Co–Fe–B nanofilaments as high-performance catalysts for hydrogen generation from the hydrolysis of NaBH4 solution
Co–Fe–B nanofilaments as high-performance catalysts for hydrogen generation from the hydrolysis of NaBH4 solution
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DOI：
10.5004/dwt.2022.28443
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发表时间：
2022
影响因子：
1.1
通讯作者：
Hong-Hua Chen;Xue Wang;Dina Zhang;Yifan Wu;Kecheng Zhang;Z. Cao;Shiwei Wu;K. Qi;Yan Wang;Guode Li;YU Peng
中科院分区：
文献类型：
--
作者：
Hong-Hua Chen;Xue Wang;Dina Zhang;Yifan Wu;Kecheng Zhang;Z. Cao;Shiwei Wu;K. Qi;Yan Wang;Guode Li;YU Peng
硼氢化钠（NaBH 4）水解制氢技术在过去的十年中得到了广泛的关注，但由于贵金属催化剂的价格昂贵和资源有限而受到限制。本文在Cu片上制备了无贵金属的Co-Fe-B催化剂，降低了成本，满足了实际应用的需要。当pH值为12.0时，合成的Co-Fe-B催化剂呈丝状结构，在反应界面上提供了更多的接触面积和活性中心。与二元Co-B和Fe-B材料相比，三元Co-Fe-B纳米丝对NaBH 4水解脱氢反应具有良好的催化性能。Co Fe B催化剂在25°C下的催化产氢速率（HGR）可达9408.9 mL min-1 g-1。在相同条件下，HGR值比Co-B高1.5倍，比Fe-B高2.6倍。NaBH 4的水解过程与催化剂的加入量无关，属于零级反应。这项工作揭示了不同元素之间的协同作用和独特的微观结构对设计高性能催化剂的重要作用。
The strategy of hydrogen generation from sodium borohydride (NaBH 4 ) hydrolysis has obtained extensive attention in the past decade, but it is restrained by the high cost and limited abundance for the used noble metal catalysts. Herein, we prepare noble-metal-free Co–Fe–B catalysts on Cu sheet, which can reduce the cost to satisfy the demand of practical application. The as-synthesized high-performance Co–Fe–B catalysts show filamentous structure by optimizing pH value to 12.0, providing more contact areas and active sites on reaction interface. Compared with the binary Co–B and Fe–B materials, the ternary Co–Fe–B nanofilaments exhibit good catalytic performance for dehydrogenation from the NaBH 4 hydrolysis. The catalyzed hydrogen generation rate (HGR) of Co–Fe–B can achieve 9,408.9 mL min –1 g –1 at 25°C. The HGR value is 1.5 times higher than Co–B and 2.6 times higher than Fe–B under the same condition. Moreover, the result suggests that NaBH 4 hydrolysis process is independent of the amount of added catalysts, which means that it is a zero-order reaction. This work sheds light on the vital role of the cooperative action between different elements and the unique microstructure for designing high-performance catalysts.