Formation of porous and dense Pt/C catalyst films using electrohydrodynamic atomisation deposition

Wang, Dazhi; Hong-bin, Duan; Liang, Junsheng; Liu, Chong

doi:10.1049/mnl.2012.0018

Cited by 6 publications

(6 citation statements)

References 22 publications

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“…The average pore size was w2 mm for the cathode CL and w4 mm for the anode CL, which are suitable for the transport of reactants and reaction products [32]. The pore size at sub-micrometre in size can be further adjusted by the control of the working parameters of working distance and flow rate using the EHDA deposition technique, which was observed in our previous work [33]. The porous behaviour of the deposited films can be attributed to the atomize-deposited relics that were formed during the EHDA process [34].…”

Section: Single Dmfc Testmentioning

confidence: 76%

“…The cathode CL and Nafion membrane were fabricated by successively EHDA LbL deposition of Pt/C nano-suspension and Nafion solution on carbon paper substrate. The droplet atomized by EHDA process from Pt/C nano-suspension are nanometres in size and thus the cathode CL was formed by the deposition of nano-structures LbL on the porous GDL [33], which can give well-knit contact between CL and GDL. Moreover, the EHDA initially deposited Nafion membrane on the cathode CL was liquid form and will perform a drying process in order to remove the solvent in the Nafion membrane.…”

Section: Lift Test Of Single Dmfcmentioning

confidence: 99%

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Formation of an integrated catalyst-coated membrane using electrohydrodynamic atomization Layer-by-Layer deposition for direct methanol fuel cells

Wang

Liang

et al. 2013

Journal of Power Sources

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Section: Single Dmfc Testmentioning

confidence: 76%

Section: Lift Test Of Single Dmfcmentioning

confidence: 99%

Formation of an integrated catalyst-coated membrane using electrohydrodynamic atomization Layer-by-Layer deposition for direct methanol fuel cells

Wang

Liang

et al. 2013

Journal of Power Sources

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“…It can be deduced that the sharp‐angled heave is the edge of the graphene sheet. It was observed in our previous Letter, that a shorter working distance produced larger sized droplets during the EHDA process because of reduced droplet break‐up and solvent evaporation during their shorter travelling time from the nozzle exit to the substrate [17]. Therefore at the working distance of 1 mm the atomised graphene droplets are large compared with that at the 3 mm working distance.…”

Section: Resultsmentioning

confidence: 95%

Patterning of graphene microscale structures using electrohydrodynamic atomisation deposition of photoresist moulds

Wang

Liang

et al. 2014

Micro & Nano Letters

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In this reported work, a graphene suspension was atomised and deposited using the electrohydrodynamic atomisation technique, enabling the formation of a wide range of graphene thin films. The influences of the atomisation-substrate distance on the characteristics of the graphene films and their sheet resistances were analysed. A distance of 3 mm was found to be the optimum deposition distance for this graphene suspension to produce an even film and a low sheet resistance. At a lower and a higher working distance the graphene films exhibited a sharp-angled heave surface behaviour and a high sheet resistance. In addition, electrohydrodynamic atomisation combined with a photolithography polymeric micromoulding technique was used to form graphene structures. After removing the photoresist micromould, the graphene structures remained under well-arranged characteristics. After two layers of electrohydrodynamic atomisation deposition at a working distance of 3 mm, the thickness of the film was ∼400 nm and exhibited a sheet resistance of 127.5 Ω sq −1 (ohms per square).

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“…Figure 1 shows the EHDA deposition equipment, which comprises of an electrohydrodynamic deposition system coupled together with a computer controlled X-Y movement stage and a microscopic vision device. The details of the EHDA deposition equipment were described in our previous work [17]. Figure 2a and b show the assembled HTMFC and the flow-field plate.…”

Section: Preparation Of Clsmentioning

confidence: 99%

Formation of Membrane Electrode Assembly for High Temperature Methanol Fuel Cells

Wang

Zhu

Zha

et al. 2015

KEM

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In this work, a quaternized polysulfone/PTFE/H3PO4composite membrane was prepared and used to a high temperature sustainable proton exchange membrane (HTPEM). This HTPEM was prepared based on a porous PTFE membrane, which can sustainable for 200 °C. Pt/C nano-suspension was prepared and deposited layer-by-layer on the gas diffusion layer (GDL) using electrohydrodynamic atomization (EHDA) deposition technique for the formation of cathode and anode catalyst layers (CLs). The CLs presented well packed and porous features. This EHDA deposited cathode and anode CLs, GDL and HTPEM were assembled to a membrane electrode assembly (MEA) and high temperature methanol fuel cell (HTMFC). The results showed that low concentration and high flow rate of methanol aqueous solution led to the loss of phosphoric acid on HTPEM, which resulted in the decline of the HTPEM. When the concentration and the flow rate of the methanol aqueous solution was increased and reduced, respectively, the cell can work properly at a temperature of 170 °C.

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Formation of porous and dense Pt/C catalyst films using electrohydrodynamic atomisation deposition

Cited by 6 publications

References 22 publications

Formation of an integrated catalyst-coated membrane using electrohydrodynamic atomization Layer-by-Layer deposition for direct methanol fuel cells

Formation of an integrated catalyst-coated membrane using electrohydrodynamic atomization Layer-by-Layer deposition for direct methanol fuel cells

Patterning of graphene microscale structures using electrohydrodynamic atomisation deposition of photoresist moulds

Formation of Membrane Electrode Assembly for High Temperature Methanol Fuel Cells

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