Electrochemical modification of nickel surfaces for efficient glycerol electrooxidation

Houache, Mohamed S. E.; Cossar, Emily; Ntais, Spyridon; Baranova, Elena A.

doi:10.1016/j.jpowsour.2017.08.089

Cited by 103 publications

(124 citation statements)

References 57 publications

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“…We will refer to the two latter as the voltammetric electrochemical surface area (VECSA) and the double-layer electrochemical surface area (DECSA), respectively. The surface area evaluated from the voltammetric charge (VECSA, S α−Ni(OH) 2 ) is based on the equation 34 S α−Ni(OH) 2 = Q CV 514 μC cm −2 [6] where Q CV (in μC cm −2 ) is the anodic voltammetric charge evaluated in 0.1 mol dm −3 by integration from −0.9 V through −0.4 V vs Hg/HgO. Prior to the voltammetry the electrodes were polarized at E = −1.3 V vs. Hg/HgO for 5 minutes and then at E = −0.8 V vs. Hg/HgO for 10 min to reduce and eliminate any surface oxides/hydroxides traces.…”

Section: Resultsmentioning

confidence: 99%

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Faid

Barnett

Seland

et al. 2019

J. Electrochem. Soc.

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Ni and Ni-doped with transition metals (TM) such as Fe and Co represent the most suitable electrodes for hydrogen evolution reaction (HER) in alkaline media. Various compositions of co-precipitated Ni 1+x Fe 2−x O 4 and Ni 1+y Co 2−y O 4 nanoparticles were investigated. The intrinsic HER catalytic activity is the same for all the catalysts, which we relate to similar values of the iso-electric point (IEP). However, the mass catalytic activity of the catalysts changes through a modification of the electrochemical surface area. Fractional reaction orders for hydrogen evolution revealed in all catalyst compositions are due to double layer effects and surface acid-base equilibria. Reaction order and Tafel slope of the catalysts are compatible with electrochemical adsorption as the rate-determining step for the HER. Tafel slopes were also evaluated independently from impedance spectroscopy, in good agreement with the polarization curves. Electrodes prepared from catalyst inks containing an anion-exchange ionomer displayed inferior catalytic activity for the HER as compared to electrodes prepared with Nafion in the ink. Chronoamperometry confirmed the sustained superior hydrogen kinetics over time of NiFe 2 O 4 and NiCo 2 O 4 composition over that of NiO. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP F520 Journal of The Electrochemical Society, 166 (8) F519-F533 (2019) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP

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Section: Resultsmentioning

confidence: 99%

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Faid

Barnett

Seland

et al. 2019

J. Electrochem. Soc.

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“…Other alcohols, e. g., ethanol, have been used as promising non‐toxic alternatives with higher energy density compared to methanol (8.01 kW h kg −1 vs. 6.09 kW h kg −1 ), but the difficulty of the C−C bond breaking (for complete ethanol oxidation at low temperature) is a severe drawback . In this context, polyols, e. g., glycerol, seem to be promising alternatives owing to its unique features such as low flammability and volatility, non‐toxicity, low crossover flux through the membrane and bio‐renewability . Additionally, from the economic and environmental point of view, glycerol is produced in large amounts as a byproduct during the biodiesel production process .…”

Section: Introductionmentioning

confidence: 99%

“…[14] In this context, polyols, e. g., glycerol, seem to be promising alternatives owing to its unique features such as low flammability and volatility, nontoxicity, low crossover flux through the membrane and biorenewability. [15][16][17][18][19] Additionally, from the economic and environmental point of view, glycerol is produced in large amounts as a byproduct during the biodiesel production process. [18] Furthermore, during the glycerol oxidation reaction (GOR), many intermediates can be formed such as glyceric acid and glyceraldehyde which have potential commercial importance.…”

Section: Introductionmentioning

confidence: 99%

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

et al. 2020

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Herein, Cu/Cu2O foams with dendritic‐like structures were electrodeposited atop a smooth Cu electrode by using a dynamic hydrogen bubbles technique, and they were used as efficient electrocatalysts for glycerol electrooxidation. The morphology, structure, and composition of the as‐prepared Cu/Cu2O foams were tuned by using additives (e. g. KCl and NiCl2) in the copper deposition bath to maximize their electrocatalytic performance towards glycerol electrooxidation. The as‐synthesized Cu/Cu2O foams showed superior electrocatalytic activity towards the glycerol oxidation reaction, as demonstrated by the significant negative shift in the onset potential (ca. 400 mV) together with an oxidation current that is up to six times higher, compared to the Cu/Cu2O non‐porous film with the same loading. The performance of these foams was further improved by introducing optimum amounts of either Ni2+ and/or Cl− ions. These additives resulted in a significant change in the structure and shape of the electrodeposited Cu/Cu2O textures with a concurrent increase in their roughness. Material and electrochemical characterization (e. g. SEM, XRD, XPS, LSV and CV) techniques were used to link the observed enhancements to the morphology, composition, and structure of the as‐synthesized Cu/Cu2O foam materials.

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“…The glycerol oxidation on Ni in alkaline media was reported in some works [96][97][98][99][100][101], starting from different Ni structures, such as electrosynthesized nanocrystalline hexagonal close-packed (hcp) nickel [96], sinusoidal-wave electrochemically treated Ni surface [97], a Ni nanoparticle modified boron doped diamond (BDD) electrode [98], a nickel ion implanted-modified indium tin oxide electrode [99], pulse electrodeposited Ni with two structure directing agents, that is, citric acid (CA) and tetrabutylammonium bromide (TBr) [100] and Ni(OH) 2 nanoparticles encapsulated with poly[Ni(salen) [101]. All these Ni catalysts presented a GOR activity higher than the conventional Ni electrode, however, the performance of glycerol oxidation was too poor to be used for commercial applications.…”

Section: Non-precious Metal Catalystsmentioning

confidence: 91%

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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Electrochemical modification of nickel surfaces for efficient glycerol electrooxidation

Cited by 103 publications

References 57 publications

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

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

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Electrochemical modification of nickel surfaces for efficient glycerol electrooxidation

Cited by 103 publications

References 57 publications

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu2O Foams for Efficient Glycerol Electro‐Oxidation

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

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Product

Resources

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Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation