Large-scale hierarchical oxide nanostructures for high-performance electrocatalytic water splitting

Ou, Gang; Fan, Peixun; Zhang, Hongjun; Huang, Kai; Yang, Cheng; Yu, Wensheng; Wei, Hehe; Zhong, Minlin; Wu, Hui; Li, Yadong

doi:10.1016/j.nanoen.2017.03.049

Cited by 99 publications

(50 citation statements)

References 46 publications

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“…However, a large overpotential is required to overcome the kinetic barrier induced by the high activation energy, and thus to form the reaction intermediates in the system, whatever for an anodic oxygen evolution reaction (OER) and a cathodic hydrogen evolution reaction (HER) [7]. For the practical water spitting, the effective catalysts are needed to decrease the overpotential of the reaction, thus making the process more energy-efficient [8][9][10]. In this regard, the state-of-the art precious metals (Pt, IrO 2 , RuO 2 ) for OER and HER have suffered from the high price and lack of reserves, thus limiting their applications for the overall water splitting [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Xiao

Tian

et al. 2017

Sci. China Mater.

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The development of effective and low-cost catalysts for overall water splitting is essential for clean production of hydrogen from water. In this paper, we report the synthesis of cobalt-vanadium (Co-V) bimetal-based catalysts for the effective water splitting. The Co 2 V 2 O 7 ·xH 2 O nanoplates containing both Co and V elements were selected as the precursors. After the calcination under NH 3 atmosphere, the Co 2 VO 4 and Co/VN could be obtained just by tuning the calcination temperature. Electrochemical tests indicated that the Co-V bimetal-based materials could be used as active hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalyst by regulating their structure. The Co/VN showed good performance for HER with the onset potential of 68 mV and can achieve a current density of 10 mA cm −2 at an overpotential of 92 mV. Meanwhile, the Co 2 VO 4 exhibited the obvious OER performance with overpotential of 300 mV to achieve a current density of 10 mA cm −2 . When the Co 2 VO 4 and Co/VN were used as the anode and cathode in a twoelectrode system, respectively, the cell needed a voltage of 1.65 V to achieve 10 mA cm −2 together with good stability. This work would be indicative to constructing Co-V bimetalbased catalysts for the catalytic application.

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Section: Introductionmentioning

confidence: 99%

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Xiao

Tian

et al. 2017

Sci. China Mater.

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“…However, in the Fe‐based LDH, the HER kinetics were sluggish in alkaline conditions owing to the weak absorption ability toward water molecules and OH − intermediates of Fe 3+ . In metal oxides, NiO has been proved to be an excellent catalyst and accelerator for the HER reaction …”

Section: Introductionmentioning

confidence: 99%

“…Generally, the powder catalysts need to be adhered to conducting substrates with a polymer binder, which is assumed to decrease the catalytic performance and stability of the samples. Nevertheless, it is known that laser ablation can be used to fabricate a solid surface with rich micro‐ and nanostructures in a simple, noncontact, highly efficient, and easily controlled way . Motivated by this, in this work, a two‐step strategy was used to prepare a binder‐free hierarchical Ni/NiO@CoFe LDH electrocatalyst for overall water splitting.…”

Section: Introductionmentioning

confidence: 99%

“…[33,34] In metal oxides, NiO has been provedt ob ea ne xcellent catalyst anda ccelerator for the HER reaction. [35,36] Laser ablation has been reported as au seful method for preparing high-performance OERc atalysts. [37][38][39] However,t he catalysts prepared by these methods were normally dispersed in solution,w hich cannot be directly used as catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, it is known that laser ablation can be used to fabricate as olid surface with rich micro-and nanostructures in as imple, noncontact, highly efficient, and easily controlledw ay. [36,40] Motivated by this, in this work, at wo-step strategy was used to prepareabinder-freeh ierarchical Ni/NiO@CoFeL DH electrocatalyst for overall water splitting. First, the Ni/NiO micro-and nanostructure was prepared by laser ablation of Ni foams within af ew tens of seconds.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting

Yin

et al. 2019

ChemSusChem

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The development of simple and effective methods for the rapid preparation of electrocatalysts for overall water splitting from earth‐abundant elements is an important and challenging task. A facile and ultrafast two‐step method was developed to prepare a Ni/NiO@CoFe layered double hydroxide hierarchical nanostructure (NCF) within a few minutes by femtosecond laser ablation and electrodeposition. In 1 m KOH solution, the optimized NCF catalysts show a low overpotential of 230 mV for the oxygen evolution reaction (OER) at a current density of 10 mA cm−2 with a low Tafel slope of 34.3 mV dec−1, indicating fast and efficient OER kinetics. Owing to the synergistic effect between NiO and CoFe layered double hydroxide, the hydrogen evolution reaction performance of the NCF was also improved. The synthesized electrocatalysts were further utilized in overall water splitting with a potential of only 1.56 V at a current density of 10 mA cm−2 and excellent durability, better than that of the commercial RuO2(+)//Pt/C(−) system. The present work provides new insights on the rapid and facile preparation of efficient electrocatalysts for overall water splitting on a large scale.

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Defect‐Rich Ni₃FeN Nanocrystals Anchored on N‐Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution

Zhao

Han

et al. 2017

Adv Funct Materials

183

142

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Owing to their unique optical, electronic, and catalytic properties, metal nitrides nanostructures are widely used in optoelectronics, clean energy, and catalysis fields. Despite great progress has been achieved, synthesis of defect-rich (DR) bimetallic nitride nanocrystals or related nanohybrids remains a challenge, and their electrocatalytic application for oxygen evolution reaction (OER) has not been fully studied. Herein, the DR-Ni 3 FeN nanocrystals and N-doped graphene (N-G) nanohybrids (DR-Ni 3 FeN/N-G) are fabricated through temperature-programmed annealing and nitridation treatment of NiFe-layered double hydroxides/graphene oxide precursors by controlling annealing atmosphere. In the nanohybrids, the DR-Ni 3 FeN nanocrystals are anchored on N-G, and mainly show twin crystal defects besides ≈10% of stacking faults. Such nanohybrids can efficiently catalyze OER in alkaline media with a small overpotential (0.25 V) to attain the current density of 10 mA cm −2 and a high turnover frequency (0.46 s −1 ), superior to their counterparts (the nearly defect-free Ni 3 FeN/N-G), commercial IrO 2 , and the-state-of-art reported OER catalysts. Except for the superior activity, they show better durability than their counterparts yet. As revealed by microstructural, spectroscopic, and electrochemical analyses, the enhanced OER performance of DR-Ni 3 FeN/N-G nanohybrids originates from the abundant twin crystal defects in Ni 3 FeN active phase and the strong interplay between

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Large-scale hierarchical oxide nanostructures for high-performance electrocatalytic water splitting

Cited by 99 publications

References 46 publications

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting

Defect‐Rich Ni₃FeN Nanocrystals Anchored on N‐Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution

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Large-scale hierarchical oxide nanostructures for high-performance electrocatalytic water splitting

Cited by 99 publications

References 46 publications

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting

Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting

Defect‐Rich Ni3FeN Nanocrystals Anchored on N‐Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution

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Product

Resources

About

Defect‐Rich Ni₃FeN Nanocrystals Anchored on N‐Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution