Enhanced activity for ethanol electrooxidation on Pt–MgO/C catalysts

Xu, Chen; Shen, Pei Kang; Ji, Xinhe; Zeng, Rong; Liu, Yingliang

doi:10.1016/j.elecom.2005.09.015

Cited by 130 publications

(67 citation statements)

References 29 publications

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“…A major benefit, the carbonation problem of alkaline DMFC can be greatly reduced using alkaline solid polymer membranes instead of an alkaline solution [12][13][14][15]. In addition, as we know, the anodic electro-oxidation of methanols in alkaline media shows much faster kinetics than that in acidic media [7]. Yang et.…”

Section: Introductionmentioning

confidence: 97%

“…At present, alkaline DMFCs are being actively studied and a lot of progress has been made during the past few years [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. However, the development of the DMFC has been hampered due to several major problems, which are slow methanol oxidation kinetics and incomplete electro-oxidation of methanol, the poisoning of adsorbed intermediate species on the Pt surface, the high methanol crossover through the solid-state polymer Nafion (Du Pont) membrane, and the high costs of the Nafion polymer membrane and Pt catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Yang

2012

J Appl Electrochem

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The anion-exchange composite polymer membrane based on quaterized poly(vinyl alcohol)/poly(epichlorohydrin) (designated as Q-PVA/PECH) was prepared by a solution casting method and a quaternization process. The characteristic properties of the Q-PVA/PECH anionexchange composite polymer membranes were investigated by scanning electron microscopy, thermal gravimetric analysis, micro-Raman spectroscopy, and AC impedance method. Alkaline direct methanol fuel cells (ADMFC) comprised Q-PVA/PECH anion-exchange composite polymer membranes were assembled and examined. Experimental results indicate that an alkaline DMFC employing an inexpensive non-perfluorinated Q-PVA/PECH composite polymer membrane shows excellent electrochemical performances. The peak power densities of the DMFC using 4 M KOH ? 1 M CH 3 OH, 2 M CH 3 OH, and 4 M CH 3 OH fuels are 17. 22, 22.30, and 20.81 mW cm -2 , respectively, under ambient conditions. The Q-PVA/PECH composite polymer membrane appears as a viable candidate for use in an ADMFC.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Yang

2012

J Appl Electrochem

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“…Metal oxide-supported Pt electrocatalysts such as Pt/SnO x [51], Pt-MgO/C [52], Pt-CeO 2 /C [53,54], Pt-ZrO 2 /C [55], CNT/SnO 2 /Pt thin films [56], Pt-Mo/CNT@TiO 2 [57], and Pt-ATO (platinum-antimony tin oxide)/MWCNT [58] have been shown to improve electrocatalytic activity and stability for ethanol electrooxidation compared to pure Pt or Pt/C electrocatalysts. NiO is a very attractive material for various applications such as Li-ion battery anode [59], supercapacitors [14,60], and fuel cell electrodes [61,62].…”

Section: Fuel Cellsmentioning

confidence: 99%

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Razeeb

Hasan

Jamal

et al. 2015

Handbook of Nanoelectrochemistry

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In order to move away from the carbon-based energy technologies, electrochemical energy production and storage is under serious consideration as an alternative energy/power source. The future success of this global effort is under review, and researchers are looking forward to designing more sustainable and environmentally friendly electrochemical energy storage and conversion (EESC) systems. Electrochemical energy storage and conversion systems in the broadest sense have three variants: batteries, fuel cells, and electrochemical capacitors, also known as supercapacitors. The energy storage and conversion mechanisms in these three systems are different, but the energy -providing processes in these systems -all follow solid state and surface interface chemistry, taking place in active electrode materials and at the phase boundary of the electrode/electrolyte interface. Also, all three systems consist of two electrodes which are in contact with the electrolyte but separated by a membrane. Conventional materials used in these systems cannot meet the ever-increasing demand for energy. Thereby, designing efficient and miniaturized EESC devices that achieve high energy storage or delivery at high charge and discharge rates and with lifetimes capable of matching the specific requirements of applications is one of the major challenges facing today's research community.Thereby, this chapter will review some of the recent developments (2010)(2011)(2012)

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“…CO-like poisoning species on Pt can be transformed to CO 2 at lower potential as a result of the formation of oxygen-containing species. The addition of ZrO 2 and MgO to Pt has also shown to improve ethanol oxidation performance [84,85]. Also, Ni-supported Pt-Ru electrocatalysts have been investigated and it was found that an optimal Ru content was in the range of 30-50 at% [86].…”

Section: Alkaline Mediamentioning

confidence: 99%

Nanostructured electrocatalyst for fuel cells : silica templated synthesis of Pt/C composites.

Stechel¹,

Switzer²,

Fujimoto³

et al. 2007

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Platinum-based electrocatalysts are currently required for state-of-the-art fuel cells and represent a significant portion of the overall fuel cell cost. If fuel cell technology is to become competitive with other energy conversion technologies, improve the utilization of precious metal catalysts is essential. A primary focus of this work is on creating enhanced nanostructured materials which improve precious-metal utilization. The goal is to engineer superior electrocatalytic materials through the synthesis, development and investigation of novel templated open frame structures synthesized in an aerosol-based approach.Bulk templating methods for both Pt/C and Pt-Ru composites are evaluated in this study and are found to be limited due to the fact that the nanostructure is not maintained throughout the entire sample. Therefore, an accurate examination of structural effects was previously impossible. An aerosol-based templating method of synthesizing nanostructured Pt-Ru electrocatalysts has been developed wherein the effects of structure can be related to electrocatalytic performance. The aerosol-based templating method developed in this work is extremely versatile as it can be conveniently modified to synthesize alternative materials for other systems. The synthesis method was able to be extended to nanostructured Pt-Sn for ethanol oxidation in alkaline media. Nanostructured Pt-Sn electrocatalysts were evaluated in a unique approach tailored to electrocatalytic studies in alkaline media. At low temperatures, nanostructured Pt-Sn electrocatalysts were found to have significantly higher ethanol oxidation activity than a comparable nanostructured Pt catalyst. At higher temperatures, the oxygen-containing species contribution likely provided by Sn is insignificant due to a more oxidized Pt surface. The importance of the surface coverage of oxygen-containing species in the reaction mechanism is established in these studies. The investigations in this work present original studies of anion exchange ionomers as entrapment materials for rotating disc electrode (RDE) studies in alkaline media. Their significance is linked to the development of membrane electrode assemblies (MEAs) with the same ionomer for a KOH-free alkaline fuel cell (AFC). 4 5

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Enhanced activity for ethanol electrooxidation on Pt–MgO/C catalysts

Cited by 130 publications

References 29 publications

Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Electrochemically Fabricated Nanostructures in Energy Storage and Conversion Applications

Nanostructured electrocatalyst for fuel cells : silica templated synthesis of Pt/C composites.

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