Open AccessXAFS study on Mn‐Ni/Al 2 O 3 catalyst for carbon dioxide reforming of methane
Author(s) -
Choi Sun Hee,
Seok SeungHo,
Lee Jae Sung
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/s0909049500016198
Subject(s) - x ray absorption fine structure , manganese , nickel , extended x ray absorption fine structure , catalysis , xanes , metal , methane , inorganic chemistry , phase (matter) , materials science , chemistry , analytical chemistry (journal) , absorption spectroscopy , metallurgy , spectroscopy , organic chemistry , physics , quantum mechanics
As an effective catalyst for carbon dioxide reforming of methane, manganese‐promoted Ni/Al 2 O 3 catalyst was studied with XAFS. The catalysts after the reduction above 1073 K contained the metallic nickel, and several phases of manganese were shown by XANES and EXAFS. Results of EXAFS curve fitting indicated that the surface of large metallic nickel particles was partly covered with patches of MnO and metallic Mn. Radial structure function (RSF) of Mn K‐edge showed the peaks due to Mn‐Ni scattering without Mn‐Mn scattering, indicating that the metallic manganese was attached to nickel in a highly dispersed state. Separate manganese phase was also formed without interaction with nickel.