酵母菌模板辅助合成Co3O4空心微球催化NaBH4水解制氢

预先在酵母菌模板表面沉积Co(OH)₃, 经高温煅烧后成功制得Co₃O₄空心微球, 并作为前驱体催化NaBH₄水解制氢。通过场发射扫描电镜(FE-SEM)和X射线衍射(XRD)进行样品的微观形貌和物相分析。研究结果表明, 当反应液中NaBH₄含量为10wt%时, 模板法制备的Co₃O₄空心微球催化产氢速率高达2140 mL/(min•g) (25℃), 约是同等条件下无模板制备Co₃O₄活性的9倍, 且所制备的Co₃O₄空心微球长期储存性能良好。

Hydrogen Generation from Hydrolysis of Sodium Borohydride Using Co3O4 Hollow Microspheres Synthesized with Yeast Template

Co(OH)₃ was firstly deposited on the surface of yeast template, and then Co₃O₄ hollow microspheres (denoted as Co₃O₄-HM) were successfully achieved by calcination. Co₃O₄-HM were employed as catalyst precursor for hydrogen generation from the hydrolysis of sodium borohydride. Field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were used for morphology and phase analyses, respectively. When NaBH₄ concentration is 10wt% in alkaline solution, the as-synthesized Co₃O₄-HM present high hydrogen generation rate up to 2140 mL/(min·g) at 25℃, which is almost nine times of that of Co₃O₄ synthesized without yeast template at the same condition. Furthermore, the Co₃O₄-HM show excellent stability for long-term storage.