EQCM studies on oxidation of metallic nickel electrode in basic solutions

Grdeń, M.; Klimek, Katarzyna

doi:10.1016/j.jelechem.2005.04.026

Cited by 39 publications

(38 citation statements)

References 80 publications

(134 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ni(OH) 2 also forms electrochemically on Ni electrodes in alkaline media, which has importance for the development of Ni-based electrocatalysts [23,105,179,[184][185][186][187]. Consequently, the surface electrochemistry has been extensively studied using atomic force microscopy [188], ellipsometry [181,[189][190][191], IR spectroscopy [192], Raman spectroscopy [166,193,194], UV-Vis spectroscopy [192,195], voltammetry [179,185,[196][197][198][199][200][201], X-ray scattering [176], XPS [179,202] and gravimetry with an electrochemical quartz crystal microbalance [203,204]. During a forward voltammetric sweep, a surface bilayer of α-Ni(OH) 2 underlaid by NiO x forms initially [179].…”

Section: (D) Chemical Ageingmentioning

confidence: 99%

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

et al. 2015

View full text Add to dashboard Cite

This review article summarizes the last few decades of research on nickel hydroxide, an important material in physics and chemistry, that has many applications in engineering including, significantly, batteries. First, the structures of the two known polymorphs, denoted as α-Ni(OH) 2 and β-Ni(OH) 2 , are described. The various types of disorder, which are frequently present in nickel hydroxide materials, are discussed including hydration, stacking fault disorder, mechanical stresses and the incorporation of ionic impurities. Several related materials are discussed, including intercalated α-derivatives and basic nickel salts. Next, a number of methods to prepare, or synthesize, nickel hydroxides are summarized, including chemical precipitation, electrochemical precipitation, sol-gel synthesis, chemical ageing, hydrothermal and solvothermal synthesis, electrochemical oxidation, microwaveassisted synthesis, and sonochemical methods. Finally, the known physical properties of the nickel hydroxides are reviewed, including their magnetic, vibrational, optical, electrical and mechanical properties. The last section in this paper is intended to serve as a summary of both the potentially useful properties of these materials and the methods for the identification and characterization of 'unknown' nickel hydroxide-based samples.

show abstract

Section: (D) Chemical Ageingmentioning

confidence: 99%

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The electrolyte solution was carefully outgasses, so that there was no dissolved H 2 (g). Presence of dissolved H 2 (g) would significantly modify the CV profiles by shifting them toward different values of j and giving rise to an anodic peak characteristic of the hydrogen oxidation reaction [25,54,56,57]. The cathodic peak overlaps the onset of HER and gives rise to a small cathodic current.…”

Section: Electrochemically Active Surface Area Determinationmentioning

confidence: 99%

“…It is important to emphasize that upon the application of E>0.5 V vs. RHE, α-Ni(OH) 2 undergoes irreversible conversion to β-Ni (OH) 2 . Although it is widely accepted that the surface compound formed in the 0.0≤E≤0.5 V vs. RHE range is α-Ni(OH) 2 , some authors suggested that the formation of α-Ni(OH) 2 is accompanied by the development of NiO [14,[25][26][27][28][29]. In basic aqueous electrolyte solutions, the formation of α-Ni(OH) 2 is reported to proceed simultaneously with its electro-dissolution [13,22,26,27,30,31], but the amount of electro-dissolved Ni was claimed to be insignificant [14,25,[32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Growth of Surface Oxides on Nickel. Part 1: Formation of α-Ni(OH)2 in Relation to the Polarization Potential, Polarization Time, and Temperature

2011

View full text Add to dashboard Cite

Electro-oxidation of Ni(poly) in 0.5 M aqueous KOH solution at various polarization potentials (E p ) up to 0.5 V vs. reversible hydrogen electrode, for polarization times (t p ) up to 2 h, and at 285≤T≤318 K leads to the formation of a thin layer of α-Ni(OH) 2 . Interfacial capacitance measurements show that the Ni(poly) electrode covered with a layer of α-Ni(OH) 2 can be completely reduced back to its metallic state by applying a negativegoing potential scan with a lower potential limit of −0.2 V. An increase of E p , t p , and/or T results in an increase of the thickness of the α-Ni(OH) 2 layer, which, however, never exceeds two monolayers. The electrochemical formation of α-Ni(OH) 2 follows a direct logarithmic growth kinetic law. The results reported in this contribution and their interpretation imply that other oxide growth theories, such as the Langmuir-type adsorption, the point defect model, the electron tunneling, or the nucleation-and-growth model, are not applicable to the growth of α-Ni(OH) 2 . The potentiostatic growth of α-Ni(OH) 2 on Ni(poly) is successfully treated by applying the interfacial place-exchange mechanism and the associated kinetic law.

show abstract

“…The anodic and cathodic peak potentials were at about 0.640 and 0.566 V versus SCE. The difference in anodic and cathodic peak potential (DE p ) was 0.074 V, which is smaller than the DE p (0.104 V) of Ni nanowire electrode and the DE p (0.111 V) of bulk Ni electrode in 1.0 mol/L KOH solution [5], indicating that the transformation between b-Ni(OH) 2 and b-NiOOH has better reversibility.…”

Section: Resultsmentioning

confidence: 78%

“…The metallic Ni is oxidized to Ni(OH) 2 or NiO at negative potentials, then they are oxidized to the oxide or hydroxide of nickel with higher valence at positive potentials. The oxidization of some carbohydrates involved the formation of low valence Ni(OH) 2 from the reduction of NiOOH [5]. Abdel Rahim et al [6] found that only Ni dispersed on graphite shows a catalytic activity towards methanol oxidation but massive Ni does not.…”

Section: Introductionmentioning

confidence: 99%

Preparation of glass carbon electrode modified with nanocrystalline nickel-decorated carbon nanotubes and electrocatalytic oxidation of methanol in alkaline solution

et al. 2008

Front. Chem. China

View full text Add to dashboard Cite

Nanocrystalline nickel with an average diameter of about 16 nm and a face-centered cubic (fcc) structure was uniformly attached to the surface of carbon nanotubes (CNT) by wet chemistry. The sample was characterized by X-ray powder diffraction and transmission electron microscopy (TEM). A glass carbon electrode modified with nickel-modified multi-wall carbon nanotubes (MWCNTs-Ni/GCE) was prepared. The electrochemical behavior of the MWCNTs-Ni/GCE and the electrocatalytic oxidation of methanol at the MWCNTsNi/GCE were investigated by cyclic voltammetry in 1.0 mol/L NaOH solution. The cyclic voltammograms showed that the electron transfer between b-Ni(OH) 2 and b-NiOOH is mainly a diffusion-controlled quasireversible process, and that the electrode has high catalytic activity for the electrooxidation of methanol in alkaline medium, revealing its potential application in alkaline rechargeable batteries and fuel cells.

show abstract

EQCM studies on oxidation of metallic nickel electrode in basic solutions

Cited by 39 publications

References 80 publications

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

Electrochemical Growth of Surface Oxides on Nickel. Part 1: Formation of α-Ni(OH)2 in Relation to the Polarization Potential, Polarization Time, and Temperature

Preparation of glass carbon electrode modified with nanocrystalline nickel-decorated carbon nanotubes and electrocatalytic oxidation of methanol in alkaline solution

Contact Info

Product

Resources

About