Graphene-supported platinum catalysts for fuel cells

Šešelj, Nedjeljko; Engelbrekt, Christian; Zhang, Jingdong

doi:10.1007/s11434-015-0745-8

Cited by 96 publications

(58 citation statements)

References 119 publications

(113 reference statements)

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“…[16][17][18][19] GO has hydroxyl, epoxy and carboxyl groups at the edges and on the basal plane, which make the GO materials hydrophilic and dispersible in aqueous solutions. [25][26][27][28][29] The use of plasma-liquid interaction, where charge transfer processes take place, is currently a rapidly developing alternative technique for preparation of catalyst nanoparticles. [16][17][18][19][20][21] Moreover, rGO based 2-D platform is used to stabilize supported metal NPs.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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Platinum nanoparticles were deposited on reduced graphene oxide (rGO) and nitrogen-doped rGO (rGOÀN) by He/H 2 plasma jet treatment of H 2 PtCl 6 aqueous solution for electroreduction of oxygen. Physical characterization of the prepared catalysts was performed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical characterization was carried out by cyclic voltammetry and CO-stripping techniques. The oxygen reduction reaction (ORR) activity of the prepared Pt/rGO and Pt/ rGOÀN catalyst materials was investigated using the rotating disk electrode method in 0.1 M KOH and 0.05 M H 2 SO 4 . In both acidic and alkaline electrolytes, the catalyst materials prepared by the plasma jet method demonstrated superior electrocatalytic properties compared to that of commercial 20 wt% Pt/ C catalyst. Specific activity values for the ORR in acid electrolyte were 2-fold and in alkaline media more than 3-fold higher than that obtained for commercial Pt/C catalyst.

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Section: Introductionmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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“…Stability and conductivity of the catalysts are essential, i.e., fast electron transfer from the active site at the catalyst surface through the support material to the external circuit. [13] Graphene has been used as a support for metal NPs such as Pt, [14] Pt-Fe, [15] Pt-Co, [15] Pt-Au alloy, [16] and Fe/Co-N. [17] In the present work, we demonstrate a three-step method for the preparation of electrocatalysts equipped with 9.5 ± 2 nm Au@Pt NPs covalently anchored on graphene (G-Cys-Au@Pt). [11] However, these carbon materials can be oxidized at potentials above 0.8 V versus standard hydrogen electrode.…”

mentioning

confidence: 99%

Tailored Electron Transfer Pathways in Au_core/Pt_shell–Graphene Nanocatalysts for Fuel Cells

Šešelj

Engelbrekt

Ding

et al. 2018

Advanced Energy Materials

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Aucore/Ptshell–graphene catalysts (G‐Cys‐Au@Pt) are prepared through chemical and surface chemical reactions. Au–Pt core–shell nanoparticles (Au@Pt NPs) covalently immobilized on graphene (G) are efficient electrocatalysts in low‐temperature polymer electrolyte membrane fuel cells. The 9.5 ± 2 nm Au@Pt NPs with atomically thin Pt shells are attached on graphene via l‐cysteine (Cys), which serves as linkers controlling NP loading and dispersion, enhancing the Au@Pt NP stability, and facilitating interfacial electron transfer. The increased activity of G‐Cys‐Au@Pt, compared to non‐chemically immobilized G‐Au@Pt and commercial platinum NPs catalyst (C‐Pt), is a result of (1) the tailored electron transfer pathways of covalent bonds integrating Au@Pt NPs into the graphene framework, and (2) synergetic electronic effects of atomically thin Pt shells on Au cores. Enhanced electrocatalytic oxidation of formic acid, methanol, and ethanol is observed as higher specific currents and increased stability of G‐Cys‐Au@Pt compared to G‐Au@Pt and C–Pt. Oxygen reduction on G‐Cys‐Au@Pt occurs at 25 mV lower potential and 43 A gPt−1 higher current (at 0.9 V vs reversible hydrogen electrode) than for C–Pt. Functional tests in direct fomic acid, methanol and ethanol fuel cells exhibit 95%, 53%, and 107% increased power densities for G‐Cys‐Au@Pt over C–Pt, respectively.

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“…Graphene is another promising candidate supports material for fuel cell catalysts as it exhibits high catalyst loading and good electrocatalysis and stability properties [76]. Recently, modified graphene support materials have been shown to exhibit enhanced performance.…”

Section: Support Materialsmentioning

confidence: 99%

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Wang

Peng

et al. 2016

Energies

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Fuel cells are the most clean and efficient power source for vehicles. In particular, proton exchange membrane fuel cells (PEMFCs) are the most promising candidate for automobile applications due to their rapid start-up and low-temperature operation. Through extensive global research efforts in the latest decade, the performance of PEMFCs, including energy efficiency, volumetric and mass power density, and low temperature startup ability, have achieved significant breakthroughs. In 2014, fuel cell powered vehicles were introduced into the market by several prominent vehicle companies. However, the low durability and high cost of PEMFC systems are still the main obstacles for large-scale industrialization of this technology. The key materials and components used in PEMFCs greatly affect their durability and cost. In this review, the technical progress of key materials and components for PEMFCs has been summarized and critically discussed, including topics such as the membrane, catalyst layer, gas diffusion layer, and bipolar plate. The development of high-durability processing technologies is also introduced. Finally, this review is concluded with personal perspectives on the future research directions of this area.

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Graphene-supported platinum catalysts for fuel cells

Cited by 96 publications

References 119 publications

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Tailored Electron Transfer Pathways in Au_core/Pt_shell–Graphene Nanocatalysts for Fuel Cells

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

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Graphene-supported platinum catalysts for fuel cells

Cited by 96 publications

References 119 publications

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Tailored Electron Transfer Pathways in Aucore/Ptshell–Graphene Nanocatalysts for Fuel Cells

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

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Tailored Electron Transfer Pathways in Au_core/Pt_shell–Graphene Nanocatalysts for Fuel Cells