Improved catalytic activity of mixed platinum catalysts supported on various carbon nanomaterials

Zhang, Jie; Tang, Shuihua; Liao, Longyu; Yu, Weifei; Li, Jinshan; Seland, Frode; Haarberg, Geir Martin

doi:10.1016/j.jpowsour.2014.05.137

Cited by 38 publications

(11 citation statements)

References 29 publications

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“…At the three‐phase boundary of a membrane electrode assembly, the catalyst performance is actually subject to multiple of issues, such as thermal/water management and mass‐transport limitations. Available electron‐transfer pathways and facilitated mass transport can dramatically enhance the activity of a catalyst . Catalyst supports are considered to be one of the key performance‐determining components due to complex morphological structures affecting both mass‐transport phenomena and Pt utilization .…”

Section: Introductionsupporting

confidence: 79%

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Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Liu

Zeng

et al. 2016

ChemElectroChem

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A new class of hybrid support is prepared by chemical vapor deposition of acetylene yielding carbon nanofibers (CNFs) on electrolessly plated Ni3P on carbon nanotubes (Ni3P/CNT). The as‐prepared Ni3P/CNT–CNF hybrid is used to support platinum nanoparticles, produced by the microwave‐assisted ethylene glycol reduction method, as an electrocatalyst (Pt/Ni3P/CNT–CNF). The as‐prepared Ni3P/CNT–CNF hybrid and Pt/Ni3P/CNT–CNF catalyst are characterized by SEM, TEM, XRD, and thermogravimetric analysis. Electrochemical evaluations of the electrocatalyst are performed for methanol oxidation and oxygen reduction reactions. The electrochemical active surface area of Pt/Ni3P/CNT–CNF, evaluated both by hydrogen adsorption cyclic voltammetry (CV; 95 m2 g−1) and CO anodic stripping CV (106 m2 g−1), is higher than that of a Pt/CNT benchmark. Electrochemical evaluation of methanol oxidation and oxygen reduction reactions indicate that as‐prepared Pt/Ni3P/CNT–CNF shows enhanced activity relative to that of commercial Pt/C‐JM and Pt/CNT. The superior performance of as‐prepared Pt/Ni3P/CNT–CNF is mostly attributed to the improved electron transfer and facilitated mass transport originating from the tailor‐made Ni3P/CNT–CNF hybrid support.

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Section: Introductionsupporting

confidence: 79%

“…In this regard, a number of recent studies have focused on optimizing the catalyst layer structure and improving mass transfer in electrochemical reactions . Zhang et.al . studied Pt catalysts on various carbon nanomaterials (e.g.…”

Section: Introductionmentioning

confidence: 99%

Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Liu

Zeng

et al. 2016

ChemElectroChem

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“…Specifically, three promising families of mesoporous carbons are: (1) carbon nanotubes (CNTs); (2) ordered mesoporous carbons (OMCs); and (3) colloid imprinted carbons (CICs). Other carbon supports that have been investigated include carbon nanofibres [10,11] and carbon nanocoils [12,13]. Although some promising data has been reported for these additional carbon supports, the largest focus has been on the three main families listed above.…”

Section: Introductionmentioning

confidence: 99%

Novel Mesoporous Carbon Supports for PEMFC Catalysts

et al. 2015

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Over the past decade; a significant amount of research has been performed on novel carbon supports for use in proton exchange membrane fuel cells (PEMFCs). Specifically, carbon nanotubes, ordered mesoporous carbon, and colloid imprinted carbons have shown great promise for improving the activity and/or stability of Pt-based nanoparticle catalysts. In this work, a brief overview of these materials is given, followed by an in-depth discussion of our recent work highlighting the importance of carbon wall thickness when designing novel carbon supports for PEMFC applications. Four colloid imprinted carbons (CICs) were synthesized using a silica colloid imprinting method, with the resulting CICs having pores of 15 (CIC-15), 26 (CIC-26), 50 (CIC-50) and 80 (CIC-80) nm. These four CICs were loaded with 10 wt. % Pt and then evaluated as oxygen reduction (ORR) catalysts for use in proton exchange membrane fuel cells. To gain insight into the poorer performance of Pt/CIC-26 vs. the other three Pt/CICs, TEM tomography was performed, indicating that CIC-26 had much thinner walls (0-3 nm) than the other CICs and resulting in a higher OPEN ACCESSCatalysts 2015, 5 1047 resistance (leading to distributed potentials) through the catalyst layer during operation. This explanation for the poorer performance of Pt/CIC-26 was supported by theoretical calculations, suggesting that the internal wall thickness of these nanoporous CICs is critical to the future design of porous carbon supports.

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“…Usually, a carbon-based material is the most commonly used catalyst support. 11 Carbon powder as the catalyst support has been commercialized. However, carbon corrosion leads to the decrease of catalytic activity during the long term operation of DMFC.…”

Section: Introductionmentioning

confidence: 99%

Multiphase sodium titanate/titania composite nanostructures as Pt-based catalyst supports for methanol oxidation

Sui

Wang

et al. 2015

J. Mater. Chem. A

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Sodium titanate/titania composite nanotubes/nanorods (STNS) are synthesized from anatase titania by the hydrothermal method and subsequent annealing in the range of 300-700 C. The changes in the composition and morphology of STNS are investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results reveal that the composition of STNS changes from "Na 2Àx H x Ti 2 O 5 " to "Na 2 Ti 6 O 13 " and their morphology changes from nanotubes to nanorods. The products obtained at 400 C and 600 C correspond to the intermediate state of reactions. Pt-based catalysts are prepared by a microwave-assisted ethylene glycol process, and are also characterized by physical analysis and electrochemical measurements. The variations of the catalytic activity and stability of Pt/C-STNS catalysts show the interesting "M" shape with the increase of the annealing temperature of STNS. The Pt nanoparticles supported on STNS-400 nanotubes and STNS-600 nanorods exhibit more uniform dispersion and superior electrocatalytic performance for methanol electrooxidation. The main reason seems to be that both of them are multiphase composites with a large number of phase interfaces and crystal defects, which is conducive to the deposition of Pt nanoparticles. The uniform dispersion of Pt nanoparticles plays an essential role in the electrochemical performance of catalysts. In addition, the presence of the "anatase TiO 2 " phase in both of them can further enhance the electrochemical performance due to the metal-support interaction. Moreover, compared to commercial Pt/C, the Pt/C-STNS-600 catalyst exhibits higher electrochemical activity and stability, suggesting that superior catalysts can be developed by designing the structure and composition of the supports.

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Improved catalytic activity of mixed platinum catalysts supported on various carbon nanomaterials

Cited by 38 publications

References 29 publications

Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Novel Mesoporous Carbon Supports for PEMFC Catalysts

Multiphase sodium titanate/titania composite nanostructures as Pt-based catalyst supports for methanol oxidation

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Improved catalytic activity of mixed platinum catalysts supported on various carbon nanomaterials

Cited by 38 publications

References 29 publications

Platinum Nanoparticles on Interconnected Ni3P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Platinum Nanoparticles on Interconnected Ni3P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Novel Mesoporous Carbon Supports for PEMFC Catalysts

Multiphase sodium titanate/titania composite nanostructures as Pt-based catalyst supports for methanol oxidation

Contact Info

Product

Resources

About

Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells

Platinum Nanoparticles on Interconnected Ni₃P/Carbon Nanotube–Carbon Nanofiber Hybrid Supports with Enhanced Catalytic Activity for Fuel Cells