Huizhou King Brother Electronic Technology Co.

Huizhou, China

Huizhou King Brother Electronic Technology Co.

Huizhou, China
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Xiao Y.,Guangdong University of Technology | Zhan G.,Guangdong University of Technology | Fu Z.,Guangdong University of Technology | Pan Z.,Guangdong University of Technology | And 5 more authors.
Electrochimica Acta | Year: 2014

By the combination of solvothermal alcoholysis and post-nitriding method, titanium nitride nanotubes (TiN NTs), with high surface area, hollow and interior porous structure are prepared successfully and used at a support for Pt nanoparticles. The TiN NTs supported Pt (Pt/TiN NTs) catalyst displays enhanced activity and durability towards methanol oxidation reaction (MOR) compared with the commercial Pt/C (E-TEK) catalyst. X ray diffraction (XRD), nitrogen adsorption/desorption, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) measurements are performed to investigate the physicochemical properties of the synthesized catalyst. SEM and TEM images reveal that the wall of the TiN NTs is porous and Pt nanoparticles supported on the dendritic TiN nanocrystals exhibit small size and good dispersion. Effects of inherent corrosion-resistant, tubular and porous nanostructures and electron transfer due to the strong metal-support interactions of TiN NTs contribute to the enhanced catalytic activity and stability of Pt/TiN NTs towards the MOR. © 2014 Elsevier Ltd.


Pan Z.,Guangdong University of Technology | Luo J.,Guangdong University of Technology | Tian X.,Guangdong University of Technology | Wu S.,Huizhou King Brother Electronic Technology Co. | And 5 more authors.
Journal of Alloys and Compounds | Year: 2014

Al doped ZnO, Al-Sn co-doped ZnO and Al-F co-doped ZnO nanocrystals were successfully synthesized onto glass substrates by the sol-gel method. The structure and morphology of the films are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The results indicated that all the films were polycrystalline with a hexagonal wurtzite structure and exhibited a c-axis preferred orientation. The electrical and optical properties were also investigated by 4-point probe device and Uv-vis spectroscopy, room temperature photoluminescence (PL) and Raman spectrum (Raman), respectively. The PL and Raman results suggested that the co-doped films with a very low defect concentration and exhibit a better crystallinity than AZO thin films. The XPS study confirmed the incorporation of Al, Sn and F ions in the ZnO lattice. © 2013 Elsevier B.V. All rights reserved.


Pan Z.,Guangdong University of Technology | Xiao Y.,Guangdong University of Technology | Fu Z.,Guangdong University of Technology | Zhan G.,Guangdong University of Technology | And 4 more authors.
Journal of Materials Chemistry A | Year: 2014

We describe a route to the development of robust non-carbon TiN nanotubes (TiN NTs) used as a support for Pt, and the catalyst exhibits high activity and stability for the oxygen reduction reaction (ORR). The accelerated durability test (ADT) reveals that the novel supporting material can dramatically enhance the durability of the catalyst and maintain the electrochemically active surface area (ECSA) of Pt, which shows great improvement in ECSA loss with 77% of the initial ECSA remaining even after 12000 ADT cycles, which is much higher than the commercial Pt/C (E-TEK) catalyst. The experimental data verified the strong metal/support interaction between Pt nanoparticles (NPs) and the TiN NTs support. The surface of the TiN NTs is composed of dendrite nanocrystals, which may function as 'hunters' for re-capture and re-nucleation of the Pt species (atoms or clusters) that would dissolve into the electrolyte, which prevents leaching and migrating of dissolved Pt NPs. This new approach opens a reliable path for designing various TiN NT-supported catalysts for a wide range of applications in energy conversion processes. This journal is © the Partner Organisations 2014.


Pan Z.,Guangdong University of Technology | Xiao Y.,Guangdong University of Technology | Tian X.,Guangdong University of Technology | Wu S.,Huizhou King Brother Electronic Technology Co. | And 5 more authors.
Materials Science in Semiconductor Processing | Year: 2014

Al-F co-doped ZnO (AFZO) nanocrystals were successfully synthesized onto glass substrates by the sol-gel method and the structure and morphology of the films as a function of annealing temperature were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicated that all the films were polycrystalline with a hexagonal wurtzite structure and exhibited a c-axis preferred orientation. The XPS study confirmed that co-doping ions are successfully incorporated into the ZnO nanostructure. AFZO thin films annealed at 500 C exhibited the lowest resistivity due to the higher carrier concentration and mobility. The knowledge acquired in this work is important for the AFZO thin films with applications in optoelectronic devices. © 2013 Elsevier Ltd. All rights reserved.


Pan Z.,Guangdong University of Technology | Tian X.,Guangdong University of Technology | Hu G.,Guangdong University of Technology | Xiao C.,Guangdong University of Technology | And 4 more authors.
Materials Science in Semiconductor Processing | Year: 2013

Al-Sn co-doped ZnO thin films were deposited onto quartz substrates by sol-gel processing. The surface morphology and electrical and optical properties were investigated at different annealing temperatures. The surface morphology showed a closely packed arrangement of crystallites in all the doped films. As prepared co-doped films show a preferred orientation along an (0 0 2) plane. This preferred orientation was enhanced by increasing the annealing temperature to between 400 °C and 500 °C, but there was a shift to the (1 0 1) plane when the annealing temperature rose above 500 °C. These samples show, on average, 91.2% optical transmittance in the visible range. In this study, the optical band gap of all the doped films was broadened compared with pure ZnO, regardless of the different annealing temperature. The carrier concentration and carrier mobility of the thin films were also investigated. © 2012 Elsevier Ltd. All rights reserved.


Pan Z.,Guangdong University of Technology | Tian X.,Guangdong University of Technology | Wu S.,Huizhou King Brother Electronic Technology Co. | Xiao C.,Guangdong University of Technology | And 4 more authors.
Superlattices and Microstructures | Year: 2013

Al, Sn doped ZnO nanocrystals were successfully synthesized onto glass substrates by the sol-gel processing. The structure and morphology of crystals were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The effects of various doping concentrations on electrical and optical properties were investigated by 4-point probe device and UV-VIS spectroscopy, respectively. The carrier concentration and carrier mobility of the doped ZnO thin films were also calculated and discussed. The lowest resistivity, 2 × 10-3 Ω cm, was observed for Sn doped ZnO (TZO) thin films with Sn doping concentration of 2 at.%, with an average optical transmittance of 89.2% in the visible range. As to Al doped ZnO (AZO) thin films, the lowest resistivity was of 9 × 10 -2 Ω cm, with a higher average transmittance (91.4%) obtained from the sample with Al doping concentration of 1 at.%. The X-ray photoelectron spectroscopy (XPS) study showed Al-O and Sn-O bonding in the synthesized ZnO thin films, which confirmed the substitution of Zn2+ by Al and Sn ions. Room temperature photoluminescence was observed for pure and Al, Sn doped ZnO thin films and the origin of the emissions was discussed. © 2012 Elsevier Ltd. All rights reserved.


Pan Z.,Guangdong University of Technology | Tian X.,Guangdong University of Technology | Wu S.,Huizhou King Brother Electronic Technology Co. | Yu X.,Guangdong University of Technology | And 5 more authors.
Applied Surface Science | Year: 2013

Al-Sn co-doped ZnO (ATZO) nanocrystals were successfully synthesized onto glass substrates by the sol-gel processing. The structure and morphology of the films are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The results indicated that co-doped ZnO films showed a preferred orientation toward the c-axis and the full width at half maximum (FWHM) of the (0 0 2) plane increased first and then decreased, reaching a minimum of about 0.213 with Sn concentration of 2%. The effects of various Sn concentrations on electrical and optical properties were also investigated by 4-point probe device and ultraviolet-visible (UV-vis) spectroscopy, respectively. The X-ray photoelectron spectroscopy (XPS) study showed SnO and AlO bonding in the synthesized co-doped ZnO thin films, which confirmed the substitution of Zn2+ by Sn and Al ions. Room temperature photoluminescence (PL) was observed for pure and co-doped ZnO thin films and the origin of these emissions was discussed. © 2012 Elsevier B.V. All rights reserved.


Zhan G.,Guangdong University of Technology | Fu Z.,Guangdong University of Technology | Sun D.,Guangdong University of Technology | Pan Z.,Guangdong University of Technology | And 5 more authors.
Journal of Power Sources | Year: 2016

Titanium cobalt nitride (TiCoN)–CNTs hybrid support is prepared by a facile and efficient method, including a one-pot solvothermal process followed by a nitriding process, and this hybrid support is further decorated with Pt nanoparticles to catalyze the oxidation of methanol. The catalyst is characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical measurements. Notably, Pt/CNTs@TiCoN catalyst exhibits a much higher mass activity and durability than that of the conventional Pt/C (JM) for methanol oxidation. The experimental data indicates that the CNTs@TiCoN hybrid support combines the merits of the CNTs's high conductivity and the superb corrosion resistance of external TiCoN coating. © 2016 Elsevier B.V.


Xiao Y.,Guangdong University of Technology | Zhan G.,Guangdong University of Technology | Fu Z.,Guangdong University of Technology | Pan Z.,Guangdong University of Technology | And 5 more authors.
Journal of Power Sources | Year: 2015

Abstract We describe a facile route to the development of novel robust non-carbon titanium cobalt nitride (Ti0.9Co0.1N) used as a support for Pt, and the catalyst exhibits high activity and stability for the oxygen reduction reaction (ORR). XRD and TEM results show that the synthesized Ti0.9Co0.1N is formed as a single-phase solid solution with high purity. The XPS measurements verified the strong metal/support interaction between Pt nanoparticles (NPs) and the Ti0.9Co0.1N support. Most importantly, Ti0.9Co0.1N supported Pt catalyst (Pt/Ti0.9Co0.1N) exhibits a much higher mass activity and durability than that of the commercial JM Pt/C electrocatalyst for ORR. The accelerated durability test (ADT) reveals that the novel Ti0.9Co0.1N support can dramatically enhance the durability of the catalyst and maintain the electrochemical surface area (ECSA) of Pt. Pt/Ti0.9Co0.1N shows great improvement in ECSA preservation, with only 35% of the initial ECSA drop even after 10 000 ADT cycles. The experimental data indicate that the electronic structure of Pt can be modified by Co doping, and there exists a strong interaction between Pt and the Ti0.9Co0.1N support, both of them are playing an important role in improving the activity and durability of the Pt/Ti0.9Co0.1N catalyst. © 2015 Elsevier B.V. All rights reserved.


Xiao Y.,Guangdong University of Technology | Fu Z.,Guangdong University of Technology | Zhan G.,Guangdong University of Technology | Pan Z.,Guangdong University of Technology | And 5 more authors.
Journal of Power Sources | Year: 2015

Titanium molybdenum nitride (Ti0.8Mo0.2N) hybrid support is prepared by a facile and efficient method, including a one-pot solvothermal process followed by a thermal treatment under ammonia at 750 °C, and this hybrid support is further decorated with Pt nanoparticles to catalyze the oxidation of methanol. The catalyst is characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical measurements. XRD and TEM results show that the synthesized Ti0.8Mo0.2N is formed as a single-phase solid solution with high purity. Notable, Ti0.8Mo0.2N supported Pt catalyst exhibits a much higher mass activity and durability than that of the conventional Pt/C (E-TEK) electrocatalysts for methanol electrooxidation. The experimental data indicates that the Mo doping has the bifunctional effect that improves the performance and durability of the supported Pt NPs by inducing both co-catalytic and electronic effects. © 2014 Elsevier B.V. All rights reserved.

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