Controllable Assembly and Dehydrogenation Catalysis Activity of Urchinlike FeNi–Ru(tips) Amorphous Alloy Hierarchical Nanostructures
Controllable Assembly and Dehydrogenation Catalysis Activity of Urchinlike FeNi–Ru(tips) Amorphous Alloy Hierarchical Nanostructures
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DOI：
10.1002/cplu.201200297
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发表时间：
2013-04
期刊：
影响因子：
3.4
通讯作者：
Yuzhen Sun;M. Wen;Qingsheng Wu;Qing-Sheng Wu
中科院分区：
文献类型：
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作者：
Yuzhen Sun;M. Wen;Qingsheng Wu;Qing-Sheng Wu
通过可控组装工艺构建了新颖的海胆状FeNi-Ru（tips）分级结构纳米球（直径为9.17 µm）。这种特殊结构的催化剂具有大的表面积和大孔以及更多的活性位点，可以极大地促进反应物的扩散和运输，从而提高反应活性。结合Ru和FeNi纳米材料的优点，所得海胆状FeNi-Ru（tips）纳米球在室温常压下对NaBH 4水溶液的水解脱氢反应表现出优异的催化活性，脱氢速率为2245.87 mL min−1 g−1，其中Fe 19 Ni 76-Ru 5表现出最佳的脱氢反应活性，活化能较低（41.57 kJ mol−1）。此外，这些新结构的纳米合金通过调节Fe、Ni和Ru的摩尔含量呈现可控的铁磁行为。
Novel, urchinlike FeNi–Ru(tips) hierarchical-structured nanospheres (≈9.17 µm) were constructed through a controllable assembly process. Offering large surface areas and macropores as well as more active sites, this special structured catalyst can greatly facilitate reactant diffusion and transport to promote reactivity. By combining the advantages of Ru and FeNi nanomaterials, the resultant urchinlike FeNi–Ru(tips) nanospheres exhibit excellent catalytic activity with the dehydrogenation rate of 2245.87 mL min−1 g−1 toward the hydrolytic dehydrogenation of aqueous NaBH4 under ambient atmosphere at room temperature, in which Fe19Ni76–Ru5 shows the best dehydrogenation reactivity with low activation energy (41.57 kJ mol−1). Additionally, these new structured nanoalloys present controllable ferromagnetic behavior by means of adjusting the molar content of Fe, Ni, and Ru.