is an analogy between the methanol oxidation and oxygen evolution processes; both require water adsorption and dissociation in oxygen species that, in the present case (methanol oxidation), give rise to surface reaction with adsorbed methanolic residues, producing CO 2 [2]. Similar results have been already reported by our group, where noble metal oxides (e.g., IrO x and RuO x ) and valve metal oxides (e.g., SnO x and VO x ) were added to Pt as promoters for methanol electro-oxidation reaction [46]. Other oxides with a perovskite structure were also found to be good catalysts for oxygen evolution reaction, in particular in alkaline media [47,48].…”

Section: Methanol Tolerance Characteristics Of the Composite Electrodsupporting

confidence: 87%

Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode

et al. 2019

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A non-stoichiometric calcium titanate CaTiO3-δ (CTO) was synthesized and used as oxygen reduction reaction co-catalyst (together with Pt/C) in direct methanol fuel cells (DMFCs). A membrane-electrode assembly (MEA), equipped with a composite cathode formulation (Pt/C:CTO1:1), was investigated in DMFC, using a 2 M methanol solution at the anode and oxygen at the cathode, and compared with an MEA equipped with a benchmark Pt/C cathode catalyst. It appears that the presence of the CTO additive promotes the oxygen reduction reaction (ORR) due to the presence of oxygen vacancies as available active sites for oxygen adsorption in the lattice. The increase in power density obtained with the CTO-based electrode, compared with the benchmark Pt/C, was more than 40% at 90 °C, reaching a maximum power density close to 120 mW cm−2, which is one of the highest values reported in the literature under similar operating conditions.

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Section: Methanol Tolerance Characteristics Of the Composite Electrodsupporting

confidence: 87%

Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode

et al. 2019

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“…Another approach to enhance the electrocatalytic activity of Pt‐based catalysts towards methanol oxidation consists in adding metal oxides, nitrides and carbides to the carbonaceous material (i. e., to form a hybrid support) ,. The incorporation of another oxophilic compound in the substrate cannot only maximize the performance of the electrode but also improves the economic efficiency of DMFCs.…”

Section: Introductionsupporting

confidence: 85%

Manganese (II,III) Oxide‐Activated Carbon Black Supported PtRu Nanoparticles for Methanol Electrooxidation in Acid Medium

et al. 2018

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In this work, PtRu nanoparticles supported on hybrid manganese (II,III)‐carbon composites were prepared by a microwave‐assisted polyol process in ethylene glycol. The obtained PtRu/(100‐x) C.xMn3O4 catalysts were characterized by XRD diffraction, TEM, SEM‐EDX analysis, ICP‐AES and electrochemical techniques. Small and well‐distributed nanoparticles of about 2.6 nm were obtained over the hybrid support. The as‐prepared catalysts presented similar Pt : Ru atomic ratio (ca. 3.4 : 1), indicating that the composition of the bimetallic system is unaffected by the oxide content in the hybrid support. However, the noble metal loading increased with the increase in the oxide content due to the formation of more nucleation sites during microwave heating. The electrochemical experiments showed that the best performance and the lowest poisoning rate are obtained with PtRu/90C.10Mn3O4 followed by PtRu/70C.30Mn3O4. The bimetallic catalyst supported over 90C.10Mn3O4 exhibited a steady current density of 215 mA mgPtRu−1 at 0.5 V, which is 40 % higher than that of PtRu/C. This behavior is mainly associated with the ability of Mn3O4 to provide a large extra amount of hydroxyl groups and promote the dehydrogenation of methanol.

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“…Amin et al investigated various metal oxides, including IrO 2 , as promoters for methanol oxidation with Pt. 283 They observed a mass activity order of Pt−IrO x > Pt−RuO x > Pt−SnO x > Pt− VO x . Higher coverage of OH species on the surface of IrO 2 and high mobility were related to enhanced activity for methanol oxidation.…”

Section: Effect Of Iromentioning

confidence: 99%

Anode Catalysts for Direct Methanol Fuel Cells in Acidic Media: Do We Have Any Alternative for Pt or Pt–Ru?

et al. 2014

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Metal oxide promoters for methanol electro-oxidation

Cited by 29 publications

References 34 publications

Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode

Performance Improvement in Direct Methanol Fuel Cells by Using CaTiO3-δ Additive at the Cathode

Manganese (II,III) Oxide‐Activated Carbon Black Supported PtRu Nanoparticles for Methanol Electrooxidation in Acid Medium

Anode Catalysts for Direct Methanol Fuel Cells in Acidic Media: Do We Have Any Alternative for Pt or Pt–Ru?

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