How do Bi-modified palladium nanoparticles work towards glycerol electrooxidation? An in situ FTIR study

Zalineeva, Anna; Baranton, Stève; Coutanceau, Christophe

doi:10.1016/j.electacta.2015.07.073

Cited by 69 publications

(75 citation statements)

References 44 publications

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“…For potential higher than 0.9 V vs. RHE Pt suffers strong deactivation, due to the formation of an inhibiting surface oxide [10,17,18]. Glycerol oxidation on Pd lead to a selectivity towards GALD and GLA at low potentials, and then towards HPA, dicarboxylates and products derived by C-C bond cleavage (C2 and C1 compounds) at higher potentials [18,26]. It has to be denoted that the structure and morphology of the catalysts can play a role for the selectivity: GLA and TA were obtained on Pd/C, and HPA on Pd nanofoam [2].…”

Section: Pure Pt Pd and Au Catalysts And Binary Ptau And Pdau Catalystsmentioning

confidence: 99%

“…The increase of the mass activity is due to the enhancement of the specific activity and/or the electrochemically active surface area. The comparison of the GOR activity of binary/ternary catalysts with that of the respective pure metal catalysts and their selectivity are reported in Table 2 [13,18,24,26,28,33,44,50,. Generally, the addition of a second/third metal improves the GOR activity, and an optimum catalyst composition is observed.…”

Section: Pt-and Pd-and Au-based Binary/ternary Catalystsmentioning

confidence: 99%

“…Indeed, in acid medium Bi blocks the pathway for primary oxidation and also provides a specific Pt-Bi surface site for secondary alcohol oxidation, but in alkaline medium the OH − presence suppress the blocking of the pathway for primary oxidation, giving rise to the formation of GALD and GLA. Conversely, on PdBi a selectivity for CO 2 and carbonate production, and formation of HPA was observed in alkaline media [26]. Couteanceau et al [58] compared GLY oxidation on PdBi and PtBi in alkaline media.…”

Section: Pt-and Pd-and Au-based Binary/ternary Catalystsmentioning

confidence: 99%

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Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Antolini¹

2019

Catalysts

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The low price, highly active triol structure, high volumetric energy density, simple storage and environment-friendly properties make glycerol a promising fuel for an alkaline direct alcohol fuel cell (ADAFC). Unlike other ADAFCs, alkaline direct glycerol fuel cells (ADGFCs) can be used either to generate only energy (the common use of fuel cells) or to produce both energy and valuable chemicals. This work presents an overview of catalysts for glycerol oxidation in alkaline media, and their use in ADGFCs. A particular attention was paid to binary and ternary catalysts able both to increase the selectivity to valuable C3 glycerol oxidation products, reducing the C-C bond cleavage, and simultaneously to enhance glycerol conversion.

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Section: Pure Pt Pd and Au Catalysts And Binary Ptau And Pdau Catalystsmentioning

confidence: 99%

Section: Pt-and Pd-and Au-based Binary/ternary Catalystsmentioning

confidence: 99%

Section: Pt-and Pd-and Au-based Binary/ternary Catalystsmentioning

confidence: 99%

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Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Antolini¹

2019

Catalysts

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“…Furthermore, when glycerol is used for fuel cell, the reversible energy efficiency of the cell is 0.993 at 25 °C under standard conditions when glycerol is completely oxidized, while for H 2 /O 2 fuel cell, it is 0.83. In order to avoid intermediates of glycerol electro‐oxidation, such as aldehydes, ketones, acids and carbon monoxide (CO), these would not only block the surface active sites and minish the catalytic efficiency of electrocatalyst but also greatly reduce the efficiency of energy conversion, therefore, the reasonable design of high‐performance (activity and durability) electrocatalysts to achieve 14‐electron oxidation of glycerol (i.e., CH 2 OH‐CHOH‐CH 2 OH + 20OH − → 3CO 3 2− + 14H 2 O + 14e − ) is crucial for final commercialization of direct glycerol fuel cell (DGFC).…”

Section: Introductionmentioning

confidence: 99%

Ultrasmall Pd‐Cu‐Pt Trimetallic Twin Icosahedrons Boost the Electrocatalytic Performance of Glycerol Oxidation at the Operating Temperature of Fuel Cells

Yang

Yuan

et al. 2020

Adv Funct Materials

108

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Recently, in order to improve the energy conversion efficiency of direct polyol fuel cells, the engineering of effective Pd‐ and/or Pt‐based electrocatalysts to rupture CC bonds has received increasing attention. Here, an example is shown to synthesize highly uniform sub‐10 nm Pd‐Cu‐Pt twin icosahedrons by controlling the nucleation phase. Because of the synergies of the electronic effect, synergistic effect, geometric effect, and abundant surface active sites originating from the formation of near surface alloy and special icosahedral shape, the Pd‐Cu‐Pt twin icosahedrons exhibit excellent electrocatalytic performance in glycerol electrocatalysis at the operating temperature of direct alcohol fuel cells (70 °C) in KOH electrolyte. The Pd50.2Cu38.4Pt11.4 icosahedrons show mass activities of 9.7 A mg−1Pd+Pt and 13.7 A mg−1Pd. Furthermore, the Pd50.2Cu38.4Pt11.4 icosahedrons demonstrate long‐term durability in current–time test for 36 000 s and high in situ anti‐CO poisoning performance. In addition, the introduction of CO can enhance electro‐oxidation endurance on Pd50.2Cu38.4Pt11.4 icosahedrons, and the peak mass activity can reach to 14.4 A mg−1Pd+Pt. The in situ Fourier transform infrared spectroscopy spectra indicate that the Pd50.2Cu38.4Pt11.4 icosahedrons possess a high capacity to break CC bonds and may efficiently convert glycerol into CO2, thus improving the utilization efficiency of energy‐containing molecule glycerol.

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“…Pd surfaces produce glyceraldehyde, glyceric acid, mesoxalic acid, and tartronic acid. Furthermore, the bimetallic mixture of Pd with Bi (PdBi), directs the reaction towards glyceraldehyde and dihydroxyacetone . The electro‐oxidation of glycerol has been investigated by combining voltammetry with HPLC online.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Promotion of Pt Nanoparticles by Incorporation of Ni(OH)₂ for Glycerol Electro‐Oxidation: Analysis of Activity and Reaction Pathway

Velázquez-Hernández¹,

Guzmán

Guerra‒Balcázar

et al. 2018

ChemNanoMat

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In this work, the effect of PtÀNi(OH) 2 nanoparticles on the activity and reaction pathway of glycerol oxidation was studied. For this purpose, small Pt (4 AE 0.2 nm) and PtÀNi(OH) 2 nanoparticles (4.7 AE 0.4 nm) supported on Vulcan carbon were synthesized. Ni(OH) 2 were found in the vicinity of Pt modifying the lattice parameter, inter-planar distance and binding energy of Pt. Electrochemical evaluation indicated that PtÀNi(OH) 2 /C had better electrocatalytic activity than Pt/C offering a higher current density (almost 45 mA mg À1 ), and lower onset (À0.3 V) and oxidation peak potentials (0.04 V). The improved activity was associated to the OH groups found in the vicinity of Pt active sites, facilitating the charge transfer due to a bifunctional mechanism. The in situ evaluation confirmed that the incorporation of Ni(OH) 2 led to higher electron transfer due to short-chain byproducts such as glycolate, mesoxalate and formate, which were found at the oxidation peak potential.[a] I. Scheme 1. a-c) Reported cell configurations for in situ analysis. The proposed cell configuration is illustrated in (d).

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How do Bi-modified palladium nanoparticles work towards glycerol electrooxidation? An in situ FTIR study

Cited by 69 publications

References 44 publications

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Ultrasmall Pd‐Cu‐Pt Trimetallic Twin Icosahedrons Boost the Electrocatalytic Performance of Glycerol Oxidation at the Operating Temperature of Fuel Cells

Electrocatalytic Promotion of Pt Nanoparticles by Incorporation of Ni(OH)₂ for Glycerol Electro‐Oxidation: Analysis of Activity and Reaction Pathway

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How do Bi-modified palladium nanoparticles work towards glycerol electrooxidation? An in situ FTIR study

Cited by 69 publications

References 44 publications

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Ultrasmall Pd‐Cu‐Pt Trimetallic Twin Icosahedrons Boost the Electrocatalytic Performance of Glycerol Oxidation at the Operating Temperature of Fuel Cells

Electrocatalytic Promotion of Pt Nanoparticles by Incorporation of Ni(OH)2 for Glycerol Electro‐Oxidation: Analysis of Activity and Reaction Pathway

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Electrocatalytic Promotion of Pt Nanoparticles by Incorporation of Ni(OH)₂ for Glycerol Electro‐Oxidation: Analysis of Activity and Reaction Pathway