Nitrogen, phosphorus dual-doped molybdenum-carbide/molybdenum-phosphide-@-carbon nanospheres for efficient hydrogen evolution over the whole pH range

Chi, Jing‐Qi; Gao, Wen-Kun; Lin, Jai-Ming; Dong, Bin; Yan, Kai-Li; Qin, Jun-Feng; Liu, Zi-Zhang; Chai, Yong‐Ming; Liu, Chenguang

doi:10.1016/j.jcis.2017.11.023

Cited by 49 publications

(11 citation statements)

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“…According to previous experimental and computational studies, a large interplanar space is beneficial to improve the kinetics and capacity of Li/Na ions storage . The well resolved crystal lattice fringes with interplanar spacing of 0.21 nm matches very well with the (101) crystalline facets of MoP species (the inset in Figure c) . The electron diffraction patterns of the NPCNFs (the inset in Figure d) indicates that the locally distributed carbon at MoP@NPCNFs possesses an amorphous structure, which is consistent with the results as illustrated in the high resolution transmission electron microscope (HRTEM) image (Figure d).…”

Section: Resultssupporting

confidence: 87%

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

Liu

et al. 2019

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.201905301.Rechargeable potassium-ion batteries (PIBs) have attracted tremendous attention as potential electrical energy storage systems due to the special merit of abundant resources and low cost of potassium. However, one critical barrier to achieve practical application of PIBs has been the lack of suitable electrode materials. Here, a novel flexible membrane consisting of N, P codoped carbon nanofibers decorated with MoP ultrafine nanoparticles (MoP@NPCNFs) is fabricated via a simple electrospinning method combined with the later carbonization and phosphorization process. The 3D porous CNF structure in the as-synthesized composite can shorten the transport pathways of K-ions and improve the conductivity of electrons. The ultrafine MoP nanoparticles can guarantee high specific capacity and the N, P co-doping could improve wettability of electrodes to electrolytes. As expected, the free-standing MoP@NPCNF electrode demonstrates a high capacity of 320 mAh g −1 at 100 mA g −1 , a superior rate capability maintaining 220 mAh g −1 at 2 A g −1 , as well as a capacity retention of more than 90% even after 200 cycles. The excellent rate performance, high reversible capacity, long-term cycling stability, and facile synthesis routine make this hybrid membrane promising anode for potassium-ion batteries. www.advancedsciencenews.com

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Section: Resultssupporting

confidence: 87%

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

Liu

et al. 2019

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“…Two‐dimensional (2D) transition‐metal dichalcogenides (TMDs) have attracted significant attention over the past decade due to for their unique optical and electrical properties . Representative TMDs, such as MoS 2 and WS 2 , have attracted significant attention for photocatalytic hydrogen evolution reactions (HERs) based on their unique catalytic properties, earth abundance, and bandgap energy, which facilitates absorption in the visible region of the solar spectrum . Because WS 2 possesses a crystal structure and chemical properties similar to those of MoS 2 , some researches have demonstrated that it is photocatalytically active for hydrogen evolution from water by itself .…”

Section: Introductionmentioning

confidence: 99%

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

Tekalgne

Hasani

et al. 2019

Physica Status Solidi (a)

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In this paper, a facile method for synthesizing WS2 nanoflowers (NFs) and CdSe quantum dots (QDs) using hydrothermal and hot injection methods, are reported, respectively. Additionally, the photocatalytic activity of a CdSe QDs/WS2 NF nanocomposite is analyzed in a typical three‐electrode electrochemical cell. It is found that the CdSe QDs/WS2 NF hybrid exhibits a current density of −1.12 mA at 0 V and a Tafel slope of 82 mV dec−1, which are superior to the values of bare WS2 NFs (current density of −0.25 mA and Tafel slope of 150 mV dec−1). This improvement of photocatalytic performance is attributed to the wide range of light absorption for e−/h+ generation provided by the CdSe QDs, as well as the large surface area and numerous active sites for hydrogen production provided by WS2 NFs. Therefore, the CdSe QDs/WS2 NF hybrid structure is a promising candidate for highly effective and stable photocatalytic performance under solar light illumination for hydrogen production.

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“…20 Although some progress has been made for preparing highly active MoP, the exposed active sites are affected by the morphologies and nanostructures. 21 Moreover, well-crystallized nanostructured MoP is usually formed at temperatures exceeding 800 °C; 22,23 thus, it is still a great challenge to design unique nanostructures to prevent its coalescence and aggregation at high temperature.…”

Section: ■ Introductionmentioning

confidence: 99%

Induced Phosphorization-Derived Well-Dispersed Molybdenum Phosphide Nanoparticles Encapsulated in Hollow N-Doped Carbon Nanospheres for Efficient Hydrogen Evolution

Chi

Gao

Zhang

et al. 2018

ACS Sustainable Chem. Eng.

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Molybdenum phosphide (MoP) nanoparticles encapsulated in N,P-codoped hollow carbon nanospheres (MoP@ NPC-H) have been synthesized as electrocatalysts for hydrogen evolution reaction (HER) based on an induced phosphorization of an inorganic-organic Mo-P/polyaniline-pyrrole precursor. Notably, the P sources in the polyaniline-pyrrole precursor are responsible for the formation of well-dispersed MoP nanoparticles and enlarged hollow carbon nanospheres through a P-induced process, which can be described as induced phosphorization for realizing the shift and good dispersion of MoP encapsulated in carbon nanospheres. In addition, the polyaniline-pyrrole precursor could avoid the aggregation of MoP nanoparticles and protect MoP from corrosion during the HER process. N,P-codoped carbon layers provide remarkable conductivity for the higher utilization of active sites. Moreover, compared to solid nanostructures

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Nitrogen, phosphorus dual-doped molybdenum-carbide/molybdenum-phosphide-@-carbon nanospheres for efficient hydrogen evolution over the whole pH range

Cited by 49 publications

References 50 publications

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production

Induced Phosphorization-Derived Well-Dispersed Molybdenum Phosphide Nanoparticles Encapsulated in Hollow N-Doped Carbon Nanospheres for Efficient Hydrogen Evolution

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Nitrogen, phosphorus dual-doped molybdenum-carbide/molybdenum-phosphide-@-carbon nanospheres for efficient hydrogen evolution over the whole pH range

Cited by 49 publications

References 50 publications

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

Flexible Membrane Consisting of MoP Ultrafine Nanoparticles Highly Distributed Inside N and P Codoped Carbon Nanofibers as High‐Performance Anode for Potassium‐Ion Batteries

CdSe Quantum Dots Doped WS2 Nanoflowers for Enhanced Solar Hydrogen Production

Induced Phosphorization-Derived Well-Dispersed Molybdenum Phosphide Nanoparticles Encapsulated in Hollow N-Doped Carbon Nanospheres for Efficient Hydrogen Evolution

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CdSe Quantum Dots Doped WS₂ Nanoflowers for Enhanced Solar Hydrogen Production