Carbon nanotubes decorated with nickel phosphide nanoparticles as efficient nanohybrid electrocatalysts for the hydrogen evolution reaction

Pan, Yuan; Hu, Wenhui; Liu, Dapeng; Liu, Yunqi; Liu, Chenguang

doi:10.1039/c5ta02128f

Cited by 224 publications

(136 citation statements)

References 57 publications

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“…Additionally, the O 1s peak (Figure 3e), with the binding energies of 532.0 eV, indicates the existence of Mo(IV)-O bond [60]. Thus, to some extent, it is also confirmed that the three hybrids were oxidized during the preparation process.…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 62%

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Yang

Kang

Yan

et al. 2018

Metals

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Abstract:The hydrogen evolution reaction (HER) property of molybdenum disulfide (MoS 2 ) is undesirable because of the insufficient active edge sites and the poor conductivity. To enhance HER performance of MoS 2 , nickel phosphide (Ni 2 P) was combined with this catalyst and three MoS 2 /Ni 2 P hybrids (38 wt % Ni 2 P addition for MoS 2 /Ni 2 P-38, 50 wt % Ni 2 P addition for MoS 2 /Ni 2 P-50, and 58 wt % Ni 2 P addition for MoS 2 /Ni 2 P-58) were fabricated via a hydrothermal synthesis process. Morphologies, crystallinities, chemical components, specific surface areas, and HER properties of the fabricated MoS 2 /Ni 2 P samples in an alkaline electrolyte were characterized and tested. In addition, the insight into the HER properties of as-prepared catalysts were revealed by the density functional theory (DFT) calculation. Additionally, the stabilities of pure MoS 2 , Ni 2 P, and MoS 2 /Ni 2 P-50 samples were evaluated. The results show that the addition of Ni 2 P can enhance the HER property of the MoS 2 catalyst. Although HER properties of the above-mentioned three MoS 2 /Ni 2 P hybrids are inferior to that of pure Ni 2 P, they are much higher than that of MoS 2 . Among as-prepared three hybrids, MoS 2 /Ni 2 P-50 exhibits the best HER performance, which may be due to its uniform morphology, large specific surface area, and excellent stability. The MoS 2 /Ni 2 P-50 hybrid shows a high cathodic current density (70 mA/cm 2 at −0.48 V), small Tafel slope (~58 mV/decade), and a low charge transfer resistance (0.83 kΩ·cm 2 ).

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Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 62%

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Yang

Kang

Yan

et al. 2018

Metals

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“…Tafel slopes determined in the region of η from 50 to 150 mV are summarized in Table . The Tafel slopes for C/Co/CoP(Ar,H 2 ), C/Cu/CuP(Ar,H 2 ), and C/Cu/CuP(Ar) were 50, 80, and 65 mV dec −1 , respectively, suggesting that the HER reaction took place via a fast Volmer step followed by a rate determining Heyrovsky step . These Tafel slopes indicated better electrode kinetics than those obtained for C/Co/CoP(Ar), C/Cu/CuP(1000Ar,H 2 ), C/Cu(1000Ar), C/Ni/NiP(Ar,H 2 ), and C/Ni/NiP(Ar) which were 90, 115, 110, 125, and 130 mV dec −1 , respectively.…”

Section: Resultsmentioning

confidence: 97%

“…The semicircles at low frequencies are correlated with an HER process. A smaller diameter corresponds to faster HER kinetics …”

Section: Resultsmentioning

confidence: 99%

Design of Electroactive Carbon Fibers Decorated with Metal and Metal‐Phosphide Nanoparticles for Hydrogen Evolution Technology

et al. 2018

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The preparation of noble‐metal‐free electrode materials that enable the effective and economically viable hydrogen evolution reaction (HER) is proposed by using a needle‐less electrospinning method. Three transition metals (Ni, Co, Cu) capable of creation metal phosphides were stably incorporated into the carbon fibrous matrix. The electrode materials were prepared from low‐cost chemical reagents such as polyacrylonitrile, metal chlorides, and phosphoric acid. The embedded metal phosphides fundamentally influence the composition, microstructure, and porosity as evidenced by X‐ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses. The possible mechanisms for the formation and localization of nanoparticles were suggested. Linear sweep voltammetry, impedance spectroscopy, time of flight (TOF) calculation, and Tafel slope measurements in an acidic environment revealed that the highest electrocatalytic activity for HER was achieved in the carbon fibers decorated either with the cobalt/cobalt phosphide or copper/copper phosphide nanoparticles under heat treatment in a hydrogen atmosphere.

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“…It is well-known that the dehydrogenation and cracking of alkane are assumed to proceed through carbonium-ion intermediates [51][52][53]. For Ni 2 P-ADC catalysts, the partial positive charges carried on Ni surface (Ni ␦+ ) in Ni 2 P-ADC catalysts resulted from electron transfer from Ni to P in nickel phosphide [54,55] is a key factor for the enhancing selectivity, which can obviously decrease the strength of Ni-C bond as well as the ability of dehydrogenation, which improves the selectivity of isobutane dehydrogenation. In addition, the ensemble effect of P is beneficial for improving the catalytic activity by decreasing the number of exposed Ni active sites [54].…”

Section: Catalytic Performance For Isobutane Dehydrogenationmentioning

confidence: 99%

Novel preparation of highly dispersed Ni2P embedded in carbon framework and its improved catalytic performance

Wang

2016

Applied Surface Science

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Carbon nanotubes decorated with nickel phosphide nanoparticles as efficient nanohybrid electrocatalysts for the hydrogen evolution reaction

Abstract: Nickel phosphide nanoparticles decorated on carbon nanotubes were synthesized by in situ thermal decomposition for the first time. The Ni2P/CNT nanohybrid exhibits high activity and stability for hydrogen evolution.

Cited by 224 publications

References 57 publications

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Design of Electroactive Carbon Fibers Decorated with Metal and Metal‐Phosphide Nanoparticles for Hydrogen Evolution Technology

Novel preparation of highly dispersed Ni2P embedded in carbon framework and its improved catalytic performance

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