Mesoporous β-Co(OH)₂ nanowafers and nanohexagonals obtained synchronously in one solution and their electrochemical hydrogen storage properties

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• 作者：Longqiang Wang^a ; Jingyuan Fu^a ; Yue Zhang^a ; ^{zhangyue@ouc.edu.cn} ; Xiaoling Liu^a ; Yansheng Yin^b ; ^{ysyin@shmtu.edu.cn} ; Lihua Dong^b ; Shougang Chen^a ; ^{sgchen@ouc.edu.cn}
• 关键词：β-Co(OH)2 ; Nanowafers ; Nanohexagonals ; Electrochemical hydrogen storage
• 刊名：Progress in Natural Science: Materials International
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：26
• 期：6
• 页码：555-561
• 全文大小：1344 K
• 卷排序：26

文摘

A water/oil two-phase solution strategy has been developed for the synthesis of various β-Co(OH)2 nanostructures. More importantly, two different morphologies of β-Co(OH)2: mesoporous nanowafers and nanohexagons were successfully obtained through one reaction. Furthermore, the special mesoporous of β-Co(OH)2 nanowafers and nanohexagons exhibited excellent electrochemical hydrogen storage capacities and cycling stability. The maximum capacity reached 265.9 and 215.7 mA h g−1 at room temperature, respectively. After 70 cycles, the discharging capacities of the electrode still remain above 218.2 and 175.4 mA h g−1, which indicates that the as-prepared mesoporous β-Co(OH)2 nanowafers have a strong resistance against oxidation and corrosion. These results indicates that the mesoporous β-Co(OH)2 nanowafers and nanohexagons may be potentially applied for electrochemical hydrogen storage.