Well-Defined Surface Tungstenocarbyne Complex Through The Reaction Of [W( Ctbu)(Ch(2)Tbu)(3)] With Ceo2: A Highly Stable Precatalyst For Nox Reduction With Nh3

A novel well-defined precatalyst for ammonia-selective catalytic reduction of NOx (NH3-SCR), namely, [W( CtBu)(CH(2)tBu)(3)]/CeO2, was prepared by surface organometallic chemistry and then characterized. Due to the high dispersion of the active phase, this catalyst showed excellent activity after calcination at 500 degrees C, described by up to 99% conversion of NOx, high N-2 selectivity, broad operation temperature window (225-500 degrees C), and extremely high durability for the selective catalytic reduction of NOx with NH3.