The effects of Al substitution and partial dissolution on ultrathin NiFeAl trinary layered double hydroxide nanosheets for oxygen evolution reaction in alkaline solution

Liu, Haixia; Wang, Yanrong; Lu, Xinyao; Hu, Yi; Zhu, Guoyin; Chen, Renpeng; Ma, Lianbo; Zhu, Hongfei; Tie, Zuoxiu; Liu, Jie; Jin, Zhong

doi:10.1016/j.nanoen.2017.04.011

Cited by 257 publications

(161 citation statements)

References 47 publications

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“…‘Cation’ doping can tune the morphology of the host matrix revealing more active sites or exposed area. Similar phenomena are already addressed in the reported literature . To clearly evidence this phenomena, FESEM analysis is carried out for Fe 0.2 Ni 0.8 (OH) 2 /NiOOH and Fe 0.05 Ni 0.95 (OH) 2 /NiOOH and shown in Figure S3.…”

Section: Resultssupporting

confidence: 78%

Fe‐Doped Nickel Hydroxide/Nickel Oxyhydroxide Function as an Efficient Catalyst for the Oxygen Evolution Reaction

2019

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Designing metal hydroxide electrocatalysts with high efficiency to overcome the slow reaction kinetics of the oxygen evolution reaction (OER) is considered as a significant approach for renewable energy resources. We report here a simple methodology to synthesize 2D thin nickel hydroxide/nickel oxyhydroxide sheets that show efficient activity towards OER. Further, by doping with a heteroatom, Fe, thinner sheets of nickel hydroxide/nickel oxyhydroxide are developed, which exhibit enhanced electrocatalytic activity towards OER with high durability. Fe‐doped Ni(OH)2/NiOOH requires only 200 mV overpotential to produce 10 mA/cm2, whereas bare Ni(OH)2/NiOOH needs 290 mV overpotential. Moreover, Fe‐doped nickel hydroxide/nickel oxyhydroxide shows a minimal Tafel value of 48 mV/decade, which is even lower than RuO2/CC (82 mV/decade). X‐ray photoelectron spectroscopy indicates that in the case of Fe‐doped Ni(OH)2/NiOOH, the Ni3+ signal enhances, which indicates the favourable stabilization of Ni3+ in the presence of Fe3+ dopant. Under electrochemical OER conditions, in Fe‐doped Ni(OH)2/NiOOH, Fe3+ species help to generate more Ni3+, which function as the active species. Fe0.06Ni0.94(OH)2/NiOOH shows long‐term stability for at least 24 hours in alkaline medium. This work unveils a green strategy for Fe‐doping in 2D thin sheets of Ni(OH)2/NiOOH, which show improved electrocatalytic activity compared to bare Ni(OH)2/NiOOH. The mechanism of OER activity enhancement after Fe‐doping is proposed here.

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Section: Resultssupporting

confidence: 78%

Fe‐Doped Nickel Hydroxide/Nickel Oxyhydroxide Function as an Efficient Catalyst for the Oxygen Evolution Reaction

2019

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“…Meanwhile, other Ni‐based LDHs such as Ni–V monolayer double hydroxide, NiCo LDHs, NiMn LDH, NiFeAl, NiFeMn and NiCoAl ternary LDH nanosheets, were investigated for OER in alkaline electrolyte. Sun and co‐workers reported a monolayer of nickel–vanadium LDH achieving a current density of 27 mA cm −2 (57 mA cm −2 after IR correction) driven by an overpotential of 350 mV for OER .…”

Section: Layered Double‐hydroxide‐based Electrocatalystsmentioning

confidence: 99%

Recent Progress on Nickel‐Based Oxide/(Oxy)Hydroxide Electrocatalysts for the Oxygen Evolution Reaction

Chen

Rui

Zhu

et al. 2018

Chemistry A European J

198

127

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Developing clean and sustainable energies as alternatives to fossil fuels is in strong demand within modern society. The oxygen evolution reaction (OER) is the efficiency-limiting process in plenty of key renewable energy systems, such as electrochemical water splitting and rechargeable metal-air batteries. In this regard, ongoing efforts have been devoted to seeking high-performance electrocatalysts for enhanced energy conversion efficiency. Apart from traditional precious-metal-based catalysts, nickel-based compounds are the most promising earth-abundant OER catalysts, attracting ever-increasing interest due to high activity and stability. In this review, the recent progress on nickel-based oxide and (oxy)hydroxide composites for water oxidation catalysis in terms of materials design/synthesis and electrochemical performance is summarized. Some underlying mechanisms to profoundly understand the catalytic active sites are also highlighted. In addition, the future research trends and perspectives on the development of Ni-based OER electrocatalysts are discussed.

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“…For instance, NiV‐LDHs was reported to show enhanced intrinsic catalytic property toward OER due to better conductivity and richer active sites; the theoretical calculation also indicated that vanadium doping could significantly lower the overpotential for the rate‐determining step . Another work recently highlights that the aluminum doping is found to be very advantageous since it would help to increase the number of active sites when Al atoms are partially etched under strong alkaline media . Also, to the extent of our knowledge, not many studies have reported HER and overall water electrolysis catalytic activity of layer hydroxide material in alkaline condition.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Dinh

Zheng

Dai

et al. 2017

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Herein, the hydrothermal synthesis of porous ultrathin ternary NiFeV layer double hydroxides (LDHs) nanosheets grown on Nickel foam (NF) substrate as a highly efficient electrode toward overall water splitting in alkaline media is reported. The lateral size of the nanosheets is about a few hundreds of nanometers with the thickness of ≈10 nm. Among all molar ratios investigated, the Ni Fe V -LDHs/NF electrode depicts the optimized performance. It displays an excellent catalytic activity with a modest overpotential of 231 mV for the oxygen evolution reaction (OER) and 125 mV for the hydrogen evolution reaction (HER) in 1.0 m KOH electrolyte. Its exceptional activity is further shown in its small Tafel slope of 39.4 and 62.0 mV dec for OER and HER, respectively. More importantly, remarkable durability and stability are also observed. When used for overall water splitting, the Ni Fe V -LDHs/NF electrodes require a voltage of only 1.591 V to reach 10 mA cm in alkaline solution. These outstanding performances are mainly attributed to the synergistic effect of the ternary metal system that boosts the intrinsic catalytic activity and active surface area. This work explores a promising way to achieve the optimal inexpensive Ni-based hydroxide electrocatalyst for overall water splitting.

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The effects of Al substitution and partial dissolution on ultrathin NiFeAl trinary layered double hydroxide nanosheets for oxygen evolution reaction in alkaline solution

Cited by 257 publications

References 47 publications

Fe‐Doped Nickel Hydroxide/Nickel Oxyhydroxide Function as an Efficient Catalyst for the Oxygen Evolution Reaction

Fe‐Doped Nickel Hydroxide/Nickel Oxyhydroxide Function as an Efficient Catalyst for the Oxygen Evolution Reaction

Recent Progress on Nickel‐Based Oxide/(Oxy)Hydroxide Electrocatalysts for the Oxygen Evolution Reaction

Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting

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