Mechanical alloying preparation of fullerene-like Co3C nanoparticles with high hydrogen storage ability
Mechanical alloying preparation of fullerene-like Co3C nanoparticles with high hydrogen storage ability
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DOI：
10.1016/j.ijhydene.2012.07.133
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发表时间：
2012-11
影响因子：
7.2
通讯作者：
Peng Gao;Ying Wang;S. Y. Yang;Yujin Chen;Zhu Xue;Longqiang Wang;Guobao Li;Yuzeng Sun
中科院分区：
文献类型：
--
作者：
Peng Gao;Ying Wang;S. Y. Yang;Yujin Chen;Zhu Xue;Longqiang Wang;Guobao Li;Yuzeng Sun
采用不同Co/GE质量比的Co和石墨烯（GE）粉末直接球磨法制备了类富勒烯正交结构的Co3C纳米颗粒。电化学测试表明，Co3C纳米颗粒具有优异的电化学储氢能力，室温常压下最大储氢容量可达1415 mA h/g （5.176 wt%氢气）。研究了不同Co3C电极的反应机理及产生差异的原因。结果表明，Co3CHx/Co3C反应均以准可逆反应为主。
Fullerene-like orthorhombic-structured Co3C nanoparticles have been synthesized by direct ball-milling of Co and graphene (GE) powders with different Co/GE weight ratios. Electrochemical measurements showed that the Co3C nanoparticles displayed excellent electrochemical hydrogen storage capacities and the maximum capacity reached 1415 mA h/g (5.176 wt% hydrogen) at room temperature and ambient pressure. The reaction mechanism and the reasons for the differences of the Co3C electrodes were also investigated. It was found that the quasi-reversible Co3CHx/Co3C reaction was dominant for all the Co3C electrodes.