Porous graphene supported Pt catalysts for proton exchange membrane fuel cells

Cheng, Kun; He, Daping; Peng, Tao; Lv, Haifeng; Pan, Mu

doi:10.1016/j.electacta.2014.03.181

Cited by 61 publications

(44 citation statements)

References 25 publications

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“…More precisely, MWCNTs act as conducting bridges between the FGLs while FGLs act as spacer between CNTs increasing thus the number of available catalyst particles for ORR. This conclusion comforts the trend reported in literature, showing that the reactant diffusion in graphene containing layer can be improved by using porous graphene [35] or composite [36].…”

Section: Discussionsupporting

confidence: 92%

Optimization and Tunability of 2D Graphene and 1D Carbon Nanotube Electrocatalysts Structure for PEM Fuel Cells

et al. 2018

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In this work, N-doped Multi-Walled Carbon Nanotubes (MWCNTs) and Few Graphene Layers (FGLs) have been functionalized with platinum nanoparticles using two methods starting with hexachloroplatinic acid as precursor: (i) ethylene glycol (EG) reduction and (ii) impregnation followed by reduction in hydrogen atmosphere. Morphological scanning transmission electron microscopy (STEM) analyses showed a homogenous dispersion of metal particles with narrow-size distribution onto both carbon supports (Pt/C loadings between 30 wt % and 40 wt %). Electrocatalytic properties of the as-synthetized catalysts toward the Oxygen Reduction Reaction (ORR) was evaluated in aqueous electrolyte using a three electrodes electrochemical cell by cyclic voltammetry (CV) in rotating disk electrode (RDE). It is shown that a mixture of Pt supported on MWCNT and FGLs allows to enhance both the electrochemical surface area and the activity of the catalyst layer. Ageing tests performed on that optimized active layer showed higher stability than conventional Pt/C.

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Section: Discussionsupporting

confidence: 92%

Optimization and Tunability of 2D Graphene and 1D Carbon Nanotube Electrocatalysts Structure for PEM Fuel Cells

et al. 2018

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“…He et al (2014) showed that the sulfonated reduced GO provides a great potential for the PEMFC catalyst material due to the enhanced activity and durability . Cheng et al (2014) also found that the porous graphene nanosheet significantly improved the mass diffusion pathways and electrochemical surface area, resulting in the enhanced electrochemical reaction . Jafri et al (2015) reported that the N 2 ‐doped graphene enhances the ORR to potentially serve as a new PEMFC catalyst .…”

Section: Introductionmentioning

confidence: 99%

Enhanced transport properties of graphene-based, thin Nafion® membrane for polymer electrolyte membrane fuel cells

et al. 2017

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Summary A polymer electrolyte membrane fuel cell (PEMFC) is one of the promising renewable energy conversion systems; however, its performance is considerably limited by the sluggish transport properties and/or reaction kinetics of the catalyst layers, especially at a high current density. In this study, graphene‐based, thin Nafion® membranes are prepared using 0 to 4 wt% of graphene nanoflakes, and the effects of the graphene are examined for enhanced transport properties. The electrical conductivity and dielectric constant are drastically enhanced to 0.4 mS/cm and 26 at 4 wt% of graphene nanoflakes, respectively, while the thermal conductivity linearly increases to 3 W/m‐K. The proton conductivity also significantly increases with the aid of graphene nanoflakes at >2 wt% of graphene nanoflakes, and the enhancement doubles compared with those of the carbon‐black (CB)‐based and carbon nanotube (CNT)‐based, thin Nafion® membranes, perhaps due to unique graphene structures. Additionally, the quasi‐steady‐state water contact angle increases from 113° to ~130° with the addition of graphene nanoflakes, showing that a hydrophobic‐like water wetting change may be related to the significant proton conductivity enhancement. This work provides an optimal material design guideline for the transport‐enhanced cathode catalyst layer using graphene‐based materials for polymer electrolyte membrane fuel cell applications.

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“…As scan was done before 0.2 V, the plateau shows no affect towards the current generated from the secondary hydrogen evolution reaction or the mixed region. Cheng et al reported Pt on porous graphene showed 1.8 times more mass activity than Pt/C [40]. The calculated mass and specific activities at 0.6 V for Pt/PENT were 2.1 and 1.3 times higher compared to Pt/C respectively.…”

Section: Resultsmentioning

confidence: 94%

Platinum decorated on partially exfoliated multiwalled carbon nanotubes as high performance cathode catalyst for PEMFC

Sahoo

Scott

Ramaprabhu

2015

International Journal of Hydrogen Energy

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Porous graphene supported Pt catalysts for proton exchange membrane fuel cells

Cited by 61 publications

References 25 publications

Optimization and Tunability of 2D Graphene and 1D Carbon Nanotube Electrocatalysts Structure for PEM Fuel Cells

Optimization and Tunability of 2D Graphene and 1D Carbon Nanotube Electrocatalysts Structure for PEM Fuel Cells

Enhanced transport properties of graphene-based, thin Nafion® membrane for polymer electrolyte membrane fuel cells

Platinum decorated on partially exfoliated multiwalled carbon nanotubes as high performance cathode catalyst for PEMFC

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