In situ formation of N-doped carbon-coated porous MoP nanowires: a highly efficient electrocatalyst for hydrogen evolution reaction in a wide pH range

Pi, Chaoran; Huang, Chao; Yang, Yixuan; Song, Hao; Zhang, Xuming; Zheng, Yang; Gao, Biao; Fu, Jijiang; Chu, Paul K.; Huo, Kaifu

doi:10.1016/j.apcatb.2019.118358

Cited by 134 publications

(49 citation statements)

References 60 publications

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“…This durability of the Ni 0.85 Se@NC catalyst can be attributed in part to the Ni 0.85 Se being embedded in a porous carbon shell, preventing it from agglomerating and pulverizing. [ 47–49 ] The HER performance was also investigated in alkaline (1.0 m KOH solution, pH = 13) and neutral electrolytes (1.0 m PBS solution, pH = 7), as HER typically requires higher energy to overcome sluggish kinetic barriers under these conditions. As expected, the HER performance of Ni x Se y @NC in alkaline and neutral media are comparatively lower than that in acidic medium according to the LSV curves ( Figure a,c).…”

Section: Resultsmentioning

confidence: 99%

Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Huang

et al. 2020

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N‐doped carbon‐encapsulated transition metal selenides (TMSs) have garnered increasing attention as promising electrocatalysts for hydrogen evolution reaction (HER). Accurately regulating the electronic structure of these nanohybrids to reveal the underlying mechanism for enhanced HER performances is still challenging and thus requires deep excavation. Herein, a series of pomegranate‐like NixSey@NC core–shell nanohybrids (including Ni0.85Se @ NC, NiSe2@NC, and NiSe@NC) through controllable selenization of a Ni‐MOF precursor is reported. The component of the nanohybrids can be fine‐tuned by tailoring the selenization temperature and feed ratio, through which the electronic structure can be synchronously regulated. Among these nanohybrids, the Ni0.85Se @ NC exhibits the optimum pH‐universal HER performance with overpotentials of 131, 135, and 183 mV in 0.5 m H2SO4, 1.0 m KOH, and 1.0 m PBS, respectively, at 10 mA cm−2, which are attributed to the increased partial density of state at the Fermi level and effective van der Waals interactions between Ni0.85Se and NC matrix explained by density functional theory calculations.

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Section: Resultsmentioning

confidence: 99%

Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Huang

et al. 2020

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“…NaH 2 PO 2 as the P source at moderate-to-high temperature. 112 2.2.3 Pyrolysis of metal organic frameworks (MOFs) and MOF nanocomposites. Increasingly, MOFs and MOF nanocomposites are gaining in popularity for the rational fabrication of nanocatalysts for efficient application in energy conversion and storage technologies.…”

Section: Overcoating Of Metal Nanoparticles With Inorganic Carbon Nanoshellsmentioning

confidence: 99%

Catalyst overcoating engineering towards high-performance electrocatalysis

2022

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“…In addition, M-N-C materials have received recent attention as catalysts for HER [36][37][38]. Tailoring texture of M-N-C materials can boost ORR and HER activity and mass transfer [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

et al. 2021

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The development of electrocatalysts for energy conversion and storage devices is of paramount importance to promote sustainable development. Among the different families of materials, catalysts based on transition metals supported on a nitrogen-containing carbon matrix have been found to be effective catalysts toward oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) with high potential to replace conventional precious metal-based catalysts. In this work, we developed a facile synthesis strategy to obtain a Fe-N-C bifunctional ORR/HER catalysts, involving wet impregnation and pyrolysis steps. Iron (II) acetate and imidazole were used as iron and nitrogen sources, respectively, and functionalized carbon black pearls were used as conductive support. The bifunctional performance of the Fe-N-C catalyst toward ORR and HER was investigated by cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy in alkaline environment. ORR onset potential and half-wave potential were 0.95 V and 0.86 V, respectively, indicating a competitive performance in comparison with the commercial platinum-based catalyst. In addition, Fe-N-C had also a good HER activity, with an overpotential of 478 mV @10 mAcm−2 and Tafel slope of 133 mVdec−1, demonstrating its activity as bifunctional catalyst in energy conversion and storage devices, such as alkaline microbial fuel cell and microbial electrolysis cells.

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In situ formation of N-doped carbon-coated porous MoP nanowires: a highly efficient electrocatalyst for hydrogen evolution reaction in a wide pH range

Cited by 134 publications

References 60 publications

Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Catalyst overcoating engineering towards high-performance electrocatalysis

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

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In situ formation of N-doped carbon-coated porous MoP nanowires: a highly efficient electrocatalyst for hydrogen evolution reaction in a wide pH range

Cited by 134 publications

References 60 publications

Accurately Regulating the Electronic Structure of NixSey@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Accurately Regulating the Electronic Structure of NixSey@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Catalyst overcoating engineering towards high-performance electrocatalysis

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

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Product

Resources

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Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction

Accurately Regulating the Electronic Structure of Ni_xSe_y@NC Core–Shell Nanohybrids through Controllable Selenization of a Ni‐MOF for pH‐Universal Hydrogen Evolution Reaction