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The purpose of this chapter is to present a survey of the organometallic chemistry and catalysis of rhodium and iridium related to the oxidation of organic substrates that has been developed over the last 5 years, placing special emphasis on reactions or processes involving environmentally friendly oxidants. Iridium-based catalysts appear to be promising candidates for the oxidation of alcohols to...
We have developed a new mode of bifunctional catalysis based on metal–ligand cooperation, involving aromatization–dearomatization of pyridine- and acridine-derived pincer complexes. This type of metal–ligand cooperation is involved in the recently discovered environmentally benign reactions of alcohols, catalyzed by PNP and PNN pincer complexes of ruthenium, including: (a) dehydrogenation of secondary...
Acetic acid synthesis via the carbonylation of methanol is one of the most important industrial applications of catalysis using organometallic compounds. All the group 9 metals are active, with processes based on cobalt, rhodium and iridium having been developed since the 1960s. This paper surveys some of the more recent approaches employed for improving the performance of the rhodium- and iridium-based...
Simultaneous removal of diesel soot particulates and nitrogen oxides has been investigated over iridium catalysts in the presence of oxygen. Ir/γ-Al2O3 catalyst is superior to Pt/ γ -Al2O3 catalyst for the simultaneous removal of soot and nitrogen oxides. 1 wt.% of Ir/γ-Al2O3 is an optimal content in the examined Ir contents (blank, 0.1 wt.%, 1 wt.% and 5 wt%). Support material has a little effect...
Epitaxial graphene can be grown by catalytic decomposition of hydrocarbons on Ir(111). Scanning tunneling microscopy reveals that C/Ir(111) has a high degree of structural quality (??m-sized domains, coherent overgrowth of surface defects). The system is characterized by weak metal-graphene bonding and shows a pronounced moire?? superstructure. The growth process can be tuned to yield different morphologies...
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