Retracted Article: Monodisperse Ni3Fe single-crystalline nanospheres as a highly efficient catalyst for the complete conversion of hydrous hydrazine to hydrogen at room temperature

Dong Ge Tong; Dong Mei Tang; Wei Chu; Gui Fang Gu; Ping Wu

doi:10.1039/C3TA10321H

Retracted Article: Monodisperse Ni₃Fe single-crystalline nanospheres as a highly efficient catalyst for the complete conversion of hydrous hydrazine to hydrogen at room temperature†

Dong Ge Tong,*^a Dong Mei Tang,^a Wei Chu,*^b Gui Fang Gu^a and Ping Wu^a

* Corresponding authors

^a Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
E-mail: tongdongge@163.com
Fax: +86-28-8407-9074

^b College of Chemical Engineering, Sichuan University, Chengdu 610065, China
E-mail: chuwei65@yahoo.com.cn
Fax: +86-28-8540-3397

Abstract

A facile, reliable, and robust synthetic method for the preparation of monodisperse Ni₃Fe single-crystalline nanospheres with 182.3 m² g⁻¹ specific surface area is reported. The results of an investigation of the shape/size distribution, structural characteristics, and composition of these Ni₃Fe nanospheres are presented, and a possible mechanism for the formation of the nanospheres at high temperatures in a cetylamine–palmitic acid solution in the presence of tri-iso-butyl thallium and borane trimethylamine complexes is proposed. During the decomposition of hydrazine, when supported on carbon (Ni₃Fe/C), the monodisperse Ni₃Fe nanospheres exerted 100% H₂ selectivity, and showed exceedingly high activity at room temperature. The decomposition reaction is first-order in Ni₃Fe concentration, but zero-order in N₂H₄ concentration; the activation energy was 48.1 ± 2.0 kJ mol⁻¹. Furthermore, the Ni₃Fe/C was a stable catalyst for N₂H₄ hydrolytic dehydrogenation; it provided 15 840 total turnovers in 30 h. An Ni₃Fe nanosphere-based catalyst such as this that is efficient under mild reaction conditions represents a promising step toward the practical development of N₂H₄ as a feasible hydrogen storage medium for fuel cell applications.

Journal of Materials Chemistry A

Retracted Article: Monodisperse Ni₃Fe single-crystalline nanospheres as a highly efficient catalyst for the complete conversion of hydrous hydrazine to hydrogen at room temperature†

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Journal of Materials Chemistry A