Hierarchical iron-doped CoP heterostructures self-assembled on copper foam as a bifunctional electrocatalyst for efficient overall water splitting

Huang, Xiaokang; Gong, Li; Xu, Hui; Qin, Jiaheng; Ma, Ping; Yang, Ming; Wang, Kaizhi; Ma, Lu‐Fang; Mu, Xiao; Li, Rong

doi:10.1016/j.jcis.2020.02.073

Cited by 61 publications

(17 citation statements)

References 62 publications

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“…Electrocatalytic water splitting is divided into two half-reactions, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) . This process can effectively produce hydrogen with zero carbon emission . The catalyst is crucial to promote the water electrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting

Wang

et al. 2021

ACS Appl. Nano Mater.

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The development of bifunctional catalysts possessing high efficiency and excellent stability was still a challenge as regards overall water splitting. Herein, a reasonable space division strategy of Ni foam (NF) was proposed to design a bifunctional catalyst. Ni-P alloy was loaded on carbon nanotubes (CNTs) through Pd-free electroless plating (Ni-P/CNTs). Subsequently, the Ni-P/CNT catalysts mixed with melamine were annealed for N doping. The N-doped CNTs coated with N-doped Ni3P and Ni nanoparticles (N-Ni3P-Ni/N-CNTs) were obtained. Finally, the N-Ni3P-Ni/N-CNTs were used as a filler to divide the pore size of NF by electroplating Ni, obtaining a network-like hierarchical porous electrode (N-Ni3P-Ni/N-CNTs/NF). This hierarchical porous structure exposed abundant catalytically active sites, facilitated the mass transfer, and prevented the catalyst agglomeration and corrosion that promote electrolyte contact and favor facile electron transfer kinetics. On the basis of the rational design, a self-supported N-Ni3P-Ni/N-CNTs/NF electrode showed a high specific surface area and exhibited superior electrocatalytic performances. The electrode achieved low overpotential of 73 and 270 mV at 10 mA cm–2 for the hydrogen and oxygen evolution reaction, respectively. Besides, it required a cell voltage of only 1.57 V to achieve 20 mA cm–2 when assembled in a 1 M KOH electrolyte for overall water splitting. Hence, this study represented a rational design of self-supported bifunctional electrode for overall water splitting.

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Section: Introductionmentioning

confidence: 99%

“…2 This process can effectively produce hydrogen with zero carbon emission. 3 The catalyst is crucial to promote the water electrolysis. Precious metal-based materials, such as Pt, IrO 2 , and RuO 2 , are presently considered as the perfect catalysts for HER or OER.…”

Section: Introductionmentioning

confidence: 99%

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting

Wang

et al. 2021

ACS Appl. Nano Mater.

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“…11,12 The search for highly efficient and low-cost non-noble-metal catalysts indicates the way for researchers. [13][14][15] Transition metals have attracted more and more attention due to their abundant reserves and great catalytic potential. [16][17][18] In particular, calculation of the hydrogen adsorption free energy of the transition metals Ni and Co has shown that both Ni and Pt have excellent adsorption activities, although their desorption ability is only average, and Co is just the opposite.…”

Section: Introductionmentioning

confidence: 99%

3D nanoporous NiCoP as a highly efficient electrocatalyst for the hydrogen evolution reaction in alkaline electrolyte

Zhou

Wang

2022

New J. Chem.

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“…In view of the current crisis of fossil fuels and the increasingly serious situation of energy pollution, the research of clean and renewable low‐carbon energy applied with electrolyzing water technology has become a research direction with far‐reaching prospects for scientists in the world currently 1‐3 . One of the most efficient solutions to satisfy the global energy demand is to product clean energy by electrolyzing water currently 4‐6 . As one of functional electrocatalysts to improve the activity of electrocatalysis with OER/HER, bimetallic‐cation doping electrocatalysts are widely used in the manufacture of bifunctional electrocatalysts which can indirectly replace precious metal‐based electrocatalysts 7‐9 .…”

Section: Introductionmentioning

confidence: 99%

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

Zhang

Jiang

et al. 2022

Intl J of Energy Research

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Summary Development of high‐authority and rich‐in‐crust bifunctional electrocatalysts for overall water splitting has a great significance of clean energy storage and conversion with both of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, cobalt‐iron complex sulfides with the same metal molar ratio firmly grown on the surface of nickel foam modified by reduced graphene oxide (Co0.50Fe0.50S‐rGO@NF) was prepared and acted as a superior electrocatalyst for electrolyzing water. The same mole ratio of bimetallic‐cation doping can induce strong electron‐interaction between the complex sulfides and the surface of nickel foam carrier modified by reduced graphene oxide, which reduces the electronic adsorption energy required for HER and OER, as well as improves the electrocatalytic active area exposure. As a result, the optimal electrocatalyst of Co0.50Fe0.50S‐rGO@NF behaves excellent electrocatalytic performance with the overpotential of 189 mV @ η20 mA·cm−2 in 1.0 M KOH solution for OER and the overpotential of 155 mV @ η10 mA·cm−2 in 0.5 M H2SO4 solution for HER, respectively. A self‐built conventional two‐electrode electrolytic cell by using Co0.50Fe0.50S‐rGO@NF as the anode and cathode presents lower voltages of 1.39 and 1.66 V to deliver the current density of 10 mA·cm−2 in 1.0 M KOH and 1.0 M PBS electrolytes, respectively. This study underlines the synergism of the bimetallic‐cation doping complex sulfides loaded on nickel foam modified by rGO for boosting the electrocatalytic activity of overall water splitting.

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Hierarchical iron-doped CoP heterostructures self-assembled on copper foam as a bifunctional electrocatalyst for efficient overall water splitting

Cited by 61 publications

References 62 publications

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting

3D nanoporous NiCoP as a highly efficient electrocatalyst for the hydrogen evolution reaction in alkaline electrolyte

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

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Hierarchical iron-doped CoP heterostructures self-assembled on copper foam as a bifunctional electrocatalyst for efficient overall water splitting

Cited by 61 publications

References 62 publications

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni3P and Ni Nanoparticles for Catalytic Water Splitting

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni3P and Ni Nanoparticles for Catalytic Water Splitting

3D nanoporous NiCoP as a highly efficient electrocatalyst for the hydrogen evolution reaction in alkaline electrolyte

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

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Product

Resources

About

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting

Porous Ni Foams Filled by N-Doped Carbon Nanotubes Coated with N-Doped Ni₃P and Ni Nanoparticles for Catalytic Water Splitting