Methanol Assisted Lean NOx Reduction Over Ag–Al2O3—Influence of Hydrogen and Silver Loading

Direct observation of atomically-resolved silver species on a silver alumina catalyst active for selective catalytic reduction of nitrogen oxides

“…1 The Ag/Al 2 O 3 catalyst was first shown to be active for SCR with propane as reductant by Miyadera 2 and has later been shown to be active for SCR with various types of hydrocarbons (HC-SCR) 1, [3][4][5][6][7][8][9] and recently with a combination of ethanol and ammonia. 10 Since the work of Satokawa, 11 reporting that the addition of small amounts of hydrogen promotes the activity for HC-SCR over this system, several reports on the role of hydrogen have been published 1, [12][13][14][15][16] (and references herein). The active site for the HC-SCR reaction over Ag/Al 2 O 3 has been suggested to be partially charged silver clusters of about 3-4 silver atoms in size.…”