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Nickel Boosts Ring‐Opening Activity of Iridium
Author(s) -
ZiaeiAzad Hessam,
Semagitalia
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201300844
Subject(s) - bimetallic strip , iridium , catalysis , materials science , nanoparticle , polyvinylpyrrolidone , x ray photoelectron spectroscopy , diffuse reflectance infrared fourier transform , nickel , temperature programmed reduction , fourier transform infrared spectroscopy , non blocking i/o , hydride , nuclear chemistry , inorganic chemistry , chemistry , metal , photocatalysis , chemical engineering , polymer chemistry , nanotechnology , organic chemistry , metallurgy , engineering
A variety of bimetallic Ni–Ir catalysts were synthesised by preforming nanoparticles in the presence of polyvinylpyrrolidone, followed by deposition on γ‐alumina and high‐temperature polymer removal. The Ni–Ir (1:1 molar ratio) nanoparticles prepared by the hydrogen‐sacrificial technique (Ir reduction on the preformed Ni nanoparticles with surface Ni hydride) allowed increasing indane ring opening activity per total amount of Ir as compared to monometallic Ir. The simultaneous reduction of Ni and Ir precursors was not as efficient. The catalysts were characterised with UV/Vis spectroscopy, TEM, temperature‐programmed reduction, CO 2 temperature‐programmed desorption, CO diffuse reflectance Fourier transform spectroscopy, X‐ray photoelectron spectroscopy and CHN analysis. The study only explored the catalyst’s metal function and allows saving rare and expensive iridium without loss of its outstanding performance as a ring‐opening catalyst.