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Enhanced hydrogen storage kinetics of nanocrystalline and amorphous Mg_2N-type alloy by substituting Ni with Co 被引量:7
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作者 张羊换 宋春红 +3 位作者 任慧平 李志刚 胡锋 赵栋梁 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第9期2002-2009,共8页
In order to improve the hydrogen storage kinetics of the Mg2Ni-type alloys, Ni in the alloy was partially substituted with element Co. The Mg2Ni-type Mg2Ni1-xCox (x=0, 0.1, 0.2, 0.3, 0.4) alloys were fabricated by m... In order to improve the hydrogen storage kinetics of the Mg2Ni-type alloys, Ni in the alloy was partially substituted with element Co. The Mg2Ni-type Mg2Ni1-xCox (x=0, 0.1, 0.2, 0.3, 0.4) alloys were fabricated by melt-spinning technique. The structures of the as-spun alloys were characterized by XRD and TEM. The gaseous and electrochemical hydrogen storage kinetics of the alloys was measured. The results show that the substitution of Co for Ni notably enhances the glass forming ability of the Mg2Ni-type alloy. The amorphization degree of the alloys visibly increases with rising of Co content. Furthermore, the substitution of Co for Ni significantly improves the hydrogen storage kinetics of the alloys. With an increase in the amount of Co substitution from 0 to 0.4, the hydrogen absorption saturation ratio of the as-spun (15 m/s) alloy increases from 81.2% to 84.9%, the hydrogen desorption ratio from 17.60% to 64.79%, the hydrogen diffusion coefficient increases from 1.07×10-11 to 2.79×10-11 cm2/s and the limiting current density increases from 46.7 to 191.7 mA/g, respectively. 展开更多
关键词 Mg2Ni-type alloy substituting Ni with Co melt spinning hydrogen storage kinetics
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Development of palladium-catalyzed Suzuki carbonylation reaction without external ligand and its application in modification of novel series of α7 nAChR PAMs
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作者 Ying Meng Wenxing Zou +6 位作者 Zongze Huang Xintong Wang Wenxuan Jiao Wenjun Xie Xiling Bian KeWei Wang Qi Sun 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2018年第7期460-468,共9页
Palladium-catalyzed Suzuki carbonylation with CHCl3 as carbonylative reagent was realized without external ligands. Different substituted benzophenones were explored via the coupling reaction of aryl iodides, arylboro... Palladium-catalyzed Suzuki carbonylation with CHCl3 as carbonylative reagent was realized without external ligands. Different substituted benzophenones were explored via the coupling reaction of aryl iodides, arylboronic acids and CHCl3 as a CO surrogate in moderate to good yields. This method was also successfully applied to the structure modification of α7 nicotinic acetylcholine receptor positive allosteric modulators(α7 nAChR PAMs) based on the preliminary structure-activity relationship. 展开更多
关键词 Carbonylation reaction Palladium-catalysis BENZOPHENONES CO surrogate
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