Absorption of hydrogen in reduced nickel oxide

Visscher, Whm Wil; Barendrecht, E Embrecht

doi:10.1007/bf00726096

Cited by 37 publications

(29 citation statements)

References 12 publications

(13 reference statements)

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“…In general, the magnitude of the area under the anodic and cathodic waves increases with repetitive potential cycling corresponding to the formation of a hydrous oxide deposit on the nickel surface. 177,212,218 It is to be noted that peak A2* disappears with potential multicycling, whereas the cathodic peak doublet C2 and C2* remain even after considerable multicycling, as shown in Fig. 11b.…”

Section: Interfacial Redox Chemistry Of Nickel Based Electrodes In Almentioning

confidence: 80%

“…The voltammetric behaviour of polycrystalline Ni electrodes has been studied by a number of authors including Seghiouer and coworkers, 210 Burke et al, 177,211 Visscher and Barendrecht, 212 de Souza et al, 213 and Simpraga and Conway 214 to name but a few. Typical voltammetric profiles in 1.0 M NaOH for a polycrystalline Ni electrode and a polycrystalline Ni electrode which has been subjected to a repetitive potential cycling regime are presented in Fig.…”

Section: Interfacial Redox Chemistry Of Nickel Based Electrodes In Almentioning

confidence: 99%

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Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

Doyle

Godwin

Brandon

et al. 2013

Phys. Chem. Chem. Phys.

511

565

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This paper presents a review of the redox and electrocatalytic properties of transition metal oxide electrodes, paying particular attention to the oxygen evolution reaction. Metal oxide materials may be prepared using a variety of methods, resulting in a diverse range of redox and electrocatalytic properties. Here we describe the most common synthetic routes and the important factors relevant to their preparation. The redox and electrocatalytic properties of the resulting oxide layers are ascribed to the presence of extended networks of hydrated surface bound oxymetal complexes termed surfaquo groups. This interpretation presents a possible unifying concept in water oxidation catalysis -bridging the fields of heterogeneous electrocatalysis and homogeneous molecular catalysis. In contextOver the past 50 years considerable research efforts have been devoted to the realisation of efficient, economical and renewable energy sources. Metal oxide materials have played a large part in this drive with demonstrated applications at both the research and commercial level. Their use in areas such as batteries, fuel cells and water electrolysis has resulted in the development of materials with a diverse range of structural and chemical properties. In all cases, understanding the fundamental electrochemistry of the material can be invaluable for rational design and optimisation. This review focuses on the redox, charge transport and electrocatalytic properties of transition metal oxide electrodes as they pertain to the electrolytic splitting of water. Particular emphasis is placed on the nature of the active surface which is interpreted in terms of hydrated interlinked oxymetal complexes termed surfaquo groups. In this way, the review seeks to bridge the gap between heterogeneous electrocatalysis and homogeneous molecular catalysis for water oxidation, areas of considerable modern interest and activity.

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Section: Interfacial Redox Chemistry Of Nickel Based Electrodes In Almentioning

confidence: 80%

Section: Interfacial Redox Chemistry Of Nickel Based Electrodes In Almentioning

confidence: 99%

Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

Doyle

Godwin

Brandon

et al. 2013

Phys. Chem. Chem. Phys.

511

565

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“…The peak at ca. 70 mV has been attributed to absorbed hydrogen [34]. This peak is not observed in the ellipsometric scan, so Habs either does not affect the optical density or does not represent a real phase.…”

Section: Precycled Electrodementioning

confidence: 95%

Anodic oxide films of nickel in alkaline electrolyte

Visscher

Barendrecht

1983

Surface Science

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“…With a further increase in E al , the current peak A 1 decreases and moves to the cathodic side, the current peak C 1 disappears, and the charge corresponding to the Ni to a-Ni(OH) 2 transition decreases due to the transition of a-Ni(OH) 2 to irreducible b-Ni(OH) 2 [11,12,14]. According to the Bode diagram [15], a-Ni(OH) 2 is not stable at higher anodic potentials and irreversibly transforms into a crystalline form, b-Ni(OH) 2 .…”

Section: Cyclic Voltammetry and Eqcn Frequency Measurementsmentioning

confidence: 99%

“…Measurements were performed in a borate buffer solution (pH 8.4) from À1.1 V to a selected anodic potential limit E al , with a scan rate 50 mV s À1 . Prior to each measurement and after each cycle the electrode was held at the potential of À1.1 V for 60 s. [11,12]. On the negative going sweep, the current peak C 1 corresponding to a-Ni(OH) 2 reduction is followed by a current increase due to hydrogen adsorption and evolution.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%