2017
DOI: 10.1002/chem.201702745
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Facilitating Active Species Generation by Amorphous NiFe‐Bi Layer Formation on NiFe‐LDH Nanoarray for Efficient Electrocatalytic Oxygen Evolution at Alkaline pH

Abstract: Searching for a simple and fast strategy to effectively enhance the oxygen evolution reaction (OER) performance of non-noble-metal electrocatalysts in alkaline media remains a significant challenge. Herein, the OER activity of NiFe-LDH nanoarray on carbon cloth (NiFe-LDH/CC) in alkaline media is shown to be greatly boosted by an amorphous NiFe-Borate (NiFe-B ) layer formation on NiFe-layered double hydroxide (NiFe-LDH) surface. Such a NiFe-LDH@NiFe-B /CC catalyst electrode only needs an overpotential of 294 mV… Show more

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Cited by 71 publications
(46 citation statements)
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“…Considering that all the three samples (FeCo(Mn)−O/NF, FeCoMn/NF and FeCo−O/NF) were prepared from the analogous procedures, the incorporation of Mn species has significantly tuned the crystal phase of the resulting product, inducing crystalline‐to‐amorphous structural conversion. The amorphous FeCo(Mn)−O/NF can potentially decrease the grain boundaries resistance and maximize the exposure of accessible active sites …”
Section: Figurementioning
confidence: 99%
See 1 more Smart Citation
“…Considering that all the three samples (FeCo(Mn)−O/NF, FeCoMn/NF and FeCo−O/NF) were prepared from the analogous procedures, the incorporation of Mn species has significantly tuned the crystal phase of the resulting product, inducing crystalline‐to‐amorphous structural conversion. The amorphous FeCo(Mn)−O/NF can potentially decrease the grain boundaries resistance and maximize the exposure of accessible active sites …”
Section: Figurementioning
confidence: 99%
“…Various modifications, including but not limited to doping the third metal for optimizing absorption energy of water molecule, [5,6] combining with carbon materials for accelerating the conductivity [7] as well as coupling with heterogeneous nanoparticles or amorphous metal oxides for strengthening the interfacial interactions, have been successively achieved to further improve the OER activity. [8,9] In particular, defect engineering has very recently emerged as one of most effective and versatile strategies for the performance enhancement. The well-designed structural defects can not only create highly active sites for water adsorption and activation, but also supply spatially channels for mass and electron transfer.…”
mentioning
confidence: 99%
“…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%
“…So the excellent catalytic activity and stability, along with its scalable and facile fabrication process, promises the use of this three‐dimensional electrode as an attractive non‐noble metal catalyst material toward high‐performance and durable water oxidation in alkaline media. This work also opens up a new opportunity to increase the water oxidation activity of transiton metal nanoarrays by introducing amorphous borate layers on their surface …”
Section: Figurementioning
confidence: 99%