Ternary NiFeMn layered double hydroxides as highly-efficient oxygen evolution catalysts

Lu, Zhiyi; Li, Qian; Tian, Yang; Li, Yaping; Sun, Xiaoming; Duan, Xue

doi:10.1039/c5cc08845c

Cited by 287 publications

(183 citation statements)

References 45 publications

(39 reference statements)

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“…Incorporation of a third metal ion has been proposed as a strategy to improve the activity of NiFe-LDH by affecting the conductivity and the structure of the binary catalyst [23,24,59]. Thus, we select Co 2+ as a third metal ion to synthesize ternary NiFeCo-LDH anchoring on porous BiVO4 photoanode (BiVO4/NiFeCo-LDH).…”

Section: Effect Of Ternary Nifeco-ldh On Porous Bivo4 Photoanodementioning

confidence: 99%

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Huang

Xin

et al. 2017

Sci. China Mater.

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The increasing exploration of renewable and clean power sources have driven the development of highly active materials for photoelectrochemical (PEC) water splitting. However, it is still a great challenge to enhance the charge utilization. Herein, we report a facile method to fabricate composite photoanode with porous BiVO4 film as the photon absorber and layered double hydroxide (LDH) nanosheet arrays as the oxygen-evolution cocatalysts (OECs). The as-prepared BiVO4/NiFe-LDH photoanode shows an excellent performance for PEC water splitting benefitting from the synergistic effect of the superior charge separation efficiency facilitated by porous BiVO4 film and the excellent water oxidation activity resulting from LDH nanosheet arrays. A photocurrent density is 4.02 mA cm −2 at 1.23 V vs. the reversible hydrogen electrode (RHE). Furthermore, the O2 evolution rate at the surface of BiVO4/NiFe-LDH photoanode is as high as 29.6 µmol h −1 cm −2 and the high activity for water oxidation is maintained for over 30 h. Impressively, the performance of the as-fabricated composite photoanode for PEC water splitting can be further enhanced through incorporating a certain amount of Co 2+ cation into NiFe-LDH as OEC. The photocurrent density is achieved up to 4.45 mA cm −2 at 1.23 V vs. RHE. This value is the highest yet reported for un-doped BiVO4-based photoanodes so far.

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Section: Effect Of Ternary Nifeco-ldh On Porous Bivo4 Photoanodementioning

confidence: 99%

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Huang

Xin

et al. 2017

Sci. China Mater.

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“…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.…”

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confidence: 99%

“…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.)…”

mentioning

confidence: 99%

“…), layered double hydroxides (LDHs) have been widely investigated in catalysis, 14,15 biology, 16,17 adsorption, 18,19 energy storage and conversion, etc. [20][21][22] Especially, LDH-based materials containing transition metal cations, such as Ni, Fe, Co and Mn, have been widely used as electrochemical catalysts in basic solutions [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.…”

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confidence: 99%

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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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“…It has been found that incorporate another metal element into FeNi LDH, the most active oxygen evolution reaction (OER) catalyst, can promote the electrocatalytic property on OER. 26,27 Although more and more LDH materials were applied in electrochemical catalysis for OER that showed low overpotential and long stability, it's still urgent to develop a facile synthesis method for achieving large scale production of high efficient OER catalysts composed of inexpensive raw material for the purpose of widespread application.…”

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confidence: 99%

Room-Temperature Synthesis FeNiCo Layered Double Hydroxide as an Excellent Electrochemical Water Oxidation Catalyst

Gao

Pan

Long

et al. 2017

J. Electrochem. Soc.

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Layered double hydroxides (LDH) have attracted tremendous attention in a variety of areas, including catalysis, energy storage, drug delivery, etc. Herein, we report a simple coprecipitation method to prepare highly active electrochemical catalysts of FeNiCo LDH at room temperature. In alkaline media, the as-obtained FeNi2Co2 LDH shows superior electrocatalytic activity toward water oxidation with an overpotential of 232 mV at 10 mA/cm2 and a low Tafel slope of 48 mV/dec, comparable to most of the reported noble-metal free OER catalysts. The suitable electronic structures as well as reduced charge transfer resistance that promote the electrons transfer during the OER process are proposed to be the two critical factors that lower the overpotential of the catalytic reaction.

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Ternary NiFeMn layered double hydroxides as highly-efficient oxygen evolution catalysts

Cited by 287 publications

References 45 publications

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Promoting charge carrier utilization by integrating layered double hydroxide nanosheet arrays with porous BiVO4 photoanode for efficient photoelectrochemical water splitting

Ni Nanoparticles Decorated NiFe Layered Double Hydroxide as Bifunctional Electrochemical Catalyst

Room-Temperature Synthesis FeNiCo Layered Double Hydroxide as an Excellent Electrochemical Water Oxidation Catalyst

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