Highly efficient CO2 bubble removal on carbon nanotube supported nanocatalysts for direct methanol fuel cell

Chen, Soon-Lin; Lin, Chun-Ting; Chieng, Ching-Chang; Tseng, Fan‐Gang

doi:10.1016/j.jpowsour.2009.09.058

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…All of the electrochemical tests were performed in a standard three-electrode system on an electrochemical workstation (Model 760B, CH Instruments, Inc., USA) at room temperature (25 • C). 35,36 To prepare the working electrodes, the geometric reaction area of the fabricated electrodes was defined as 1 cm 2 (1 cm × 1 cm), and acid electroforming tape (my15mm, Blue Giant Inc., Taiwan) was used to protect the border during the electrochemical measurements. A Pt-coated Ti mesh and saturated calomel electrode (SCE) were used as the counter and reference electrode, respectively.…”

Section: Methodsmentioning

confidence: 99%

Thickness Control over Ionomer Coatings on Nano Patterned Three-Phase Zones for a Highly Efficient Electrode

Yeh

et al. 2012

J. Electrochem. Soc.

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In the present study, a carbon nanotube supported platinum (Pt/CNT) electrode with a thin and uniform ionomer layer as the proton-conducting electrolyte on a nano patterned three-phase zone (TPZ) was fabricated, aiming at high electrocatalytic activity and high charge transfer rate for methanol oxidation reaction (MOR). Unlike conventional paste or spray methods that produced thick and non-uniform ionomer layers to form TPZs within the catalyst layers (50-100 μm) of electrodes, thin and uniform ionomer layers (5-10 nm) on the hydrophilic-treated Pt/CNT catalyst electrodes (8 μm) were harvested by spin-coating. The thickness of the ionomer layer was controlled by altering the spin-coating speed, and the effect of the ionomer thickness on the surface of the catalyst layer and on the electrochemical properties of the electrodes for MOR was studied (mass activity, MA and charge transfer resistance, Rct). Compared to the electrode fabricated by spraying (MA: 355 A g −1 , Rct: 48 cm 2 ), the ionomer-coated electrode spin-coated at 4000 rpm exhibited superior properties for MOR (MA: 381 A g −1 , Rct: 15 cm 2 ). The outcome renders this new electrode to embrace potential applications in micro direct methanol fuel cells (μDMFCs) with the design of a thin and uniform TPZ.

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Section: Methodsmentioning

confidence: 99%

Thickness Control over Ionomer Coatings on Nano Patterned Three-Phase Zones for a Highly Efficient Electrode

Yeh

et al. 2012

J. Electrochem. Soc.

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“…4, and the carbon nanotube has a diameter of 40 ~ 60 nm. The CNT/CC supports were cut into 1 cm*2 cm size of area prior to hydrophilic treatment [8]. After hydrophilic treatment and then depositing catalysts of Pt/Ru on the CNT/CC supports, the supports would be coated with Teflon to define the electrode of electrochemical reaction zone (Fig.…”

Section: A Carbon Support Preparationmentioning

confidence: 99%

Enhancement of catalytic efficiency by partial replacement of ruthenium with platinum nanoparticles for direct methanol fuel cell

Chang

Lin

et al. 2014

The 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

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In this paper, an open-loop reduction system (OLRS)[1] is employed to produce the core-shell Pt (platinum)/Ru (ruthenium) catalysts on the carbon nanotube/carbon fiber supports (CNT/CF) for direct methanol fuel cell (DMFC) application. By adjusting pH value of the ionized reduction environment, Pt 4+ can be first converted into Pt 2+ to allow partial Ru replacement with Pt by redox transmetalation and produce Pt/Ru core-shell nano structures [2,3]. Methanol oxidation efficiency and carbon monoxide (CO) poisoning tolerance of the prepared core-shell nano catalysts can be greatly enhanced by our developed OLRS compared to conventional reflux system [4].

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“…DMFCs are considered efficient energy devices for various applications, such as stationary power plants, electronic vehicles, unmanned aerial vehicle power, portable electronic devices, forklift power, single soldier power, and backup power for laptops [ 27 , 42 , 47 , 48 ]. At the anode, the methanol oxidation reaction (MOR) occurs, where the combination of methanol and water generates six electrons and protons with a byproduct of carbon dioxide (CO 2 ) [ 49 , 50 , 51 , 52 ]. To complete the reaction, electrons and protons move to the cathode side through an external electric circuit and proton transport membrane.…”

Section: Introductionmentioning

confidence: 99%

Modified Cellulose Proton-Exchange Membranes for Direct Methanol Fuel Cells

Palanisamy

Thangarasu

2023

Polymers

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A direct methanol fuel cell (DMFC) is an excellent energy device in which direct conversion of methanol to energy occurs, resulting in a high energy conversion rate. For DMFCs, fluoropolymer copolymers are considered excellent proton-exchange membranes (PEMs). However, the high cost and high methanol permeability of commercial membranes are major obstacles to overcome in achieving higher performance in DMFCs. Novel developments have focused on various reliable materials to decrease costs and enhance DMFC performance. From this perspective, cellulose-based materials have been effectively considered as polymers and additives with multiple concepts to develop PEMs for DMFCs. In this review, we have extensively discussed the advances and utilization of cost-effective cellulose materials (microcrystalline cellulose, nanocrystalline cellulose, cellulose whiskers, cellulose nanofibers, and cellulose acetate) as PEMs for DMFCs. By adding cellulose or cellulose derivatives alone or into the PEM matrix, the performance of DMFCs is attained progressively. To understand the impact of different structures and compositions of cellulose-containing PEMs, they have been classified as functionalized cellulose, grafted cellulose, acid-doped cellulose, cellulose blended with different polymers, and composites with inorganic additives.

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Highly efficient CO2 bubble removal on carbon nanotube supported nanocatalysts for direct methanol fuel cell

Cited by 8 publications

References 17 publications

Thickness Control over Ionomer Coatings on Nano Patterned Three-Phase Zones for a Highly Efficient Electrode

Thickness Control over Ionomer Coatings on Nano Patterned Three-Phase Zones for a Highly Efficient Electrode

Enhancement of catalytic efficiency by partial replacement of ruthenium with platinum nanoparticles for direct methanol fuel cell

Modified Cellulose Proton-Exchange Membranes for Direct Methanol Fuel Cells

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