Nickel hydroxide as a matrix for unusual valencies: the electrochemical behaviour of metal(III)-ion-substituted nickel hydroxides of the pyroaurite type

Axmann, Peter; Glemser, Oskar

doi:10.1016/s0925-8388(96)02479-6

Cited by 45 publications

(66 citation statements)

References 22 publications

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“…the formation of NiFe LDH. 29,30 Notably, no distinct difference is observed on the XRD patterns of Ni NP/NiFe LDH and NiFe LDH, suggesting that the Ni nanoparticle formation has no influence on the crystal structure of NiFe LDH. The detail information of the crystal structures for NiFe LDH, Ni(OH) 2 and Ni nanoparticle are shown as Table S1.…”

Section: Fig 1 (As Well Asmentioning

confidence: 98%

Ni Nanoparticles Decorated NiFe Layered Double Hydroxide as Bifunctional Electrochemical Catalyst

Gao

Long

Han

et al. 2017

J. Electrochem. Soc.

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Reducing overpotential and increasing current density remain a great challenge for promoting the application of transition metalsbased layered double hydroxides (LDHs). Herein, Ni nanoparticles (∼10 nm) decorated NiFe LDH ultrathin (thickness: ∼2 nm) nanosheets (Ni NP/NiFe LDH) were successfully synthesized which exhibited advanced electrocatalytic activity and long-term stability on both oxygen evolution reaction (OER) and urea oxidation reaction (UOR). The onset potentials for OER and UOR are 1.50 V and 1.34 V, respectively, both are lower than NiFe LDH under the same conditions. Moreover, the peak current density of UOR was 300 mA/cm 2 , which is much larger than reported precious-metal free UOR catalysts. The excellent catalytic performance of Ni NP/NiFe LDH composite for OER and UOR is proposed to result from the abundant exposed active sites, small charge transfer resistance, and the synergistic effects between NiFe LDH and anchored Ni nanoparticles. This work provides inspiring ideas and helpful guidelines in design of low-cost but highly efficient electrochemical catalysts. The global energy crisis and environmental contamination have prompted intense research into the development of sustainable energy conversion and storage systems.1-10 Water splitting and direct urea fuel cell (DUFC) as promising approaches to produce clean energy recyclable, have been widely investigated recently. Nevertheless, oxygen evolution reaction (OER: 2H 2 O === O 2 + 4H + + 4e − ) suffers from a sluggish kinetics owing to a 4e-transfer process, which is frequently an obstacle to the whole water splitting. Same as OER, urea oxidation reaction (UOR: CO(NH 2 ) 2 + H 2 O === N 2 + 3H 2 + CO 2 ) is also under a multistep proton-coupled electron transfer process, which remains to be a great challenge for DUFC. As a consequence, the sluggish kinetics of OER and UOR lead to considerable overpotential and decrease the efficiency of energy conversion and storage. To achieve efficient energy conversion, much effort has been devoted to the research for robust yet stable electrochemical catalysts with reduced overpotentials. Precious metal based catalysts have shown significant electrocatalytic properties, 11-13 but their high cost and scarcity hamper the commercialization of the technique. Therefore, developing functional nanomaterials composed of cost-effective and abundant elements are on great demand.Owing to the unique physicochemical properties (e.g. tunable metal species/ratios, and exchangeable interlayer spacings, etc.), layered double hydroxides (LDHs) [23][24][25][26][27] and among which, NiFe LDH showed the best performance.28 Nevertheless, reducing the overpotential and increasing the current density remain under intensive pursuit for promoting the application of NiFe LDH. For example, the introduction of conductive materials (graphene, carbon nanotube, etc.) into LDH systems can improve the conductivity of the catalysts 21,22 and hence further enhance their catalytic performance. Herein, we report a bifunctional catalyst ...

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Section: Fig 1 (As Well Asmentioning

confidence: 98%

Ni Nanoparticles Decorated NiFe Layered Double Hydroxide as Bifunctional Electrochemical Catalyst

Gao

Long

Han

et al. 2017

J. Electrochem. Soc.

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“…As the peak at ~3.10 Å is relatively weak we find that this interaction can also be represented as a Cr-Cr correlation at 3.44 (5) There has been a number of studies designed to understand the local atomic and electronic structure of iron and other metal ions incorporated into α-Ni(OH) 2 [23][24][25][26][27][28][29]. For brevity, we omit discussion of previous works here.…”

Section: Incorporation Of Cerium Into Nickel Oxide Filmsmentioning

confidence: 97%

``In-situ'' spectro-electrochemical studies of radionuclide-contaminated surface films on metals

Melendres¹,

Mini²,

Mansour³

2000

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“…Under the circumstances, nickel-based LDHs are suggested to be the electrode materials for alkaline secondary battery in order to increase configurational stability of α-Ni(OH)2. The Ni 2+ in Ni(OH)2 host layer are partly substituted by metal ion like Al 3+ [229][230][231][232], Co 3+ [233,234], Fe 3+ [235,236], Zn 2+ [237,238], Mn 3+ [236,239], or Y 3+ [240], in the nickel-based LDHs. Among these fungible metal ion, Al 3+ is thought to be the best candidate for its good electrochemical suitability [230].…”

Section: Micro/nanostructured Al-based Materials For Nickel-metal Hydmentioning

confidence: 99%

Aluminum-based materials for advanced battery systems

Qiu

Zhao

et al. 2017

Sci. China Mater.

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There has been increasing interest in developing micro/nanostructured aluminum-based materials for sustainable, dependable and high-efficiency electrochemical energy storage. This review chiefly discusses the aluminum-based electrode materials mainly including Al2O3, AlF3, AlPO4, Al(OH)3, as well as the composites (carbons, silicons, metals and transition metal oxides) for lithium-ion batteries, the development of aluminum-ion batteries, and nickel-metal hydride alkaline secondary batteries, which summarizes the methodologies, related charge-storage mechanisms, the relationship between nanostructures and electrochemical properties found in recent years, latest research achievements and their potential applications. In addition, we raise the relevant challenges in recently developed electrode materials and put forward new ideas for further development of micro/nanostructured aluminum-based materials in advanced battery systems.

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Nickel hydroxide as a matrix for unusual valencies: the electrochemical behaviour of metal(III)-ion-substituted nickel hydroxides of the pyroaurite type

Cited by 45 publications

References 22 publications

Ni Nanoparticles Decorated NiFe Layered Double Hydroxide as Bifunctional Electrochemical Catalyst

Ni Nanoparticles Decorated NiFe Layered Double Hydroxide as Bifunctional Electrochemical Catalyst

``In-situ'' spectro-electrochemical studies of radionuclide-contaminated surface films on metals

Aluminum-based materials for advanced battery systems

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