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Wang D.,Central South University | Wang D.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | Zhang D.,Central South University | Tang C.,Central South University | And 4 more authors.
Catalysis Science and Technology | Year: 2016

Co-promoted molybdenum phosphide nanoparticles have been successfully prepared and explored for the first time as a cost-effective electrocatalyst for hydrogen evolution reaction (HER). The as-developed catalyst demonstrates excellent HER activity with a small Tafel slope of 50 mV dec-1 which is among the best records reported for MoP-based catalysts. The addition of Co not only reduces the particle size of the MoP-based catalyst and promotes the charge transfer, but also enhances the intrinsic activity of each active site, paving the way for optimizing the HER performances of ternary or multiple transition metal phosphide catalysts. © The Royal Society of Chemistry 2016. Source


Wang Y.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | Wang Y.,Key Laboratory of Hunan Province for Metallurgy and Material Processing of Rare Metals | Wang Y.,Central South University | Wang D.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | And 9 more authors.
International Journal of Refractory Metals and Hard Materials | Year: 2012

2.0 wt.% MoSi 2/rare earth oxide doped molybdenum alloys were prepared by powder metallurgy processing followed by hot rolling processing and final stress relieving processing. Microstructure of molybdenum alloys shows elongated structure and fine distributions of composite particle. Compared with unalloyed molybdenum, the addition of MoSi 2/rare earth oxide causes great improvement in the mechanical properties of molybdenum, especially its tensile strength at high temperature. © 2011 Published by Elsevier Ltd. All rights reserved. Source


Wang Y.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | Wang Y.,Key Laboratory of Hunan Province for Metallurgy and Material Processing of Rare Metals | Wang Y.,Central South University | Wang D.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | And 9 more authors.
Materials Science and Engineering A | Year: 2012

The effect of MoSi 2/La 2O 3/Y 2O 3 (SiLY) composite particle on microstructure and mechanical properties of sintered molybdenum was surveyed in this research. The SiLY was obtained by mechanical milling and then doped into molybdenum by the solid-solid method. The sintered molybdenum (MSiLY) with the addition of SiLY was prepared via the process of powder metallurgy. X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), optical microscope (OM), scanning electron microscopy (SEM), mechanical properties' testing were carried out to characterize the samples. The EDS results showed that elements of the SiLY in sintered molybdenum are composed of O, La, Si, Y and Mo. Microstructural observations showed that the MSiLY has a fine equiaxed grain, and SiLY dispersively distributed in grain interior and at grain boundary. Mechanical properties of sintered molybdenum have been improved significantly by the addition of SiLY. The fine grain structure and the particles distributed in the matrix can improve strength and toughness of sintered molybdenum. © 2012 Elsevier B.V. Source


Wang D.,Central South University | Wang D.,Key Laboratory of Ministry of Education for Non ferrous Materials Science and Engineering | Zhang X.,Central South University | Shen Y.,Central South University | And 2 more authors.
RSC Advances | Year: 2016

The replacement of Pt with cheap metal electrocatalysts with high efficiency and superior stability for the hydrogen evolution reaction (HER) remains a great challenge. Furthermore, the optimization of MoS2 electrocatalysts has attracted much attention. In this work, we report a simple strategy to enhance the HER ability of MoS2 catalysts via the doping of nickel. With the doping of a small amount of nickel, the MoS2 catalyst shows more electrochemical active sites, higher turnover frequency over each active site and better conductivity, resulting in excellent HER activity with a small Tafel slope of 47 mV dec-1, making it a promising HER electrocatalyst for practical applications. © The Royal Society of Chemistry 2016. Source

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