Methanol electro-oxidation and direct methanol fuel cell using Pt/Rh and Pt/Ru/Rh alloy catalysts

Choi, Jong‐Ho; Park, Kyung-Won; Park, In-Su; Nam, Woo-Hyun; Sung, Yung‐Eun

doi:10.1016/j.electacta.2004.01.109

Cited by 102 publications

(33 citation statements)

References 16 publications

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“…This is mainly due to the following independent reactions taking place in the system during reduction of metal chlorides with NaH 2 The initial pH value of the solution is about 9. After the solution is heated for 10 min at 95°C, its pH value drops rapidly due to the reduction of PtCl 2À 6 , Ru 3+ and Ni 2+ which produced H + as shown in Eqs.…”

Section: Original Research Papermentioning

confidence: 99%

“…DMFC as a kind of proton exchange membrane fuel cell (PEMFC) has been receiving increasing attention because of its advantages of easy transportation, storage and refill of methanol, reduced system weight, size and complexity, high-energy efficiency and low-temperature operation [2][3][4]. Therefore, DMFC is the most attractive research point in fuel cell area.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

et al. 2010

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This research is aimed to improve the activity and stability of ternary alloy Pt–Ru–Ni/C catalyst. A novel anodic catalyst for direct methanol fuel cell (DMFC), carbon supported Pt–Ru–Ni–P nanoparticles, has been prepared by chemical reduction method by using NaH2PO2 as a reducing agent. One glassy carbon disc working electrode is used to test the catalytic performances of the homemade catalysts by cyclic voltammetric (CV), chronoamperometric (CA) and amperometric i–t measurements in a solution of 0.5 mol L–1 H2SO4 and 0.5 mol L–1 CH3OH. The compositions, particle sizes and morphology of home‐made catalysts are evaluated by means of energy dispersive analysis of X‐ray (EDAX), X‐ray diffraction (XRD) and transmission electron micrographs (TEM), respectively. TEM images show that Pt–Ru–Ni–P nanoparticles have an even size distribution with an average diameter of less than 2 nm. The results of CV, CA and i–t curves indicate that the Pt–Ru–Ni–P/C catalyst shows significantly higher activity and stability for methanol electrooxidation due to the presence of non‐metal phosphorus in comparison to Pt–Ru–Ni/C one. All experimental results indicate that the addition of non‐metallic phosphorus into the Pt–Ru–Ni/C catalyst has definite value of research and practical application for enhancing the performance of DMFC.

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Section: Original Research Papermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

et al. 2010

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“…Platinum-based metal additives can be used as threeway catalysts (TWC), and due to their selective catalytic properties, they are the most active components in hydrocarbon oxidation and are active in methanol fuel cell electro-oxidation reactions, as reported elsewhere (Anderson, 1993;Choi et al, 2004). The use of rhodium-based metal improves the nitrogen oxide conversion properties of the catalysts, including selectivity towards dinitrogen and reduces poisoning by carbon monoxide (Stoyanovskii et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Removal of Gaseous Ammonia in Pt-Rh Binary Catalytic Oxidation

Dong

Lai

Lin

2012

Aerosol Air Qual. Res.

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In this study, the oxidation of ammonia (NH 3 ) to form nitrogen was investigated by selective catalytic oxidation (SCO) over a Pt-Rh binary catalyst fabricated by the incipient wetness impregnation process in a tubular fixed-bed flow quartz reactor (TFBR). The catalysts were analysed by three-dimensional excitation-emission fluorescent matrix (EEFM) spectroscopy, UV-Vis absorption, dynamic light-scattering (DLS), zeta potential measurements, and linear sweep voltammograms (LSV). At optimum conditions, namely, a temperature of 673 K and an oxygen content of 4%, nearly 100% of the NH 3 was removed by catalytic oxidation over the Pt-Rh binary catalyst. The main product of the NH 3 -SCO process was N 2 . Additionally, for the freshly prepared Pt-Rh binary catalyst, three peaks (at 235/295 nm, 245/315 nm, and 240/365 nm) were observed via EEFM; however, the peak with the highest emission wavelength disappeared over time as Pt-Rh binary catalyst was exhausted by NH 3 . These results show that EEFM spectroscopy, which enhances intrinsic emission Pt clusters in the Pt-Rh binary catalyst, is an effective method for characterizing this catalyst in catalytic treatment systems. The UV-Vis absorption spectra revealed that the bands associated with such octahedral platinum (IV) species were observed at about 350 nm. Moreover, the LSV reversible redox ability may explain the significant activity of the catalysts.

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“…Therefore, various Pt-based binary and ternary catalysts such as Pt-Ru, Pt-Sn, Pt-Mo, Pt-Ru-Mo have been intensively investigated to eliminate the poisoning effect [9][10][11]. Moreover, all the time considerable efforts are taken to develop novel binary and ternary catalysts with enhanced catalytic activities for methanol oxidation [12,13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electrocatalytic Properties of Pt/Mo - Expanded Graphite Composite Derived from Graphite Intercalation Compound

Urbaniak

Skowroński

2010

Acta Phys. Pol. A

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In the present work, electrocatalytic properties of Pt-EG and Pt/Mo-EG composite electrodes are studied. These composites were prepared by a three-step synthesis. First, stage-1 HClO4-GIC was synthesized using the chronopotentiometric method. Then, HClO4-GIC was heat treated to obtain expanded graphite. Finally, expanded graphite was coated with platinum catalyst from a water-alcohol solution of H2PtCl6. MoCl5-GIC synthesized in parallel was subjected to thermal exfoliation to get Mo-EG composite onto which platinum catalyst was dispersed. The X-ray diffraction and energy dispersive X-ray analyses coupled with scanning electron microscopy were applied for characterizing the obtained GICs and EG-based composites, whereas cyclic voltammetry was used to study electrocatalytic properties of Pt/EG and Pt/Mo-EG composite electrodes in sulfuric acid and sulfuric acid admixed with methanol.

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Methanol electro-oxidation and direct methanol fuel cell using Pt/Rh and Pt/Ru/Rh alloy catalysts

Cited by 102 publications

References 16 publications

Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

Removal of Gaseous Ammonia in Pt-Rh Binary Catalytic Oxidation

Investigation of Electrocatalytic Properties of Pt/Mo - Expanded Graphite Composite Derived from Graphite Intercalation Compound

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