The preparation of Co9S8 and CoS2 nanoparticles by a high energy ball-milling method and their electrochemical hydrogen storage properties
The preparation of Co9S8 and CoS2 nanoparticles by a high energy ball-milling method and their electrochemical hydrogen storage properties
复制标题
高能球磨法制备Co9S8和CoS2纳米颗粒及其电化学储氢性能
DOI：
10.1016/j.ijhydene.2014.04.061
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发表时间：
2014-06
影响因子：
7.2
通讯作者：
Gao Peng
中科院分区：
文献类型：
--
作者：
Qin Wei;Hu Baoguo;Bao Di;Gao Peng
以钴金属和S粉末为原料，采用球磨法制备了两种不同的储氢性能优良的钴-S化合物Co9S8和CoS2。X射线衍射仪、扫描电子显微镜和透射电子显微镜表明，特定的Co：S摩尔比和球磨速度和次数可以得到纯净的Co9S8和CoS2，从而克服了长期以来无法通过球磨获得纯净的Co-S化合物的问题。恒电流充放电和循环伏安测试表明，Co9S8和CoS2纳米粒子的电化学储氢容量分别提高了1.79%和1.57%，均高于文献报道的结果。此外，基于相应的X射线光电子能谱和循环伏安测试，提出并讨论了两种Co-S化合物的电化学储氢机理。
Two different Co–S compounds with enhanced hydrogen storage properties, Co9S8and CoS2, were prepared by ball-milling mixtures of Co metal and S powder. X-ray diffractometry, scanning electron microscopy and transmission electron microscopy were used to show that specific molar ratios of Co:S and ball-milling speeds and times result in pure Co9S8and CoS2, thus overcoming a long-standing inability to obtain pure Co–S compounds via ball-milling. A galvanostatic charge–discharge process and cyclic voltammetry measurements showed that the as-obtained Co9S8and CoS2nanoparticles have enhanced electrochemical hydrogen storage capacities of 1.79 and 1.57 wt% hydrogen, respectively, which are higher than those previously reported. In addition, based on the corresponding X-ray photoelectron spectroscopy and cyclic voltammetry measurements, a new electrochemical hydrogen storage mechanism for the two Co–S compounds was proposed and discussed.
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影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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