Bacterial cellulose derived carbon as a support for catalytically active Co–B alloy for hydrolysis of sodium borohydride |
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Authors: | Changli Peng Tianshuo Li Yongjin Zou Cuili Xiang Fen Xu Jian Zhang Lixian Sun |
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Affiliation: | 1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials, Guilin 541004, PR China;3. Engineering Research Center of Ministry of Education for Electronic Information Materials and Devices, PR China |
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Abstract: | The fast release of hydrogen from borohydride is highly desired for a fuel cell system. However, the generation of hydrogen from borohydride is limited by the low activity and low stability of the catalyst. Herein, a highly active catalyst is synthesized through a simple one-step chemical reduction using bacterial cellulose (BC) derived carbon as a support for the active Co–B alloy. The morphology and microstructure of the BC/Co–B nanocomposite are characterized by SEM, TEM, XRD, and BET adsorption analysis. The BC/Co–B possesses high surface area (125.31 m2 g?1) high stability and excellent catalytic activity for the hydrolysis of NaBH4. Compared with unsupported Co–B nanocomposite or commercial carbon supported Co–B, the BC/Co–B nanocomposite shows greatly improved catalytic activity for the hydrolysis of NaBH4 with a high hydrogen generation rate of 3887.1 mL min?1 g?1 at 30 °C. An activation energy of 56.37 kJ mol?1 was achieved for the hydrolysis reaction. Furthermore, the BC/Co–B demonstrated excellent stability. These results indicate that the BC/Co–B nanocomposite is a promising candidate for the hydrolysis of borohydrides. |
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Keywords: | Co-B Bacterial cellulose Catalytic activity Hydrolysis |
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