酵母菌模板辅助合成Co3O4空心微球催化NaBH4水解制氢

doi:10.15541/jim20170358

摘要/Abstract

摘要：

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。

关键词: 制氢, 硼氢化钠, Co₃O₄, 酵母菌, 模板法

Abstract:

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.

Key words: hydrogen generation, sodium borohydride, Co₃O₄, yeast, template method

中图分类号:

O69
TK91

魏磊, 马麦霞, 卢艳红, 王东升, 张素玲, 赵娣, 马卫攀. 酵母菌模板辅助合成Co₃O₄空心微球催化NaBH₄水解制氢[J]. 无机材料学报, 2018, 33(6): 648-652.

WEI Lei, MA Mai-Xia, LU Yan-Hong, WANG Dong-Sheng, ZHANG Su-Ling, ZHAO Di, MA Wei-Pan. Hydrogen Generation from Hydrolysis of Sodium Borohydride Using Co₃O₄ Hollow Microspheres Synthesized with Yeast Template[J]. Journal of Inorganic Materials, 2018, 33(6): 648-652.

图/表 7

图1 (a)酵母菌, (b)~(d)Co3O4-HM和(e)~(f)Co3O4-NT的FE-SEM微观形貌

Fig. 1 FE-SEM micrographs of (a) yeast, (b)-(d) Co3O4-HM and (e)-(f) Co3O4-NT

图2 所制备催化剂的等温吸附曲线

Fig. 2 Adsorption isotherms of the prepared catalysts

图3 所制备两种催化剂的XRD图谱

Fig. 3 XRD patterns of the prepared catalysts

图4 不同温度下Co3O4-HM和Co3O4-NT催化产氢性能

Fig. 4 Hydrogen generation performance of the prepared Co3O4-HM and Co3O4-NT at different temperatures

图5 NaBH4含量对Co3O4-HM催化性能的影响(25℃)

Fig. 5 Effect of NaBH4 concentration on the catalytic performance of the as-prepared Co3O4-HM (25℃)

图6 Co3O4-HM长期储存性能测试结果(25℃)

Fig. 6 Catalytic performance of the Co3O4-HM (25℃) for long-term storage

表1 所制备Co3O4催化剂与文献中催化剂性能对比

Table 1 Performance comparison of the prepared Co3O4 in this work with some catalysts reported in literature

Catalyst	NaBH₄/wt%	NaOH/wt%	Temperature/℃	HGR/(mL·min^-1·g^-1)	Ref.
Ru/IRA 400	20	10	25	189	[17]
Ru/Graphite	10	5	30	969	[15]
Pt/Pd-CNT	0.1	0.4	29	126	[18]
CoB/C	0.75	8.00	25	2073	[19]
CoP/Cu	10	1	30	954	[20]
Co-Cu-B	0.95	1.00	25	2210	[21]
PtRu-LiCoO₂	5	5	25	2400	[16]
Co₃O₄	0.6	5.0	20	1930	[8]
Co₃O₄	2	- ^a	25	1497	[11]
Co₃O₄-HM	10	2	20	1360	This work
			25	2140	This work
			30	3115	This work

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酵母菌模板辅助合成Co₃O₄空心微球催化NaBH₄水解制氢

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

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