The effect of methanol on the stability of Pt/C and Pt–RuO /C catalysts

Rufino, Élen Cristina Gonçalves; Olivi, Paulo

doi:10.1016/j.ijhydene.2010.09.020

Cited by 15 publications

(14 citation statements)

References 48 publications

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“…In agreement with the CVs in Fig. 6a, no methanol oxidation occurred below 0.3 V, and only a straight line was observed in the EIS spectra at 0.3 V. This behavior is common for Pt-catalyzed methanol oxidation and indicates that methanol is dehydrogenated to form the adsorbed CO species that is then oxidatively removed [36,37]. For higher potentials (from 0.4 to 0.6 V), R ct reduced with increasing overpotential, indicating a faster charge transfer for the MOR at a high frequency region.…”

Section: Electrochemical Performancesupporting

confidence: 85%

Facile synthesis of flower-like platinum nanostructures as an efficient electrocatalyst for methanol electro-oxidation

Zhang

Chen

Jiang

et al. 2016

Journal of Colloid and Interface Science

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Section: Electrochemical Performancesupporting

confidence: 85%

Facile synthesis of flower-like platinum nanostructures as an efficient electrocatalyst for methanol electro-oxidation

Zhang

Chen

Jiang

et al. 2016

Journal of Colloid and Interface Science

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“…In agreement with the CV data, no methanol oxidation occurred below 0.3 V, so only straight lines were observed in the EIS spectra below 0.3 V. At 0.30-0.4 V, a "pseudoinductive" behavior was observed, in which a positive loop at higher frequencies was accompanied by a low frequency loop in the fourth quadrant. This is a common behavior for Pt-catalyzed methanol oxidation, and is an indication that methanol is first dehydrogenated to form adsorbed CO species which is then oxidatively removed 28,29 . At 0.5-0.7 V the shapes of the Nyquist plots changes dramatically; the plots are located in the second and third quadrants; in the literature, this is considered as a sign that the rate-determining step of methanol oxidation changes from methanol dehydrogenation to oxidative removal of CO ads by OH ads .…”

Section: Resultsmentioning

confidence: 97%

Ni2P enhances the activity and durability of the Pt anode catalyst in direct methanol fuel cells

Chang

Feng

Liu

et al. 2014

Energy Environ. Sci.

239

119

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“…10% Pt/C and NiCrFe (2 : 2 : 1) catalysts were prepared in ways similar to those reported before. 22,23 Hydrolysis All materials used were dried in an oven at 393 K overnight before hydrolysis. Specified amounts of the materials for hydrolysis, distilled water and acid solution were added to a 5 ml high pressure reactor made by Inconel-625 and sealed.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Formation of C–C bonds for the production of bio-alkanes under mild conditions

et al. 2014

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It is of crucial importance to form C-C bonds between biomass-derived compounds for the production of bio-alkanes from biomass. In this study, it was found that C-C bonds can be formed between angelica lactones, key intermediates derived from biomass, through free radical reactions under mild conditions without using a noble catalyst or solvent, which gave elongated carbon chains of di/trimers with 10 or 15 carbons, with complete conversion and 100% selectivity. The di/trimers produced serve as a novel feedstock for the carbon backbones of bio-alkanes. Hydrogenation of the di/trimers produced C6-C13 hydrocarbons suitable for use as transportation fuels.Biomass is regarded as a possible renewable resource for fuels and chemicals. Current approaches for the conversion of biomass feedstocks into liquid fuels involve their gasification to syngas followed by Fischer-Tropsch synthesis, thermal liquefaction and fermentation. 1 These approaches have one or more drawbacks, including the poor fuel properties of the products, low conversion efficiencies, low heating values, long treatment times or high processing costs. Recently, acid hydrolysis to give sugars followed by aqueous-phase processing (APP) to yield liquid fuel has attracted much interest. 2-7 The APP process can convert biomass-derived sugars into liquid fuels with an energy recovery as high as 96% and is believed to be a promising route for industry-scale technology. 8 However, the process needs sugars as the raw materials and the production of sugars is costly, and sugars tend to produce dehydration products like hydroxylmethylfurfural or humins in the presence of water and an acid catalyst, thus decreasing the yield of the target products. [9][10][11] Furthermore, typical gasoline and diesel fuels are hydrocarbons 6 to 13 carbons in length, while the major monomeric building blocks of biomass are carbohydrates which have 5 or 6 carbons. In order to meet the required fuel specifications, new C-C bonds have to be constructed between sugar-, cellulose-or hemicellulose-derived furan compounds. Ketonization and aldol condensation have been found to be effective for the purpose. However, ketonization has to be carried out at 623 K and 5.7 MPa with Pd or Pt as the catalysts, 12 while aldol condensation needs a ketone as a reactant and low yields have always existed in this reaction. 3,13 In this respect, it is desirable to develop an efficient process that can convert widespread biomass without extensive pretreatment to liquid alkanes, similar to those that have been used for many years from petroleum resources, 14-16 and to design an effective C-C bond formation reaction between biomass-derived compounds under mild conditions. Herein, we introduce an integrated process that converts commonly available biomass into gasoline range alkanes. 17 The strategies of this process are to form elongated-carbon-chain oxygenated intermediates from functional chemicals produced from biomass, and then to remove the oxygens of the intermediates by hydrodeoxygenation to produce ga...

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The effect of methanol on the stability of Pt/C and Pt–RuO /C catalysts

Cited by 15 publications

References 48 publications

Facile synthesis of flower-like platinum nanostructures as an efficient electrocatalyst for methanol electro-oxidation

Facile synthesis of flower-like platinum nanostructures as an efficient electrocatalyst for methanol electro-oxidation

Ni2P enhances the activity and durability of the Pt anode catalyst in direct methanol fuel cells

Formation of C–C bonds for the production of bio-alkanes under mild conditions

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