Unusually active palladium-based catalysts for the electrooxidation of formic acid

Larsen, Robert D.; Ha, Su; Zakzeski, Joseph; Masel, Richard I.

doi:10.1016/j.jpowsour.2005.07.066

Cited by 269 publications

(190 citation statements)

References 11 publications

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“…demonstrated that unsupported Pd and Pd/C catalysts can overcome the CO poisoning effect, thereby yielding high performances in direct formic acid fuel cells (DFAFCs) [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The electrooxidation of HCOOH on Pd nanostructures has been widely investigated in the literature [7][8][9][10][11][12][13][14]. Kolb et al demonstrated that the electrocatalytic activity of Pd overlayers on Au and Pt single crystal electrodes depends markedly on their crystallographic orientation; following the trend Pd(111) < Pd(110) < Pd(100) [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Influence of thermal treatments on the stability of Pd nanoparticles supported on graphitised ordered mesoporous carbons

Celorrio

Sebastián

Calvillo

et al. 2016

International Journal of Hydrogen Energy

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractThe graphitisation of ordered mesoporous carbons (CMK-3) was carried out by thermal treatments under different conditions of temperature and heating rate. The electrochemical characterization in acidic medium of the graphitised CMK-3 showed that such a thermal treatment is effective to decrease the carbon oxidation rate (corrosion) while preserving a good porosity in terms of capacitance.Besides, the graphitisation degree and, in consequence, the electrochemical corrosion resistance can be modulated by an appropriate choice of thermal treatment conditions, where the heating rate and temperature appear as critical parameters. Under certain graphitisation conditions, the carbon corrosion of CMK-3 can be minimized showing lower rates compared to a commercial carbon black (Vulcan). Palladium nanoparticles were supported on the most promising graphitised CMK-3 and Vulcan using a method based on impregnation and reduction with borohydride, resulting in suitable metal crystallite sizes. The electrocatalytic activity towards the oxidation of carbon monoxide and formic acid were assessed in aqueous sulphuric acid electrolyte for application at the anode of direct formic acid fuel cells (DFAFCs). The best activity results were obtained for the Pd catalyst supported on a graphitised CMK-3.

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“…demonstrated that unsupported Pd and Pd/C catalysts can overcome the CO poisoning effect, thereby yielding high performances in direct formic acid fuel cells (DFAFCs) [6,7].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of thermal treatments on the stability of Pd nanoparticles supported on graphitised ordered mesoporous carbons

Celorrio

Sebastián

Calvillo

et al. 2016

International Journal of Hydrogen Energy

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“…On the anode side of fuel cell, each molecular formic acid is oxidized to provide two electrons. The anodic, catholic and overall reaction is shown in the following equations [29,30] (Figure 1 The theoretical open circuit potential (OCP) for DFAFCs from the Gibbs free energy, equals 1.48 V. OCP for formic acid fuel cell is higher than the direct methanol fuel cell. From the point of dynamics, only with two protons a molecular formic acid could be oxidized, in some cases, it can be done in one step reaction, so the electrochemical polarization is smaller than direct methanol fuel cells.…”

Section: The Mechanism Of the Direct Formic Acid Fuel Cellsmentioning

confidence: 99%

“…Carbon supported Pd catalysts demonstrate good activity along with the potential for more efficient Pd metal utilization and lower metal loadings [2]. Larsen et al [30] have compared the previous result of Pt-based catalysts in DFAFCs, the performance of Pd catalysts are greater. Rice et al, have experimented the behavior of platinum black, platinum-ruthenium and platinumpalladium towards the performance of the DFAFCs as illustrated in Table 1 [38].…”

Section: The Mechanism Of the Direct Formic Acid Fuel Cellsmentioning

confidence: 99%

The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

Uwitonze¹,

Chen²

2017

Chem Sci J

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Detailed investigation of HCOOH electro-oxidation started about five decades ago, with the advent of modern potentiodynamic techniques, driven initially by the purpose of elucidating some of the most interesting and challenging electrode kinetic problems. Many pioneering works that withstood the test of time and the continuous sophistication of surface electrochemistry techniques were published in the 1960s. Stimulated results were obtained, such as: (i) phenomenological interpretation of anodic polarization curves (e.g., Determination of Tafel parameters), HCOOH oxidation on Pd and Pt catalysts; (ii) discovery of the catalytic effect with respect to Pt and Pd for HCCOH oxidation; (iii) investigation of the potential dependent adsorption of HCOOH on Pt and Pd catalysts which are accompanied by a dual pathway mechanism and (iv) formic acid concentration, temperature effects and crossover of nafion membrane.

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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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Unusually active palladium-based catalysts for the electrooxidation of formic acid

Cited by 269 publications

References 11 publications

Influence of thermal treatments on the stability of Pd nanoparticles supported on graphitised ordered mesoporous carbons

Influence of thermal treatments on the stability of Pd nanoparticles supported on graphitised ordered mesoporous carbons

The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

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

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