Controlled synthesis of nanostructured Co film catalysts with high performance for hydrogen generation from sodium borohydride solution

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• 作者：Hao Li^a ; ^b ; ^{lihao180@126.com} ; Jinyun Liao^a ; Xibin Zhang^a ; Weiwen Liao^a ; Lili Wen^a ; Jingbo Yang^a ; Hui Wang^c ; Rongfang Wang^b ; ^c ; ^{wrf38745779@126.com} ; ^{wangrf@nwnu.edu.cn}
• 关键词：Nanostructure ; Catalysts ; Co film ; Hydrogen generation ; Controlled synthesis
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：239
• 期：Complete
• 页码：277-283
• 全文大小：2382 K

文摘

As a representative catalyst for the hydrolysis of NaBH₄ to produce hydrogen, nanostructured Co has received intensive attention owing to its high catalytic activity and low cost. In this study, nanostructured Co films supported on Cu foils are fabricated by a facile and cost effective magnetic-field-induced chemical reduction method. By controlling the synthetic conditions, Co films composed of nanoplatelets, nanosheets and microspheres are successfully obtained. It is found that the as-prepared nanostructured Co film catalysts exhibit high performance in the hydrolysis of sodium borohydride. The rate constant/apparent activation energy of NaBH₄ hydrolysis in the presence of these Co film catalysts is 1.27?mL?min^?1?cm^?2/28.4?kJ?mol^?1, 0.96?mL?min^?1?cm^?2/27.6?kJ?mol^?1 and 0.85?mL?min^?1?cm^?2/34.3?kJ?mol^?1, respectively. Interestingly, Co film composed of nanoplatelets shows only ca. 10 % catalytic activity loss after 10 cycles, which exhibits much improved reusability and durability in contrast to those Co catalysts reported in the literature.