INIFTA   05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Hydrolysis of ammonia-borane over Ni/ZIF-8 nanocatalyst: high efficiency, mechanism and controlled hydrogen release
Autor/es:
WANG, CHANGLONG; ZHANG, CHEN; MOYA, SERGIO; TUNINETTI, JIMENA; CIGANDA, ROBERTO; RUIZ, JAIME; WANG, ZHAO; SALMON, LIONEL; ASTRUC, DIDIER
Revista:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2017
ISSN:
0002-7863
Resumen:
Non-noble metal nanoparticles are notoriously difficult to prepare and stabilize withappropriate dispersion, which in turn severely limits their catalytic functions. Hereusing zeolitic imidazolate framework (ZIF-8) as MOF template, catalyticallyremarkably efficient ligand-free first-row late transition-metal nanoparticles areprepared and compared. Upon scrutiny of the catalytic principles in the hydrolysis of ammonia-borane, the highest total turnover frequency among these first-row latetransition metals is achieved for the templated Ni nanoparticles with 85.7molH2·molcat-1·min-1 at room temperature, which overtakes performances of previousnon-noble metal nanoparticles systems, and is even better than some noble metalnanoparticles systems. Mechanistic studies especially using kinetic isotope effectsshow that cleavage by oxidative addition of an O?H bond in H2O is the ratedetermining steps in this reaction. Inspired by these mechanistic studies, an attractiveand effective ?on-off? control of hydrogen production is further proposed.