Open AccessXAFS study on the sulfidation mechanisms of Co–Mo catalysts supported on activated carbon and alumina: effect of complexing agent
Author(s) -
Tsuji Koji,
Umeki Takashi,
Yokoyama Yasuharu,
Kitada Takayuki,
Iwanami Yoshimu,
aka Osamu,
Shimada Hiromichi,
Matsubayashi Nobuyuki,
Nishijima Akio,
Nomura Masaharu
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500018641
Subject(s) - sulfidation , nitrilotriacetic acid , x ray absorption fine structure , cobalt , chemistry , catalysis , activated carbon , carbon fibers , inorganic chemistry , chelation , adsorption , materials science , organic chemistry , composite number , spectroscopy , physics , quantum mechanics , composite material
The effect of nitrilotriacetic acid (NTA) as a complexing agent on the sulfidation mechanisms of Co‐Mo catalysts supported on activated carbon and alumina was examined by the XAFS technique. The XAFS results revealed that NTA interacted with Co atoms and formed the Co‐NTA interaction, while it showed almost no influence on the local structures around Mo atoms. The Co‐NTA interaction suppressed the aggregation of cobalt atoms and the interaction between cobalt and alumina during sulfiding, and consequently promoted the formation of the Co‐Mo‐S phase.