Methanol electrooxidation on a nickel electrode modified by nickel–dimethylglyoxime complex formed by electrochemical synthesis

Golikand, Ahmad Nozad; Asgari, Mehdi; Maragheh, Mohammad Ghannadi; Shahrokhian, Saeed

doi:10.1016/j.jelechem.2005.11.033

Cited by 117 publications

(62 citation statements)

References 32 publications

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“…There is no apparent binding energy difference in the two Ni 2p spectra, indicating the oxidation states of Ni in the Ni and Ni1Cys5 samples are the same and fall in the binding energy range of NiO, Ni(OH) 2 and NiOOH. 21 The peak around 289 eV in the carbon 1s spectrum of the Ni sample suggests some carbon on the glassy carbon plate is oxidized to carboxylate and/or CO 3 2− has contaminated the sample in the alkaline solution during sample preparation.…”

Section: Resultsmentioning

confidence: 97%

“…According to literature, 17,18 C-O-Ni oxo bridges are formed during this process, so that the catalysts are attached to the electrode surfaces and the pair of redox peaks in the CVs are the Ni(OH) 2 and NiOOH peaks. The redox reaction of Ni could be expressed as:…”

Section: Resultsmentioning

confidence: 99%

“…where F is Faraday's constant, A is the geometric surface area of the glassy carbon electrodes and n is the number of electrons transferred during Ni(OH) 2 to NiOOH, which is assumed to be 1 here. Q is the charge under the NiOOH peak, and the baseline is chosen as shown in Figure S1.…”

Section: Resultsmentioning

confidence: 99%

“…One of the nickel annulene has reached the highest value of 9.7 × 10 −8 mol/cm 2 . 16 We noticed that cysteine can dissolve Ni(OH) 2 in 0.1 M NaOH, so cysteine should have a strong interaction with Ni(OH) 2 . This paper studies the electrodeposition of nickel cysteine in 0.1 M NaOH with different cysteine concentrations.…”

mentioning

confidence: 99%

“…In recent years, there has been extensive research on using nickel based catalysts to electro-oxidize methanol. Planar nickel electrodes show poor catalytic activities, 2 so some researchers have focused on dispersing nickel centers in three dimensional structures to increase methanol oxidation current. Based on this concept, many nickel complexes in alkaline solution have been electrodeposited onto glassy carbon electrode surfaces and the electrochemical properties have been examined.…”

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confidence: 99%

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Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Chen

Giroud

2014

J. Electrochem. Soc.

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Compared to platinum, nickel is an inexpensive catalyst that can oxidize methanol in alkaline media. There is a desire to increase nickel loading during electrodeposition for improved performance. In this paper, a nickel cysteine complex (NiCys) is used as the precursor for electrodeposition on glassy carbon electrode surfaces. After optimization of cysteine concentration, the surface concentration of NiOOH on NiCys electrodes characterized by cyclic voltammetry in 0.1 M NaOH can reach 1.28 (± 0.32) × 10 −7 mol/cm 2 . The large amount of NiOOH on NiCys electrodes provide 5 times the methanol oxidation current compared to Ni electrodes prepared without cysteine as demonstrated by chronoamperometry at 0.7 V vs. Hg/HgO. Atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy have been applied to examine surface morphologies and structures of NiCys and Ni electrodes. The analysis reveals that cysteine adjusts the solubility of Ni(OH) 2 in 0.1 M NaOH, so more uniform and smaller size nanoparticles are electrodeposited on electrode surfaces compared to Ni electrodes. Fuel cells are a promising energy conversion device to convert chemical energy in a fuel to electrical energy. Nickel-based anodic electrocatalysts are cheaper than conventional precious metal based catalysts and can oxidize various fuels e.g. alcohols, carbohydrates, amino acids and alkanes in alkaline media.1 Direct methanol fuel cells are attracting more interest, because methanol has a high theoretical energy density and is easy to handle in transportation and storage. In recent years, there has been extensive research on using nickel based catalysts to electro-oxidize methanol. Planar nickel electrodes show poor catalytic activities, 2 so some researchers have focused on dispersing nickel centers in three dimensional structures to increase methanol oxidation current. Based on this concept, many nickel complexes in alkaline solution have been electrodeposited onto glassy carbon electrode surfaces and the electrochemical properties have been examined. [2][3][4][5][6][7][8][9][10][11][12][13][14] Nickel macrocyclic complexes, such as nickel porphyrin, cyclam, annulene, salen and cyanine, have been studied. These examples show methanol oxidation currents are five to eighty times higher than their nickel control electrodes. 5,15 However, none of these studies provide a thorough description of the three dimensional structure, i.e. how nickel centers are dispersed by these nickel complexes. It is also not discussed as to how these nickel complexes relate to NiOOH (the catalytically active species) in chemical structure. Very few papers present surface morphology images.3,4 Most of these nickel complexes have NiOOH surface concentration in the range of 10 −9 to 10 −8 mol/cm 2 . One of the nickel annulene has reached the highest value of 9.7 × 10 −8 mol/cm 2 . 16 We noticed that cysteine can dissolve Ni(OH) 2 in 0.1 M NaOH, so cysteine should have a strong interac...

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Chen

Giroud

2014

J. Electrochem. Soc.

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Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Nguyen

Pham

Huynh³

et al. 2023

Advanced Sustainable Systems

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With increasing energy demands and environmental issues, renewable energy‐related conversion systems have gained significant attention as a potential substitute for traditional fossil fuel‐based energy technologies. First introduced by S.W.Grove in 1838, fuel cells have been extensively developed into many different types, and direct alcohol fuel cells (DAFCs) are of interest as a potential power source because of their large power density, quick start, simplicity, and nearly zero emission. However, the high cost and poor catalytic efficiency of current catalysts are primary barriers to commercializing DAFCs. Designing advanced nanocatalysts for both anode and cathode electrodes is of crucial importance for practical DAFC development; however, a brief evaluation of current progress in electrocatalyst development for the alcohol oxidation reaction (AOR) and oxygen reduction reaction (ORR) is still very little. Herein, recent advances in fuel cell catalysts, mainly focusing on several most active areas (i.e., Pt‐ and Pt‐free‐based catalysts, metal‐free carbon, carbon‐based nonprecious metal composites) are concisely summarized. Also, challenges and prospects for DAFCs are highlighted to supply a comprehensive view for further designing high‐performance DAFC catalysts.

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Anchored Ni‐dimethylglyoxime complex on Fe₃O₄@SiO₂ core/shell nanoparticles for the clean catalytical synthesis of dicoumarols

Hassanloie

Pesyan

Sheykhaghaei

2019

Applied Organom Chemis

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Ni‐Dimethylglyoxime complex immobilized on functionalized Fe3O4 was synthesized by a post‐grafting way and utilized as a novel, thermally stable, recoverable, and efficient for green synthesis of dicoumarols through reaction of 4‐hydroxycoumarin with various aldehydes in excellent yields and higher rate. Fe3O4@SiO2‐silylcyclopropyl‐dimethylglyoxime‐Ni superparamagnetic nanoparticles (MNPs) were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction, vibrating sample magnetometer, and Brunauer–Emmett–Teller technique. This nanocatalyst could be conveniently recovered via the use of an external magnetic field and reused for subsequent reactions for at least 7 times without any remarkable change and decrease in catalytic activity.

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Methanol electrooxidation on a nickel electrode modified by nickel–dimethylglyoxime complex formed by electrochemical synthesis

Cited by 117 publications

References 32 publications

Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Anchored Ni‐dimethylglyoxime complex on Fe₃O₄@SiO₂ core/shell nanoparticles for the clean catalytical synthesis of dicoumarols

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Methanol electrooxidation on a nickel electrode modified by nickel–dimethylglyoxime complex formed by electrochemical synthesis

Cited by 117 publications

References 32 publications

Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Nickel Cysteine Complexes as Anodic Electrocatalysts for Fuel Cells

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Anchored Ni‐dimethylglyoxime complex on Fe3O4@SiO2 core/shell nanoparticles for the clean catalytical synthesis of dicoumarols

Contact Info

Product

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Anchored Ni‐dimethylglyoxime complex on Fe₃O₄@SiO₂ core/shell nanoparticles for the clean catalytical synthesis of dicoumarols