Pd nanoparticles supported on functionalized multi-walled carbon nanotubes (MWCNTs) and electrooxidation for formic acid

Yang, Sudong; Zhang, Xiaogang; Mi, Hongyu; Ye, Xiangguo

doi:10.1016/j.jpowsour.2007.09.080

Cited by 121 publications

(76 citation statements)

References 27 publications

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“…Since the pioneering works [1,2,8,9] it is well established that palladium performs particularly well as an anode catalyst [3,6,[10][11][12][13][14]. It has been shown that addition of the second metal, such as Au [2,13], and Co [15], increases the activity of Pd-based anode catalysts for formic acid electrooxidation.…”

Section: Introductionmentioning

confidence: 99%

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Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Chen

Liou

et al. 2010

Fuel Cells

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Novel multi‐wall carbon nanotubes (MWCNTs) supported Pd–Au catalyst for electrooxidation of formic acid was prepared and compared with a similarly prepared Pd/MWCNTs and with a commercial Pt–Ru/Vulcan catalyst. The catalysts were prepared by a two‐stage polyol method, followed by H2–Ar annealing and were characterised by using X‐ray diffraction, FE‐TEM and EDX. Cyclic voltammetry (CV) was used to test their catalytic activity towards formic acid electrooxidation and accessible metal surface in the catalyst layer. In the case of the precursor of Pd–Au/MWCNTs catalyst (before H2–Ar annealing), subsequent deposition of Pd and Au led to a material of the core‐shell structure, catalytically inactive. Annealing of the core shell Pd–Au/MWCNTs precursor in H2–Ar resulted in the formation of the novel Pd–Au/MWCNTs catalyst. A highly dispersed Pd–Au solid solution (average XRD particle size 4.8 nm) is formed, and the novel catalyst is more active than the Pd/MWCNTs one. Both the Pd–Au/MWCNTs and the Pd/MWCNTs catalysts turned out to be more active than a commercial, highly dispersed Pt–Ru/Vulcan catalyst.

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Section: Introductionmentioning

confidence: 99%

“…Until now, there are only few reports on the application of CNTs as a catalyst support of Pd-based catalysts for formic acid electrooxidation [10,46]. Pd on MWCNTs has been shown to be an efficient catalyst of formic acid oxidation [10].…”

Section: Introductionmentioning

confidence: 99%

Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Chen

Liou

et al. 2010

Fuel Cells

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“…Further, Ag, Cu, Pt and Ag@Au NPs were also successfully synthesized in situ on the surface of CNT/DEN with a great control on its particle size. The Pd NPs were also deposited on the surface of MWCNTs which were initially functionalized with thiol [56], benzenesulfonic [57] and ionic liquid functionalized MWCNTs [58]. Banerjee et.al.…”

Section: Modification Through Covalent Attachmentmentioning

confidence: 99%

Chemically Modified Carbon Nanotubes: Derivatization and Their Applications

Malingappa¹,

Raghu²

2011

Carbon Nanotubes Applications on Electron Devices

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“…In the last few years, many papers have been devoted to the oxidation of small organic molecules, like methanol [3,4,[14][15][16][17][18][19][20][21][22], ethanol [4,16,20,[23][24][25][26][27], and formic acid [20,[28][29][30][31], on palladium and palladium composite electrodes. From the aforementioned papers, a conclusion can be drawn that palladium is a good catalyst for oxidation of small organic molecules with the electroactivity comparable to the platinum catalysts.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the reactions of hydrogen sorption/desorption and methanol oxidation on bifunctional Ni/Pd electrode in alkaline solution

Skowroński

Rozmanowski

2012

J Solid State Electrochem

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The present paper is aimed at studying the influence of the hydrogen sorption/desorption process occurring on the layered nickel-palladium (Ni/Pd) electrode on the kinetics of the reaction of methanol oxidation in strong alkaline KOH solution. The electrodes were prepared by chemical deposition of a thin layer of porous palladium on a nickel foam support. A scanning electron microscope was used for studying the morphology of both the nickel support and the porous palladium layer. The mechanism of the anodic desorption of hydrogen changes depending on whether or not 6 M KOH electrolyte is admixed with methanol. It was shown that, in the first cycle of the cyclic voltammetry (CV) measurements, the anodic peak current and peak charge related to the oxidative desorption of hydrogen significantly decrease due to the presence of methanol in KOH. This effect is attributed to the obstacles in hydrogen sorption due to the formation of a passivating layer on the Pd surface composed of both adsorbed methanol molecules and the intermediate products involving adsorbed CO. On the other hand, hydrogen desorbing from Pd electrode exerts influence on the kinetics of the reaction of methanol oxidation. Ni/Pd electrode undergoes considerable reactivation due to the potentiostatic saturation with hydrogen at −1.1 V, followed by the ease in hydrogen desorption. The CV measurements proved that, after such a treatment, the peak of hydrogen desorption partially overlaps the double peak of methanol oxidation and, in consequence, the rate of methanol oxidation is enhanced. The positive effect of hydrogen releasing from the electrode on the kinetics of the reaction of methanol oxidation is ascribed to the anti-poison behavior consisting in the reaction of hydrogen radicals with intermediates adsorbed on the Pd surface.

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Pd nanoparticles supported on functionalized multi-walled carbon nanotubes (MWCNTs) and electrooxidation for formic acid

Cited by 121 publications

References 27 publications

Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Chemically Modified Carbon Nanotubes: Derivatization and Their Applications

Relationship between the reactions of hydrogen sorption/desorption and methanol oxidation on bifunctional Ni/Pd electrode in alkaline solution

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