作者: David P. Anderson , Rohul H. Adnan , Jason F. Alvino , Oliver Shipper , Baira Donoeva
DOI: 10.1039/C3CP52497C
关键词:
摘要: Synchrotron XPS was used to investigate a series of chemically synthesised, atomically precise gold clusters Au(n)(PPh3)y (n = 8, 9 and 101, y depending on the cluster size) immobilized anatase (titania) nanoparticles. Effects post-deposition treatments were investigated by comparison untreated samples with analogues that have been heat treated at 200 °C in O2, or O2 followed H2 atmosphere. data shows phosphine ligands are oxidised upon treatment O2. From position Au 4f(7/2) peak it can be concluded partially agglomerate immediately deposition. Heating oxygen, subsequently hydrogen, leads further agglomeration clusters. It is found pre-treatment plays crucial role removal