PREPARATION OF Ni-Pt/La2O3 CATALYST AND ITS KINETICS STUDY OF HYDROUS HYDRAZINE FOR HYDROGEN GENERATION

标题

PREPARATION OF Ni-Pt/La2O3 CATALYST AND ITS KINETICS STUDY OF HYDROUS HYDRAZINE FOR HYDROGEN GENERATION

作者

作者:Zhong, YJ (Zhong Yujie)^[1 ]; Dai, HB (Dai Hongbin)^[2 ]; Wang, P (Wang Ping)^[2 ]

期刊信息

摘要

Safe and efficient hydrogen storage remains a grand challenge in the widespread implementation of hydrogen fuel cell technology. Recently, chemical hydrogen storage has emerged as a promising alternative for vehicular and portable applications. A number of hydrogen-rich materials have been experimentally demonstrated to deliver large amounts of hydrogen under mild conditions with controllable kinetics. Among these materials of interest, hydrous hydrazine (N2H4 center dot H2O) is a promising but yet not fully explored candidate. The development of highly efficient catalyst and its reaction kinetics law are the key issues of N2H4 center dot H2O-based hydrogen generation (HG) systems. Herein, a supported Ni-Pt/La2O3 catalyst was prepared by a combination of co-precipitation and galvanic replacement methods. Via optimizing preparing processes, the developed catalyst enabled a complete decomposition of N2H4 center dot H2O to generate H-2 at a reaction rate of 340 h(-1) at 323 K, which outperforms most reported N2H4 center dot H2O decomposition catalysts. Phase/structural analyses by XRD, TEM and XPS were carried out to gain insight into the catalytic performance of the Ni-Pt/La2O3 catalyst. In addition, the effects of temperature, concentration of N2H4 center dot H2O and NaOH, and amount of catalyst on the N2H4 center dot H2O decomposition were investigated over the Ni-Pt/La2O3 catalyst. The kinetic rate equation may be represented by the expression: r = -d[N2H4 center dot H2O]/dt = 2435exp(-51.53/(RT)) [N2H4 center dot H2O](0) (3)[NaOH](0(0 12))[Ni](1 03). The obtained results should lay the experimental and theoretical foundation for developing practical application of N2H4 center dot H2O-based HG system.

关键词

作者关键词:hydrous hydrazine; hydrogen generation; catalyst; reaction kinetics

作者信息

作者信息

通讯作者地址:Dai, HB (通讯作者)

S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China   增强组织信息的名称     Institute of Metal Research, CAS     Chinese Academy of Sciences
	[ 2 ] S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:mshbdai@scut.edu.cn

出版商

SCIENCE PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA

类别分类