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Showing papers on "Nickel boride published in 2020"



Journal ArticleDOI
TL;DR: It is shown that amorphous NixB has a prominent effect on the modification of ZnxCd1-xS, which provides more ways for the study of photocatalytic H2 evolution.
Abstract: In this work, the rational design of amorphous NixB as a co-catalyst for the modification of ZnxCd1−xS was achieved. First, NixB was prepared by the redox method and ZnxCd1−xS was synthesized by the hydrothermal method. Then, the electrostatic self-assembly method was used to complete the coupling of NixB and ZnxCd1−xS. The experimental results of H2 production showed that when the mass ratio (wt%) of NixB in NixB/ZnxCd1−xS was 7 wt%, it had the highest activity, and the hydrogen production could reach 1521 μmol under irradiation with light for 5 h. The hydrogen production activity of the composite catalyst was 4.75 times higher than that of pure ZnxCd1−xS. The improvement in the photocatalytic activity can be attributed to the following aspects: (i) UV-vis DRS showed that the addition of NixB increased the absorption of visible light; (ii) the PL, TRPL, IT, EIS and LSV experiments further proved that the composite catalyst had excellent photoelectrochemical properties; (iii) the zeta potential results indicated that the electrostatic attraction between NixB and ZnxCd1−xS provided favorable conditions for the rapid transfer of electrons. This work shows that amorphous NixB has a prominent effect on the modification of ZnxCd1−xS, which provides more ways for the study of photocatalytic H2 evolution.

41 citations


Journal ArticleDOI
TL;DR: The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA), an important platform chemical for renewable polymer industry, is receiving increasing intere
Abstract: The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA), an important platform chemical for renewable polymer industry, is receiving increasing intere...

30 citations


Journal ArticleDOI
TL;DR: In this article, iron-doped nickel boride (FexNi1-xB) and NiB were successfully grown on 3D self-supporting graphene (SSG) electrodes via a one-step reduction approach.

14 citations


Journal ArticleDOI
01 Apr 2020-Ionics
TL;DR: Ni-Co-B-MR1 as mentioned in this paper was successfully synthesized via a simple electroless deposition method on stainless steel (SS) gauze substrate and exhibited improved CO tolerance for methanol oxidation reaction (MOR) in alkaline medium.
Abstract: Ni-Co-B catalyst consisting of different ratios of Ni and Co was successfully synthesized via a simple electroless deposition method on stainless steel (SS) gauze substrate. Among various ratios, the Ni-Co-B of the ratio (0.09 M/0.01 M, designated as Ni-Co-B-MR1) exhibited higher electrochemical response towards methanol oxidation in alkaline medium with a highest current density about 11.3 mA/cm2 at a potential of − 0.65 V. The electrode exhibited improved CO tolerance for methanol oxidation reaction (MOR) in alkaline medium. The surface morphology and composition of the SS gauze coated with Ni-Co-B-MR1 catalyst was analysed using SEM and energy dispersive X-ray analysis. XRD confirms the presence of orthorhombic nickel boride and cobalt boride structure. The XPS analysis confirms the active presence of nickel boride and cobalt boride on SS gauze coated with Ni-Co-B-MR1 catalyst. The BET surface area of SS gauze coated with Ni-Co-B-MR1 catalyst was 1.21 m2 g−1. The single direct methanol fuel cell with SS gauze coated with Ni-Co-B-MR1 electrode produces a current density of about 0.1 mA/cm2 and power density about 10 mW/cm2, respectively.

13 citations


Journal ArticleDOI
TL;DR: The selectivity of a facile reductive and extractive desulfurization process was studied and it showed that methylbenzene and olefins had different effects on different sulfur compounds during this desulforization process.
Abstract: The selectivity of a facile reductive and extractive desulfurization process was studied In this desulfurization method, polyethylene glycol was used as the extractant, and sodium borohydride was used as the reductant Several different simulated fuels were prepared by dissolving thiophenic sulfides, methylbenzene and hexylene in octane The results showed that methylbenzene and olefins had different effects on different sulfur compounds during this desulfurization process The extraction and reduction mechanisms were also explained Four factors could affect the desulfurization performance: (1) intermolecular hydrogen bonding: (a) active O bonding with aromatic H or (b) S bonding with H atoms in hydroxide radicals, (2) "like-dissolves-like" interactions between polyethylene glycol and thiophenic sulfides, (3) the methyl steric hindrance effect and the electron density of sulfur atoms, and (4) the combination of S atoms with produced nickel boride to form active desulfurization centres The desulfurization reaction path was also deduced according to the GC/MS results

4 citations


Journal ArticleDOI
Peipei Wang1, Jiali Xing1, Yanfang He1, Yuan Liu1, Ying Yang1, Mingming Chen1, Dawei Cao1 
TL;DR: In this article, the LFO/Ni-B composite electrodes by immersing LFO into the prepared electroless plating solution were optimized to enhance photoelectrochemical performances of LaFeO3.
Abstract: Great efforts have been paid to enhance the photoelectrochemical performances of LaFeO3. However, there have rarely been reported about modifying of LaFeO3 with transitional metal borides for enhanced photoelectrochemical activities. Herein, we prepared LFO/Ni–B composite electrodes by immersing LFO into the prepared electroless plating solution. The optimized LFO/Ni–B composite exhibits a 373% improvement of the photocurrent density and exhibits an anodic shift of onset potential. Systematic studies reveal that the improvement of PEC activity should be attributed to enhanced electrochemically active surface area and electrocatalytic properties, reduced resistance of the PEC system, and a more pronounced downward band bending at the photoelectrode/electrolyte interface.

3 citations


Journal ArticleDOI
TL;DR: In this paper, the microstructure of deposited coatings formed by a composite material based on PG-10N-01 self-fluxing alloy and modified with a mechanically activated composite material obtained as a result of the self-propagating high-temperature sintering process was studied.
Abstract: We study the microstructure of deposited coatings formed by a composite material based on PG-10N-01 self-fluxing alloy and modified with a mechanically activated composite material obtained as a result of the self-propagating high-temperature sintering process. By the X-ray phase diffraction analysis, in the structure of the coating, we detect the presence of titanium diboride (TiB2), nickel boride (Ni3B), titanium oxide (TiO), and iron oxide (Fe3O4) inclusions distributed over the nickel matrix. It is demonstrated that the modifying addition promotes not only the refinement of structure in the course of electric-arc deposition but also the elevation of the levels of hardness and microhardness of the deposited layer and a 1.5-fold increase in the abrasive wear resistance as compared with the wear resistance of PG-10N-01 alloy.

2 citations




OtherDOI
18 Apr 2020

Patent
29 May 2020
TL;DR: In this paper, a nickel boride/boron-doped porous carbon material which is a porous carbon ball with a through hole structure and consists of a plurality of template etching holes is presented.
Abstract: The invention belongs to the field of battery materials, and particularly relates to a nickel boride/boron-doped porous carbon material which is a porous carbon ball with a through hole structure andcomprises a plurality of template etching holes. A carbon skeleton of the porous carbon ball is boron-doped disordered carbon; nickel elementary substance particles coated with graphitized carbon areembedded in the carbon skeleton in situ; and nickel boride nanoparticles are embedded in a surface. The invention also provides a preparation method and an application of the material. Special components and the material with the special in-situ morphology can show excellent conductivity and polysulfide catalytic activity and can show an excellent capacity, rate and cycle performance when being used as a lithium-sulfur battery after being loaded with sulfur.