Defect-enriched iron fluoride-oxide nanoporous thin films bifunctional catalyst for water splitting

Fan, Xiujun; Liu, Yuanyue; Chen, Shuai; Shi, Jianjian; Wang, Juanjuan; Fan, Aiping; Zan, Wenyan; Li, Si‐Dian; Goddard, William A.; Zhang, Xianming

doi:10.1038/s41467-018-04248-y

Cited by 209 publications

(99 citation statements)

References 50 publications

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“…The measurement was performed in a potential window of 0.18–0.28 V versus RHE, where the Faradic current on working electrode was negligible. The series of scan rates ranging from 10 to 200 mV s −1 was applied to build a plot of the charging current density differences against the scan rate at a fixed potential of 0.23 V. The slope of the obtained linear curve was twice of the double‐layer capacitance ( C dl ), which was used to estimate ECSA …”

Section: Methodsmentioning

confidence: 99%

Metal‐Organic Precursor–Derived Mesoporous Carbon Spheres with Homogeneously Distributed Molybdenum Carbide/Nitride Nanoparticles for Efficient Hydrogen Evolution in Alkaline Media

Cheng

Sagaltchik

et al. 2018

Adv Funct Materials

114

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The generation of hydrogen through water electrolysis is considered as a sustainable approach for future fuel production. Molybdenum (Mo)-based compounds are reported as highly active and inexpensive alternatives to platinum-based electrocatalysts for the hydrogen evolution reaction (HER). Currently, the major challenge for Mo-based HER electrocatalysts lies in establishing new concepts of micro-/nanostructure design to enhance the hydrogen evolution kinetics and realizing facile, large-scale, and green fabrication processes. Here, a fast, scalable, and eco-friendly metal-organic coordination precursor-assisted strategy is reported for synthesizing novel hierarchically mesoporous Mo-based carbon electrocatalysts for efficient hydrogen production. Benefiting from homogeneously distributed Mo-based nanocrystallites/heterojunctions and uniform mesopores, the Mo-based mesoporous electrocatalyst shows high hydrogen evolution activity and stability with a low overpotential of 222 mV at 100 mA cm −2 (Pt/C: 263 mV), ranging among the best non-noble metal HER catalysts in alkaline condition. Overall, the discovery of using dopamine-molybdate coordination precursor with silica nanoparticles will not only create a new pathway for controllable synthesis of diverse kinds of micro-/nanostructured Mo-based catalysts, but also take a step toward the fast and scale-up production of advanced mesoporous carbon electrodes for a broad range of applications.

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Section: Methodsmentioning

confidence: 99%

Metal‐Organic Precursor–Derived Mesoporous Carbon Spheres with Homogeneously Distributed Molybdenum Carbide/Nitride Nanoparticles for Efficient Hydrogen Evolution in Alkaline Media

Cheng

Sagaltchik

et al. 2018

Adv Funct Materials

114

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“…[2] Noble-metal-based catalysts RuO 2 and IrO 2 are recognized as the state-of-the-art OER electrocatalysts, but their widespread practical application is greatly limited by their scarcity and high cost. Non-noble-metal electrocatalysts, such as transition-metal-based carbides, [4] nitrides, [5] carbonitrides, [6] oxides, [7] fluorides, [8] sulfides, [9] phosphides, [10] metal-organic frameworks, [11] and carbon dots [12] are regarded as potential substitutes for preciousmetal catalysts. Non-noble-metal electrocatalysts, such as transition-metal-based carbides, [4] nitrides, [5] carbonitrides, [6] oxides, [7] fluorides, [8] sulfides, [9] phosphides, [10] metal-organic frameworks, [11] and carbon dots [12] are regarded as potential substitutes for preciousmetal catalysts.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Gel‐Derived Multimetal Oxides as Effective Electrocatalysts for the Oxygen Evolution Reaction

Cao

Jiang

et al. 2019

ChemSusChem

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Exploring efficient and durable catalysts derived from earth‐abundant and cost‐effective materials is a highly desirable route to overcome the sluggish anodic oxygen evolution reaction (OER). A series of multinary metal–organic gels (MOGs) with various and alterable metal element compositions are prepared by straightforward mixing of metal ions with ligand 4,4′,4′′‐[(1,3,5‐triazine‐2,4,6‐triyl)tris(azanediyl)]tribenzoic acid (H3TATAB) in solution at room temperature. Spinel‐type metal oxides with excellent electrocatalytic OER performance were then obtained through calcination of the as‐synthesized MOGs. In electrochemical testing, the trimetallic oxide CoFeNi‐O‐1 (derived from the MOG with a Co/Fe/Ni molar ratio of 5:1:4) exhibits remarkable catalytic activity with a low overpotential of 244 mV at a current density of 10 mA cm−2 and a small Tafel slope of 55.4 mV dec−1 in alkaline electrolyte, outperforming most recently reported electrocatalysts. This work not only provides a promising OER catalyst and enriches the application of MOGs in the catalytic field, but also offers a facile new route to acquiring multicomponent metal oxides with high electrocatalytic activity.

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“…Although much progress has been made in fabricating materials that are active for either the OER or HER, fewer materials that are bifunctional and active for both reactions have been developed . There have been many reports on the use of metal sulfides, phosphides, and selenides, which are known electrocatalysts for the HER, to be also active for the OER.…”

Section: Introductionmentioning

confidence: 99%

Gold Doping in a Layered Co‐Ni Hydroxide System via Galvanic Replacement for Overall Electrochemical Water Splitting

Sultana

Riches

O’Mullane

2018

Adv Funct Materials

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The development of active yet stable bifunctional materials to produce hydrogen and oxygen via electrochemical water splitting is an ongoing challenge. Here, a system based on electrodeposited Ni(OH) 2 and Co(OH) 2 containing highly distributed gold nanoparticles at less than 0.25 at% to facilitate the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions is developed. The key aspect is using galvanic replacement to deposit gold on a layer of electrodeposited Co(OH) 2 prior to electrodepositing Ni(OH) 2 . The fabrication of a composite system based on Co(OH) 2 -Au-Ni(OH) 2 is required for optimal activity for both the HER and OER. The composite is characterized with helium ion microscopy, transmission electron microscopy, depth profiling X-ray photoelectron microscopy, and a variety of electrochemical techniques. This material exceeds the activity of Pt for the HER at current densities greater than 40 mA cm −2 and is stable for both reactions for prolonged periods of electrolysis. In a two-electrode configuration, current densities greater than 175 mA cm −2 for overall water splitting could be readily achieved at an applied voltage of 1.90 V in a commercially relevant electrolyte of 6 m NaOH.

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Defect-enriched iron fluoride-oxide nanoporous thin films bifunctional catalyst for water splitting

Cited by 209 publications

References 50 publications

Metal‐Organic Precursor–Derived Mesoporous Carbon Spheres with Homogeneously Distributed Molybdenum Carbide/Nitride Nanoparticles for Efficient Hydrogen Evolution in Alkaline Media

Metal‐Organic Precursor–Derived Mesoporous Carbon Spheres with Homogeneously Distributed Molybdenum Carbide/Nitride Nanoparticles for Efficient Hydrogen Evolution in Alkaline Media

Metal–Organic Gel‐Derived Multimetal Oxides as Effective Electrocatalysts for the Oxygen Evolution Reaction

Gold Doping in a Layered Co‐Ni Hydroxide System via Galvanic Replacement for Overall Electrochemical Water Splitting

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