Exfoliation of layered double hydroxides for enhanced oxygen evolution catalysis

Song, Fang; Hu, Xile

doi:10.1038/ncomms5477

Cited by 2,080 publications

(1,623 citation statements)

References 40 publications

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“…Such result indicated highly efficient electron transfer between the crystalline CoP and the amorphous CoOx nanoclusters. Third, literature reported that amorphous metal oxide sample has higher amount of randomly oriented bonds and higher structural flexibility relative to its crystalline counterpart, which translates to the formation of higher amount of surface unsaturated sites for facile reactant adsorption 9. In such metal phosphide, the highly electronegative P atoms can draw electron from metal atoms and act as proton carrier, thus contributing towards enhanced electrocatalytic activity 10.…”

Section: Resultsmentioning

confidence: 99%

Bifunctionality from Synergy: CoP Nanoparticles Embedded in Amorphous CoOx Nanoplates with Heterostructures for Highly Efficient Water Electrolysis

Zhong

et al. 2018

Advanced Science

146

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Hydrogen production from renewable electricity relies upon the development of an efficient alkaline water electrolysis device and, ultimately, upon the availability of low cost and stable electrocatalysts that can promote oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Normally, different electrocatalysts are applied for HER and OER because of their different reaction intermediates and mechanisms. Here, the synthesis of a heterostructured CoP@a‐CoOx plate, which constitutes the embedded crystalline cobalt phosphide (CoP) nanoclusters and amorphous cobalt oxides (CoOx) nanoplates matrix, via a combined solvothermal and low temperature phosphidation route is reported. Due to the presence of synergistic effect between CoP nanoclusters and amorphous CoOx nanoplates in the catalyst, created from the strong nanointerfaces electronic interactions between CoP and CoOx phases in its heterostructure, this composite displays very high OER activity in addition to favorable HER activity that is comparable to the performance of the IrO2 OER benchmark and approached that of the Pt/C HER benchmark. More importantly, an efficient and stable alkaline water electrolysis operation is achieved using CoP@a‐CoOx plate as both cathode and anode as evidenced by the obtainment of a relatively low potential of 1.660 V at a 10 mA cm−2 current density and its marginal increase above 1.660 V over 30 h continuous operation.

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Section: Resultsmentioning

confidence: 99%

Bifunctionality from Synergy: CoP Nanoparticles Embedded in Amorphous CoOx Nanoplates with Heterostructures for Highly Efficient Water Electrolysis

Zhong

et al. 2018

Advanced Science

146

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“…Currently, transition‐metal (Fe, Co, Ni, Mn, and Mo)‐based catalysts including metal oxides,23, 24, 25, 26, 27, 28, 29, 30 hydroxides,31, 32, 33, 34, 35 phosphides,36, 37, 38, 39, 40, 41, 42 sulfides,43, 44, 45, 46, 47, 48 selenides,49, 50, 51, 52, 53, 54 and nitrides55, 56, 57, 58, 59, 60, 61, 62 have been highlighted as the most promising candidates of OER and HER electrocatalysts. Especially, layered double hydroxides (LDHs)63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85 and their derivatives (metal hydroxides, oxyhydroxides, oxides, bimetal nitrides, phosphides, sulfides, and selenides)86, 87, 88, 89, 90, 91, 92…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Layered Double Hydroxides and Their Derivatives for Electrocatalytic Water Splitting

et al. 2018

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Layered double hydroxide (LDH)‐based materials have attracted widespread attention in various applications due to their unique layered structure with high specific surface area and unique electron distribution, resulting in a good electrocatalytic performance. Moreover, the existence of multiple metal cations invests a flexible tunability in the host layers; the unique intercalation characteristics lead to flexible ion exchange and exfoliation. Thus, their electrocatalytic performance can be tuned by regulating the morphology, composition, intercalation ion, and exfoliation. However, the poor conductivity limits their electrocatalytic performance, which therefore has motivated researchers to combine them with conductive materials to improve their electrocatalytic performance. Another factor hampering their electrocatalytic activity is their large lateral size and the bulk thickness of LDHs. Introducing defects and tuning electronic structure in LDH‐based materials are considered to be effective strategies to increase the number of active sites and enhance their intrinsic activity. Given the unique advantages of LDH‐based materials, their derivatives have been also used as advanced electrocatalysts for water splitting. Here, recent progress on LDHs and their derivatives as advanced electrocatalysts for water splitting is summarized, current strategies for their designing are proposed, and significant challenges and perspectives of LDHs are discussed.

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“…The oxometallate mainly includes Ca 2 Nb 3 O 10 , Ba 5 Nb 4 O 15 , SnNb 2 O 6 , K 4 Nb 6 O 17 , SrNb 2 O 6 , HNbWO 6 , Bi 2 WO 6 , Bi 2 MoO 6 , and BiVO 4 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43. The hydroxides can be classified as single metal hydroxides (e.g., Ni(OH) 2 ) and layered double hydroxides (LDHs) including CoCo LDHs, NiCo LDHs, NiFe LDHs, Ni 0.75 V 0.25 LDHs, CoMn LDHs, CoFe LDHs, NiCoFe LDHs, ZnAl LDHs, CuCr LDHs, and MgAl LDHs 44, 45, 46, 47, 48, 49, 50, 51, 52, 53. In addition, the MOFs with the tuned metal centers can also serve as effective catalysts, such as NiCo MOFs,54 NiFe‐MOFs 55…”

Section: Synthesis Of Atomically Thin 2d Multinary Photo Electrocatamentioning

confidence: 99%

Atomically Thin 2D Multinary Nanosheets for Energy‐Related Photo, Electrocatalysis

Xiong

2018

Advanced Science

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The severe energy crisis and environmental issues have led to an increase in research on the development of sustainable energy. Atomically thin 2D multinary nanosheets with tunable components show advantages for producing sustainable energy via photo, electrocatalysis processes. Here, recent progress of atomically thin 2D multinary nanosheets from the design, synthesis, tuning, and sustainable energy production via photo, electrocatalysis processes is summarized. The regulating strategies such as alloying, doping, vacancy engineering, pores construction, surface modification, and heterojunction are summarized, focusing on how to optimize the catalytic performance of atomically thin 2D multinary nanosheets. In addition, advancements in versatile energy‐related photo, electrocatalytic applications in the areas of oxygen evolution, oxygen reduction, hydrogen evolution, CO2 reduction, and nitrogen fixation are discussed. Finally, existing challenges and future research directions in this promising field are presented.

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Exfoliation of layered double hydroxides for enhanced oxygen evolution catalysis

Cited by 2,080 publications

References 40 publications

Bifunctionality from Synergy: CoP Nanoparticles Embedded in Amorphous CoOx Nanoplates with Heterostructures for Highly Efficient Water Electrolysis

Bifunctionality from Synergy: CoP Nanoparticles Embedded in Amorphous CoOx Nanoplates with Heterostructures for Highly Efficient Water Electrolysis

Recent Progress on Layered Double Hydroxides and Their Derivatives for Electrocatalytic Water Splitting

Atomically Thin 2D Multinary Nanosheets for Energy‐Related Photo, Electrocatalysis

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