Cost effective and energy efficient catalytic support of Co and Ni in Pd matrix toward ethanol oxidation reaction: Product analysis and mechanistic interpretation

Mondal, Anup; De, Abhishek; Datta, Jayati

doi:10.1016/j.apcata.2018.05.015

Cited by 16 publications

(16 citation statements)

References 37 publications

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“…Direct ethanol fuel cells (DEFCs), as a promising alternative new resource, have received comprehensive attention over the past few decades. − It is mainly owing to the fact that as a fuel ethanol possesses high energy density, low toxicity, abundant sources from biomass, and excellent compatibility with the existing fuel infrastructure. , However, the ethanol electrooxidation reaction (EOR) serving as the anode reaction in DEFCs is complex and constrained with sluggish reaction kinetics due to difficulty in cleavage of the C–C bond and ultimately poor poison tolerance. − And DEFCs are far from the ultimate commercialization to date. Therefore, the development of a stringent EOR catalyst with high activity and forceful stability is an urgent demand to speed up the commercialization of DEFCs.…”

Section: Introductionmentioning

confidence: 99%

“…1−3 It is mainly owing to the fact that as a fuel ethanol possesses high energy density, low toxicity, abundant sources from biomass, and excellent compatibility with the existing fuel infrastructure. 4,5 However, the ethanol electrooxidation reaction (EOR) serving as the anode reaction in DEFCs is complex and constrained with sluggish reaction kinetics due to difficulty in cleavage of the C−C bond and ultimately poor poison tolerance. 6−9 And DEFCs are far from the ultimate commercialization to date.…”

Section: ■ Introductionmentioning

confidence: 99%

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Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Yang

Feng

et al. 2019

ACS Sustainable Chem. Eng.

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A new electrocatalyst (denoted as Pd-PdO x /GS-NH2) was fabricated by anchoring Pd nanoparticles with surface enrichment of palladium oxide species (PdO x , including palladium oxides and palladium hydrous oxides) on the aniline-functionalized graphene (GS-NH2) in this work. The GS-NH2 with tunable contents of aniline groups was prepared by a diazo reaction under facile reaction conditions. Then, the surface-clean Pd nanoparticles were decorated on the surface of GS-NH2 by a facile and nonsurfactant approach. Afterward, the palladium oxide species was introduced on the surface of Pd nanoparticles by oxidation treatment in a short period of time. As a catalyst toward the ethanol electrooxidation reaction (EOR), Pd-PdO x /GS-NH2 displays the introduction of appropriate aniline groups and an oxidation treatment with a codependent electrochemical behavior of EOR, mainly owing to the synergy of aniline groups and PdO x . The introduction of aniline groups on the surface of graphene benefits the formation of small size and uniform distribution for nanoparticles and suppresses the dissolution of Pd during electrochemical tests, due to the strong interaction between aniline groups and nanoparticles. However, the excess contents of aniline groups can reduce electrical conductivity of the catalysts, and the optimal mass ratio of 1,4-diaminobenzene to graphene is 1:3. The generated PdO x can strikingly facilitate the removal of COads-like intermediates and elimination of poisoning species during the EOR process, thereby reducing the degradation rate of the catalyst. Therefore, the Pd-PdO x /GS-NH2 possesses superb EOR performance with robust durability and is a kind of great potential anode catalyst for direct ethanol fuel cells. This work also affords a new thought for rationally designing high-performance catalysts.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Yang

Feng

et al. 2019

ACS Sustainable Chem. Eng.

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“…The energy produced from a direct ethanol fuel cell (DEFC) is theoretically higher than the novel direct methanol fuel cell (DMFC). − However, ethanol being a C2 molecule, its electrocatalysis is constrained with sluggish oxidation kinetics because of difficulty in C–C bond cleavage and ultimately poor poison tolerance . Further, researchers have taken efforts to fabricate highly efficient catalysts that enhance the functional characteristics in terms of electronic structure and bifunctionality using a multimetallic framework …”

Section: Introductionmentioning

confidence: 99%

Synergetic Effect of Ni-Substituted Pd₂Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

Rajamani

Ashly

Dheer

et al. 2019

ACS Appl. Energy Mater.

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Development of highly active and stable low-cost Pt-free catalysts for ethanol electrooxidation (EOR) in alkaline medium has drawn a lot of attention in recent years. Palladium-based catalysts are on the forefront of this research. Pd 2 Ge, previously developed by our group, is a highly active and stable catalyst for EOR because of its ordered structure and the presence of Ge. In this work, we used it as a platform to further enhance its efficiency by Ni substitution (Pd 2−x Ni x Ge), which shifts the d-band center of the catalysts toward the Fermi level with the increasing binding energy toward the adsorbate. Stronger interaction between the Ni, Pd, and Ge atoms leads to stronger adsorption of −OH intermediates (−436 kJ/mol) and weaker adsorption of −CH 3 CO (−220 kJ/mol). As a result, this catalyst exhibits 3.8 times higher mass activity and 70 mV lower onset potential than pristine Pd 2 Ge for EOR in alkaline media.

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“…Mondal et al fabricated PdCoNi/C by ethylene glycol reduction method. They described that the PdCoNi/C particles demonstrated higher EOR activity than Pd/C catalysts …”

Section: Introductionmentioning

confidence: 99%

“…They described that the PdCoNi/C particles demonstrated higher EOR activity than Pd/C catalysts. 11 The metal oxide-supported Pd/C could affect the catalytic performance remarkably, 12,13 such as the Pd-NiO/C electrocatalyst acted better for EOR than the Pd/C electrocatalyst in alkaline media. [14][15][16][17] Thus, MoO 2 used as a novel co-catalyst was prepared to promote Pd/C catalyst.…”

Section: Introductionmentioning

confidence: 99%

One‐pot synthesis of Pd‐MoO ₂ /C by microwave sintering as an efficient electrocatalyst for ethanol oxidation reaction

et al. 2019

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Summary The composite catalysts of Pd‐MoO2/C for ethanol oxidation reaction (EOR) were prepared by microwave sintering. MoO3 was thermally reduced to MoO2 by carbon black in the preparing process of the Pd‐MoO2/C material. The TEM analysis showed that Pd‐MoO2 was well polymerized. Chronoamperometric, cyclic voltammetry, and electrochemical impedance spectra methods were applied to reveal the performance for EOR at room temperature. The Pd‐MoO2/C electrode exhibited considerable high activity and stability. MoO2 as a co‐catalyst significantly improved the catalytic activity of Pd‐MoO2/C for EOR.

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Cost effective and energy efficient catalytic support of Co and Ni in Pd matrix toward ethanol oxidation reaction: Product analysis and mechanistic interpretation

Cited by 16 publications

References 37 publications

Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Synergetic Effect of Ni-Substituted Pd₂Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

One‐pot synthesis of Pd‐MoO ₂ /C by microwave sintering as an efficient electrocatalyst for ethanol oxidation reaction

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Cost effective and energy efficient catalytic support of Co and Ni in Pd matrix toward ethanol oxidation reaction: Product analysis and mechanistic interpretation

Cited by 16 publications

References 37 publications

Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Palladium Nanoparticles with Surface Enrichment of Palladium Oxide Species Immobilized on the Aniline-Functionalized Graphene As an Advanced Electrocatalyst of Ethanol Oxidation

Synergetic Effect of Ni-Substituted Pd2Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

One‐pot synthesis of Pd‐MoO 2 /C by microwave sintering as an efficient electrocatalyst for ethanol oxidation reaction

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Product

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Synergetic Effect of Ni-Substituted Pd₂Ge Ordered Intermetallic Nanocomposites for Efficient Electrooxidation of Ethanol in Alkaline Media

One‐pot synthesis of Pd‐MoO ₂ /C by microwave sintering as an efficient electrocatalyst for ethanol oxidation reaction