Monodisperse Nickel Nanoparticles Supported on SiO_(2) as an Effective Catalyst for the Hydrolysis of Ammonia-Borane

作     者：Önder Metin SaimÖzkar Shouheng Sun 

作者机构：Department of ChemistryMiddle East Technical University06531AnkaraTurkey Department of ChemistryBrown UniversityProvidenceRhode Island 02912USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2010年第3卷第9期

页      面：676-684页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：ÖM thanks The Scientific and Technological Research Council of Turkey(TUBITAK)for a 2214-Research Fellowship Program and the METU-DPT-OYP program on the behalf of Atatürk University 

主　　题：Nickel nanoparticles supported catalyst hydrogen storage hydrolysis of ammonia-borane 

摘      要：Monodisperse Ni nanoparticles(NPs)have been synthesized by the reduction of nickel(Ⅱ)acetylacetonate with the borane–tributylamine complex in a mixture of oleylamine and oleic *** Ni NPs are an active catalyst for the hydrolysis of the ammonia–borane(AB,H3N⋅BH3)complex under ambient conditions and their activities are dependent on the chemical nature of the oxide support that they were deposited *** various oxides(SiO_(2),Al_(2)O_(3),and CeO_(2))tested,SiO_(2)was found to enhance Ni NP catalytic activity due to the etching of the 3.2 nm Ni NPs giving Ni(Ⅱ)ions and the subsequent reduction of Ni(Ⅱ)that led to the formation of 1.6 nm Ni NPs on the SiO_(2)*** kinetics of the hydrolysis of AB catalyzed by Ni/SiO_(2)was shown to be dependent on catalyst and substrate concentration as well as *** Ni/SiO_(2)catalyst has a turnover frequency(TOF)of 13.2 mol H_(2)⋅(mol Ni)^(–1)⋅min^(–1)—the best ever reported for the hydrolysis of AB using a nickel catalyst,an activation energy of 34 kJ/mol±2 kJ/mol and a total turnover number of 15,400 in the hydrolysis of *** is a promising candidate to replace noble metals for catalyzing AB hydrolysis and for hydrogen generation under ambient conditions.