高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (10): 2164-2169.doi: 10.7503/cjcu20140362

• 物理化学 • 上一篇    下一篇

Pt/Ni/Fe三金属纳米颗粒的制备及催化制氢活性

李文绮1,2, 赵万国1,2, 周兴赟1,2, 苏丽1,2, 张海军1,2(), 鲁礼林3, 张少伟1,2   

  1. 1. 武汉科技大学, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
    2. 武汉科技大学, 材料与冶金学院, 武汉 430081
    3. 武汉科技大学,化学工程与技术学院, 武汉 430081
  • 收稿日期:2014-04-18 出版日期:2014-10-10 发布日期:2014-09-17
  • 作者简介:联系人简介: 张海军, 男, 博士, 教授, 博士生导师, 主要从事金属催化材料研究. E-mail: zhanghaijun@wust.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51272188)、 湖北省自然科学基金重点项目(批准号: 2013CFA086)和湖北省科技支撑计划对外科技合作项目(批准号: 2013BHE002)资助

Fabrication and Catalytic Activity of Pt/Ni/Fe Trimetallic Nanoparticles for Hydrogen Generation from NaBH4

LI Wenqi1,2, ZHAO Wanguo1,2, ZHOU Xingyun1,2, SU Li1,2, ZHANG Haijun1,2,*(), LU Lilin3, ZHANG Shaowei1,2   

  1. 1. The State Key Laboratory of Refractories and Metallurgy
    2. College of Materials and Metallurgy
    3. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
  • Received:2014-04-18 Online:2014-10-10 Published:2014-09-17
  • Contact: ZHANG Haijun E-mail:zhanghaijun@wust.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51272188), the Natural Science Foundation of Hubei Province, China(No.2013CFA086) and the Foreign Cooperation Projects in Science and Technology of Hubei Province, China(No.2013BHE002)

摘要:

采用化学共还原方法制备了聚乙烯吡咯烷酮(PVP)保护的Pt/Ni/Fe三金属纳米颗粒, 对所合成的纳米颗粒进行了表征, 研究了三金属纳米颗粒的化学组成对其催化NaBH4制氢的影响. 研究结果表明, Pt/Ni/Fe三金属纳米颗粒的平均粒径在2 nm左右, Pt/Ni/Fe三金属纳米颗粒催化活性高于Pt, Ni或Fe单金属纳米颗粒和Pt/Ni, Pt/Fe或Ni/Fe双金属纳米颗粒的催化活性, 其中Pt10Ni78.75Fe11.25三金属纳米颗粒的催化活性最高, 30 ℃时, 其催化活性可达63.920×103 molH2/(molPt·h). Pt/Ni/Fe三金属纳米溶胶催化剂具有很好的催化稳定性, 10次重复催化实验后, 该催化剂依然可以保持较高的催化活性. 该三金属纳米溶胶催化NaBH4水解反应的活化能为52 kJ/mol.

关键词: Pt/Ni/Fe三金属纳米颗粒, NaBH4水解制氢, 催化活性, 聚乙烯吡咯烷酮

Abstract:

Poly-(N-vinyl-2-pyrrolidone)(PVP)-protected Pt/Ni/Fe trimetallic nanoparticles(TNPs) were prepared using a chemical co-reduction method. The obtained TNPs were characterized by transmission electron microscopy(TEM). The effects of metal compositions on the hydrolysis reaction of the alkaline NaBH4 solution were studied. The results indicated that the prepared Pt/Ni/Fe TNPs had an average size of 2 nm. The activities of TNPs were much higher than that of Fe, Ni and Pt monometallic nanoparticles(MNPs) and Ni/Fe, Pt/Fe and Pt/Ni bimetallic nanoparticles(BNPs). Among all the synthesized MNPs, BNPs and TNPs, Pt/Ni/Fe TNPs with molar ratio of 10∶78.75∶11.25 displayed the highest catalytic activity, showing a high hydrogen release rate of 63.920×103 molH2/(molPt·h) at 30 ℃. The corresponding apparent activation energy for the hydrolysis reaction of the alkaine NaBH4 solution over the Pt10Ni87.75Fe11.25 TNP is about 52 kJ/mol. In addition, the prepared Pt/Ni/Fe TNPs had a good catalytic stability, which kept a high activity even after 10-run catalytic evaluation.

Key words: Pt/Ni/Fe trimetallic nanoparticles, Hydrogen generation from NaBH4, Catalytic activity, Poly(N-vinyl-2-pyrroli-done)

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