Elemental selenium enables enhanced water oxidation electrocatalysis of NiFe layered double hydroxides

Duan, Shuo; Chen, Shaoqing; Wang, Tanyuan; Li, Shenzhou; Liu, Jianyun; Liang, Jiashun; Xie, Hongjian; Han, Jiantao; Jiao, Shuhong; Cao, Ruiguo; Wang, Hsing‐Lin; Li, Qing

doi:10.1039/c9nr06169j

Cited by 47 publications

(25 citation statements)

References 64 publications

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“…Simultaneously, the presence of NiOOH is also proved by the HRTEM image of Ni2V-MOFs@NF (Figure S25). The lattice fringes with a fringe distance of 1.01 nm belong to the (200) planes of Ni2V-MOFs, while others with a fringe distance of 0.70 nm are assigned to (003) planes of the γ-NiOOH phase . However, during the long-time stability test, the MOF catalysts loaded on the surface of nickel form may fall off due to weak adhesion.…”

Section: Resultsmentioning

confidence: 99%

“…The lattice fringes with a fringe distance of 1.01 nm belong to the (200) planes of Ni2V-MOFs, while others with a fringe distance of 0.70 nm are assigned to (003) planes of the γ-NiOOH phase. 58 However, during the long-time stability test, the MOF catalysts loaded on the surface of nickel form may fall off due to weak adhesion. In addition, the catalysts firmly anchored on the surface of the substrate will be damaged when they afford the constant current impact and corrosion of the strong alkaline electrolyte.…”

Section: Resultsmentioning

confidence: 99%

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3D Hydrangea Macrophylla-like Nickel–Vanadium Metal–Organic Frameworks Formed by Self-Assembly of Ultrathin 2D Nanosheets for Overall Water Splitting

Yang

et al. 2020

ACS Appl. Mater. Interfaces

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The development of highly efficient and low-cost bifunctional noble metal-free electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is an effective strategy for improving efficiency. Herein, novel three-dimensional (3D) bimetallic metal–organic frameworks containing Ni and V with adjustable stoichiometry were synthesized on nickel foam successfully. Notably, Ni2V-MOFs@NF only require rather low overpotentials of 244 and 89 mV for the OER and HER, respectively, and expedites overall water splitting with 1.55 V at 10 mA cm–2 with robust durability during the 80 h test. The high efficiency of the novel obtained electrocatalysts should be attributed to the particular morphological design of the two-dimensional (2D) ultrathin nanosheets self-assembling into a 3D nanoflower and the electronic structure regulation resulting from the synergetic interaction between nickel and vanadium. Subsequent theoretical calculations reveal the following conclusions: (I) the exceptional electronic conductivity of Ni2V-MOFs shows enhanced optimization as a result of electronic structure reconstruction, (II) the energy barrier reduction of the rate-limiting step is responsible for the enhanced dynamics of Ni2V-MOFs for the OER, and (III) the facilitation of the adsorption of H+ and H2O plays a key role in progressing the HER catalytic activity of Ni2V-MOFs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

3D Hydrangea Macrophylla-like Nickel–Vanadium Metal–Organic Frameworks Formed by Self-Assembly of Ultrathin 2D Nanosheets for Overall Water Splitting

Yang

et al. 2020

ACS Appl. Mater. Interfaces

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“…XPS fitting of Fe 2p (Figure 5e) is to provide a qualitative illustration of iron on the near surface of LDHs. Two peaks with the binding energy of 713.60 eV and 727.00 eV could be recognized and well assigned to Fe 2p 3/2 and Fe 2p 1/2 , respectively [38,39]. The detailed Fe content is determined to be about 0.5 wt.…”

Section: Resultsmentioning

confidence: 85%

Efficient Recycling Blast Furnace Slag by Constructing Ti-Embedded Layered Double Hydroxide as Visible-Light-Driven Photocatalyst

et al. 2022

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In this work, a strategy of heat treatment-precipitation has been developed to recycle Ti-containing metallurgical solid waste by forming Ti-embedded MgAl layered double hydroxide (TMA-LDH). This facile and simple route is featured by the dedicated utilization of the composition of slag with high overall recovery efficiency. Importantly, as-obtained product exhibits visible light response distinctly different from that of pristine MA-LDH ascribed to the Fe doping inherited from initial slag. Its mesoporous nanostructure also provides more microchannels for mass and carrier transfer. As such, excellent photocatalytic activity towards degradation of tetracycline hydrochloride is achieved, and 88% removal could be obtained in 60 min. Furthermore, 44% increase in efficiency than that of Ti-excluded LDH also indicates the synergistically promoting effect of Ti incorporation. Mechanism investigation suggests that Ti incorporation regulates the electronic structure of pristine LDH with more active sites, and favors the formation of radicals with improved oxidative ability for photocatalysis.

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“…Owing to their intrinsic electroconductivities and the ability to modify the electronic structures of their active metal centers, metal chalcogenides have been the subject of extensive studies. [62,162] More specifically, the pairing of metal sulfides with other metal catalysts has been reported to improve both the catalyst efficiency and stability during the OER. For instance, Wang and co-workers fabricated (NiFe)S 2 pyrite mesocrystals in the form of nearly single crystalline porous cubes for the OER.…”

Section: The Nife Alloys and The Nife-based Nonoxide Familymentioning

confidence: 99%

Recent Progress on NiFe‐Based Electrocatalysts for the Oxygen Evolution Reaction

Zhao

Zhang

et al. 2020

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are required. [2a,b,3] Among the various sustainable energy candidates, hydrogen fuel has garnered significant attention owing to its natural advantages. Hydrogen is typically a nontoxic and environmentally friendly power source that can be produced from water, which is an earth-abundant reactant, and produces no CO 2 emissions when converted into other energy forms. [4-6] In addition, due to its high mass-specific energy density, hydrogen can be efficiently used in mobile applications. Moreover, hydrogen can be used in combustion engines and fuel cells. Hence, the development of efficient hydrogen-based energy systems is necessary. [7-9] Producing hydrogen by electrolytic water splitting is considered a promising approach to resolve the current environmental crisis and has been extensively investigated with emphasis on availability and sustainability. [10,11] During water electrolysis, the cathodic hydrogen evolution reaction (HER) [12] and the anodic oxygen evolution reaction (OER) occur simultaneously, as exemplified by the following equations

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Elemental selenium enables enhanced water oxidation electrocatalysis of NiFe layered double hydroxides

Abstract: Elemental Se with monoclinic phase tunes the electronic states of metallic sites for NiFe-layered double hydroxides and promotes the generation of γ-NiOOH, leading to enhanced catalytic performance for oxygen evolution reaction.

Cited by 47 publications

References 64 publications

3D Hydrangea Macrophylla-like Nickel–Vanadium Metal–Organic Frameworks Formed by Self-Assembly of Ultrathin 2D Nanosheets for Overall Water Splitting

3D Hydrangea Macrophylla-like Nickel–Vanadium Metal–Organic Frameworks Formed by Self-Assembly of Ultrathin 2D Nanosheets for Overall Water Splitting

Efficient Recycling Blast Furnace Slag by Constructing Ti-Embedded Layered Double Hydroxide as Visible-Light-Driven Photocatalyst

Recent Progress on NiFe‐Based Electrocatalysts for the Oxygen Evolution Reaction

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