Kinetics of catalytic decomposition of hydrous hydrazine over CeO2-supported bimetallic Ni-Pt nanocatalysts

标题

Kinetics of catalytic decomposition of hydrous hydrazine over CeO2-supported bimetallic Ni-Pt nanocatalysts

作者

作者:Dai, H (Dai, Hao)^[1 ]; Dai, HB (Dai, Hong-Bin)^[1 ]; Zhong, YJ (Zhong, Yu-Jie)^[2 ]; Kang, Q (Kang, Qing)^[1 ]; Sun, LX (Sun, Li-Xian)^[3 ]; Wang, P (Wang, Ping)^[1 ]

期刊信息

摘要

Catalytic decomposition of hydrous hydrazine (N2H4 center dot H2O) has been considered as one of the source of hydrogen for fuel cell applications, but the reaction kinetics has received very limited attention. The kinetics of the catalytic decomposition of alkaline N2H4 center dot H2O solutions is investigated over bimetallic Ni-Pt nanocatalysts supported ceria (CeO2), which is prepared by a one-pot co-precipitation method. The resultant Ni-Pt/CeO2 catalyst exhibits high activity and 100% H-2 selectivity for the N2H4 center dot H2O decomposition. The catalytic decomposition of N2H4 center dot H2O with respect to N2H4 center dot H2O concentration follows a near-zero order kinetics at the initial reaction stage with high N2H4 center dot H2O concentrations and the fraction-order kinetics at low N2H4 center dot H2O concentrations. The kinetic rate equation can be expressed as: r = -d[N2H4 center dot H2O]/dt = k[N2H4 center dot H2O](0.52/0.043) [NaOH](0.57/0)[catalyst](1.03), k = 4.64 x 10(8) exp(-6591.29/T). Our results provide valuable insights into the catalytic decomposition kinetics of N2H4 center dot H2O. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

关键词

作者关键词:Hydrous hydrazine; Hydrogen storage; Heterogeneous catalysis; Reaction kinetics

作者信息

作者信息

通讯作者地址:Dai, HB; Wang, P (通讯作者)

South 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 ] South 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
	[ 2 ] Xian Shiyou Univ, Sch Mat Sci & Engn, Xian 710065, Peoples R China   增强组织信息的名称     Xi'an Shiyou University
	[ 3 ] Guilin Univ Elect Technol, Guangxi Collaborat Innovat Ctr Struct & Property, Sch Mat Sci & Engn, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China   增强组织信息的名称     Guilin University of Electronic Technology

电子邮件地址:mshbdai@scut.edu.cn; mspwang@scut.edu.cn

出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

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