Chemisorption and decomposition of pyrrole on Pd 111

摘要: Abstract XPS, TPD and HREEL results indicate that molecular pyrrole is a fragile adsorbate on clean Pd 111. At 200 K for low coverages, the molecule remains intact adopts an almost flat-lying geometry. With increasing coverage, molecules tilt away from surface undergo NH bond cleavage to form strongly tilted pyrrolyl (C 4 H N) species. In addition, weakly bound, of observed at coverages approaching saturation. Heating monolayers in desorption ≈ 15% overlayer as + C N recombination with formation molecules. This bound species undergoes decomposition adsorbed CN, CH x H, leading ultimately HCN 2 . The implications these production by heterogeneously catalysed route are discussed.