Well-defined surface tungstenocarbyne complex through the reaction of [W(C t Bu)(CH 2 t Bu) 3 ] with CeO 2 : a highly stable precatalyst for NOx reduction with NH 3

A novel well-defined precatalyst for ammonia-selective catalytic reduction of NOx (NH 3 -SCR), namely, [W(C t Bu)(CH 2 t Bu) 3 ]/CeO 2 , 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 °C, described by up to 99% conversion of NOx, high N 2 selectivity, broad operation temperature window (225–500 °C), and extremely high durability for the selective catalytic reduction of NOx with NH 3 .