58 research outputs found
Additional file 1: Table S1. of Genome-wide systematic characterization of the bZIP transcriptional factor family in tomato (Solanum lycopersicum L.)
The identified tomato bZIP proteins and their related information. (DOC 166 kb
Unique Fe<sub>2</sub>P Nanoparticles Enveloped in Sandwichlike Graphited Carbon Sheets as Excellent Hydrogen Evolution Reaction Catalyst and Lithium-Ion Battery Anode
The novel Fe<sub>2</sub>P nanoparticles
encapsulated in sandwichlike graphited carbon envelope nanocomposite
(Fe<sub>2</sub>P/GCS) that can be first applied in hydrogen evolution
reaction (HER) as well as lithium-ion batteries (LIBs) has been designed
and fabricated. The unique sandwiched Fe<sub>2</sub>P/GCS is characterized
with several prominent merits, including large specific surface area,
nanoporous structure, excellent electronic conductivity, enhanced
structural integrity and so on. All of these endow the Fe<sub>2</sub>P/GCS with brilliant electrochemical performance. When used as a
HER electrocatalyst in acidic media, the harvested Fe<sub>2</sub>P/GCS
demonstrates low onset overpotential and Tafel slope as well as particularly
outstanding durability. Moreover, as an anode material for LIBs, the
sandwiched Fe<sub>2</sub>P/GCS presents high specific capacity and
excellent cyclability and rate capability. As a consequence, the acquired
Fe<sub>2</sub>P/GCS is a promising material for energy applications,
especially HER and LIBs
Ultrathin Two-Dimensional Free-Standing Sandwiched NiFe/C for High-Efficiency Oxygen Evolution Reaction
A NiFe-based
compound is considered one of the most promising candidates for the
highest oxygen evolution reaction (OER) electrocatalytic activities
among all nonprecious metal-based electrocatalysts. In this report,
a unique catalyst of free-standing sandwiched NiFe nanoparticles encapsulated
by graphene sheets is first devised and fabricated. In this method,
we use low-cost, sustainable, and environmentally friendly glucose
as a carbon source, ultrathin Fe-doped NiÂ(OH)<sub>2</sub> nanosheets
as a precursor, and a sacrificial template. This special nanoarchitecture
with a conductive network around active catalysts can accelerate electron
transfer and prevent NiFe nanoparticles from aggregation and peeling
off during long-time electrochemical reactions, thereby exhibiting
an excellent OER activity and stability in basic solutions. In this
work, our sandwiched catalyst presents well activities of a low onset
of ∼1.44 V (vs RHE) and Tafel slope of ∼30 mV/decade
in 1 M KOH at a scan rate of 5 mV/s
Uniquely Monodispersing NiFe Alloyed Nanoparticles in Three-Dimensional Strongly Linked Sandwiched Graphitized Carbon Sheets for High-Efficiency Oxygen Evolution Reaction
Oxygen evolution reaction (OER) is
known to have a significant
role in renewable energy. Herein, we report a low-cost, highly active,
and superbly durable three-dimensional (3D) sandwiched NiFe/C arrays
grown on Ni foam by a general procedure. This special structure, with
both graphitized carbon and Ni foam, possesses a huge specific surface
area, high electroconductivity, and a porous structure, effectively
enhancing electrocatalytic activities for OER. Furthermore, the sandwiched
structure with coupled graphitized carbon sheets encapsulating the
outside can hinder active materials from agglomeration and falling
off during long-term operation, leading to outstanding durability,
even in large temperature ranges
Designed Functional Systems for High-Performance Lithium-Ion Batteries Anode: From Solid to Hollow, and to Core–Shell NiCo<sub>2</sub>O<sub>4</sub> Nanoparticles Encapsulated in Ultrathin Carbon Nanosheets
Binary metal oxides have been considered
as ideal and promising anode materials, which can ameliorate and enhance
the electrochemical performances of the single metal oxides, such
as electronic conductivity, reversible capacity, and structural stability.
In this research, we report a rational method to synthesize some novel
sandwich-like NiCo<sub>2</sub>O<sub>4</sub>@C nanosheets arrays for
the first time. The nanostructures exhibit the unique features of
solid, hollow, and even core–shell NiCo<sub>2</sub>O<sub>4</sub> nanoparticles encapsulated inside and a graphitized carbon layers
coating outside. Compared to the previous reports, these composites
demonstrate more excellent electrochemical performances, including
superior rate capability and excellent cycling capacity. Therefore,
the final conclusion would be given that these multifarious sandwich-like
NiCo<sub>2</sub>O<sub>4</sub>@C composites could be highly qualified
candidates for lithium-ion battery anodes in some special field, in
which good capability and high capacity are urgently required
General and Green Strategy toward High Performance Positive Electrode Materials for Rechargeable Li Ion Batteries with Crop Stalks as the Host Carbon Matrixes
A novel,
simple and universal approach toward the sheetlike carbon
composites is presented here. In the method, an abundant agricultural
byproduct (produced at a rate of 2.2 × 10<sup>7</sup> tons/year
in China), obtained from the sustainable, environmentally friendly
crop stalks,
was used as a porous template for large-scale production of high performance
cathode materials for lithium ion batteries. Owing to the large surface
area, porous structure and small size of the functional particles,
the nanocomposites manifest excellent electrochemical performance.
Furthermore, the porous structure and charge transport property of
the carbon materials can provide an electronic conductive network
and promote the lithium ion extraction/insertion. In particular, the
prepared LiFePO<sub>4</sub>/C composites present a high reversible
capacity of 158 mAh g<sup>–1</sup> after 500 cycles, indicating
crop stalks can be a massive resource for high performance lithium
ion batteries
Hierarchical Molybdenum Nitride Nanochexes by a Textured Self-Assembly in Gas–Solid Phase for the Enhanced Application in Lithium Ion Batteries
Self-assembly, as one kind of general phenomenon, has often been reported in solution chemistry. However, in gas–solid phase, it seldom has been disclosed. The MoN nanochex exhibits unique geometrical shape. Its body segment is composed of textured single crystal MoN nanowires, while its edges parallel to [1̅22̅] direction are attached by nanowires whose crystal orientation is different from that of the body segment. In this paper, the structure of the MoN nanochex is studied, and accordingly, a possible growth mechanism is proposed. We expect to extend this method to designed synthesis of many other functional materials, such as nitrides, carbides, and borides, and thereby to significantly tailor their resulting properties. Meanwhile, as one promising electrode material for Li-ion batteries (LIBs), MoN nanochex on Ti foil has been applied in the electrochemical energy storage, and stably delivered a specific capacity of 720 mAh/g with a remarkable Coulombic efficiency up to 98.5%, implying an achieved synergic effect derived from both mesoporous structure and the direct contact with the conducting substrate
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