Pt electrodeposited over carbon nano-networks grown on carbon paper as durable catalyst for PEM fuel cells

Negro, E.; Latsuzbaia, Roman; Dieci, Maurizio; Boshuizen, Ivo; Koper, Ger J. M.

doi:10.1016/j.apcatb.2014.11.017

Cited by 33 publications

(25 citation statements)

References 46 publications

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“…This results in an increase of the double layer capacitance of the electrode due to the formation of functional groups on the carbon surface and the roughening of the carbon surface. 37,38 The carbon corrosion is therefore evident from the relative changes in the double layer capacitance of the electrode. The cyclic voltammogram of the Pt/GCNT cathode in Fig.…”

Section: Elementmentioning

confidence: 99%

Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells

Pham

McPhail

Mattevi

et al. 2016

J. Electrochem. Soc.

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Catalyst degradation is one major challenge preventing the worldwide commercialization of the Proton Exchange Membrane Fuel Cells. In this study, we investigate the development of a novel hierarchical carbonaceous support for the platinum catalysts, called graphene-carbon nanotube hybrids (GCNT), and its degradation behavior during an accelerated degradation test. The carbon support is fabricated by growing graphene directly onto carbon nanotubes to form a unique all-carbon nanostructure possessing both an ultra-high density of exposed graphitic edges of graphene and a porous structure of carbon nanotubes. The GCNT-supported platinum catalyst exhibits a higher intrinsic catalytic activity than a carbon black-supported platinum catalyst, and much higher than a CNT-supported platinum catalyst. The enhanced catalytic activity of the GCNT-supported platinum catalyst is explained by the high graphitic edge density which promotes the catalytic reactions on platinum catalyst. The GCNT-supported platinum catalyst also exhibits a superior electrochemical stability over that of the carbon black-supported platinum catalyst, explained by the high crystallinity of the GCNT support. The superior stability is expressed by a lower loss in polarization performance, a smaller increase in charge transfer resistance, a lower loss in the platinum electrochemical surface area, a lower rate of carbon corrosion, and a more stable catalyst microstructure. Energy security and climate change have become major global concerns, and viable candidates for renewable energy technologies are actively being sought. With high energy conversion efficiencies and low emissions, fuel cell technologies have received much research attention recently.

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Section: Elementmentioning

confidence: 99%

Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells

Pham

McPhail

Mattevi

et al. 2016

J. Electrochem. Soc.

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“…Recently, many groups have contributed their efforts to figure out the optimum conditions for the electrochemical deposition of PtNPs onto the support material surface. [37][38][39][40][41][42][43][44][45][46]67,68 Porous Pt aggregates of different shape and surface morphology have been electrochemically deposited on carbon nanotube layer. 41 Basically, two different deposition techniques were applied namely, pulse electrodeposition in which the working electrode was kept switching between two constant potentials and CV at a constant scan rate.…”

Section: Resultsmentioning

confidence: 99%

“…Electrochemical deposition is one of the most efficient and versatile methods used for the direct growth of PtNPs in a controlled manner. [35][36][37][38][39][40] Chen et al deposited porous PtNPs on a carbon nanotube (CNT) film in 0.5 M H 2 SO 4 solution using the electrodeposition technique. 41 They succeeded to prepare Pt aggregates of different shapes and morphology by tailoring the deposition parameters.…”

mentioning

confidence: 99%

Platinum Particles Electrochemically Deposited on Multiwalled Carbon Nanotubes for Oxygen Reduction Reaction in Acid Media

Hussain

Erikson

Kongi

et al. 2017

J. Electrochem. Soc.

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Platinum nanoparticles supported on multiwalled carbon nanotubes (Pt/MWCNT) were prepared using controlled electrochemical deposition from Ar-saturated H 2 PtCl 6 solution. The electrodeposition parameters were varied to observe change in the surface morphology and electrocatalytic activity of the Pt/MWCNT catalysts for oxygen reduction reaction (ORR). Surface morphology of the prepared catalysts was studied by scanning electron microscope (SEM) and scanning transmission electron microscope (STEM). For electrochemical characterization of the Pt/MWCNT electrocatalysts, CO-stripping and cyclic voltammetry (CV) experiments were performed in 0.05 M H 2 SO 4 solution. The ORR was studied in acid medium using the rotating disk electrode (RDE) method. The results obtained were analyzed and compared to those of commercial Pt/C. The size, shape and distribution of Pt particles as well as the electrochemical behavior of Pt/MWCNT modified electrodes showed strong dependence on the deposition parameters. The catalyst materials prepared by electrochemical deposition showed higher specific activities than commercial Pt/C catalyst. The Pt/MWCNT cathode materials showed remarkable stability during repetitive potential cycling in 0. Proton exchange membrane fuel cell (PEMFC) is identified as one of the most promising environmentally friendly sustainable energy conversion devices that efficiently convert fuel energy into electricity through electrochemical processes. [1][2][3] In comparison to the conventional internal combustion engine, low-temperature fuel cells are preferred for energy conversion in vehicles because of its green operating system, high efficiency and renewable energy resources.4,5 One of the most critical challenges for commercializing fuel cells is the development of more efficient, highly active and durable electrocatalysts to improve the sluggish kinetics of the oxygen reduction reaction (ORR). To date, Pt-based cathode catalysts have shown significantly high electrocatalytic activity toward the ORR as compared to other metals, alloys, core-shell structures, mixed metal oxides and nonnoble metal catalysts.6-15 Considerable efforts have been dedicated to minimize the amount of Pt loading and improve its electrocatalytic activity and durability, mainly because of its scarcity and high cost. [16][17][18][19]

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“…Recent studies have proven that graphitic materials such as carbon nanotubes (CNTs), nanofibers, etc. are significantly more resistant to carbon corrosion than the widely used carbon black due to the higher stability of the sp 2 -hybridized carbon [3,[11][12][13][14][15][16][17][18]. Within the TU Delft group, we developed a novel carbon material that consists of networked carbon nanostructures (CNNs), currently produced by the TU Delft spin-off company CarbonX (formerly Minus9) [11,19].…”

Section: Introductionmentioning

confidence: 99%

“…The carbonization of the surfactant, being the primary carbon source, leads to the formation of networked, sponge-like, carbon graphitic structures (CNNs), which show promising properties for application as fuel cell supports, such as high electrical conductivity, great oxidation resistance, high specific surface area, micro-and meso-porosity, surface defects increasing the material ability to disperse in solution [11][12][13][14]19]. Previous studies showed that CNNs are more durable supports for platinum catalysts in the ORR compared to commercial carbon supports, while the simplicity and versatility of the synthesis route allows a cheaper production than CNTs [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Activity and Durability of Pt-Decorated Non-Covalently Functionalized Graphitic Structures

et al. 2015

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Carbon graphitic structures that differ in morphology, graphiticity and specific surface area were used as support for platinum for Oxygen Reduction Reaction (ORR) in low temperature fuel cells. Graphitic supports were first non-covalently functionalized with pyrene carboxylic acid (PCA) and, subsequently, platinum nanoparticles were nucleated on the surface following procedures found in previous studies. Non-covalent functionalization has been proven to be advantageous because it allows for a better control of particle size and monodispersity, it prevents particle agglomeration since particles are bonded to the surface, and it does not affect the chemical and physical resistance of the support. Synthesized electrocatalysts were characterized by electrochemical half-cell studies, in order to evaluate the Electrochemically Active Surface Area (ECSA), ORR activity, and durability to potential cycling and corrosion resistance.

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Pt electrodeposited over carbon nano-networks grown on carbon paper as durable catalyst for PEM fuel cells

Cited by 33 publications

References 46 publications

Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells

Graphene-Carbon Nanotube Hybrids as Robust Catalyst Supports in Proton Exchange Membrane Fuel Cells

Platinum Particles Electrochemically Deposited on Multiwalled Carbon Nanotubes for Oxygen Reduction Reaction in Acid Media

Electrocatalytic Activity and Durability of Pt-Decorated Non-Covalently Functionalized Graphitic Structures

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