负载型Ni-Co-P/CNFs催化剂的制备及释氢性能

李忠; 王丽娜; 王桂雪; 谢广文

负载型Ni-Co-P/CNFs催化剂的制备及释氢性能

青岛科技大学材料科学与工程学院, 山东青岛 266042

基金项目: 山东省自然科学基金(ZR2011EMM005)。

详细信息

通讯作者:
谢广文,Tel:0532-84022883;E-mail:xiegw@qust.edu.cn。

中图分类号: TQ153.2
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- 文章访问数: 398
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- 被引次数: 0
出版历程
- 收稿日期: 2014-08-13
- 刊出日期: 2015-03-30

Hydrogen generation from the hydrolysis of sodium borohydride solution over the supported Ni-Co-P/CNFs catalysts

College of Material Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

摘要

摘要: 以纳米碳纤维(CNFs)为基体材料,采用化学镀法在CNFs表面沉积了Ni-Co-P催化剂。研究了催化剂用量,硼氢化钠、氢氧化钠浓度,温度等对碱性硼氢化钠溶液水解释氢的影响。电感耦合等离子体原子发射光谱法(ICP-AES)测试得出负载型Ni-Co-P催化剂含镍13.30%(质量分数,下同)、钴82.25%、磷4.45%。硼氢化钠水解释氢实验结果表明,产氢速率与催化剂用量呈线性关系。当温度为45 ℃、催化剂浓度为7.5 g/L、氢氧化钠浓度为5%、硼氢化钠浓度为2.5%时,氢气释放速率达到最大值18.044 L/(g·min)。通过对负载型催化剂Ni-Co-P/CNFs催化碱性硼氢化钠溶液释放氢气动力学研究表明,该催化剂的活化能E_a为51.57 kJ/mol。
- 化学镀 /
- 镍-钴-磷 /
- 纳米碳纤维 /
- 硼氢化钠 /
- 氢气释放
Abstract: The Ni-Co-P catalysts supported on carbon nanofibers (CNFs) were prepared via electroless deposition; the mass fractions of nickel, cobalt and phosphorus in Ni-Co-P layer are 13.30%, 82.25% and 4.45%, respectively, as determined by ICP-AES. The effects of catalyst amount, sodium borohydride and sodium hydroxide concentrations and reaction temperature on the rate of hydrogen generation in the hydrolysis of alkaline NaBH₄ solution were investigated. The results indicated that the rate of hydrogen generation is proportional to the used catalyst amount; a maximum hydrogen generation rate of 18.044 L/(g·min) is achieved at 45 ℃ by hydrolysis of 2.5% NaBH₄ solution containing 5% NaOH and 7.5 g/L Ni-Co-P/CNFs catalyst with a Ni-Co-P loading of 18.127%. Moreover, a kinetic study shows that the activation energy for the hydrolysis of alkaline NaBH₄ solution under those conditions is 51.57 kJ/mol.
- electroless deposition /
- nickel-cobalt-phosphorus /
- carbon nanofibers /
- sodium borohydride /
- hydrogen generation

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