TY - JOUR
T1 - Oxygen X-ray absorption near-edge structure characterization of the Ba-doped yttria oxidative coupling catalyst
AU - Kaminsky, M. P.
AU - Zajac, G. W.
AU - Campuzano, J. C.
AU - Faizt, M.
AU - Beaulaigue, L.
AU - Gofron, K.
AU - Jenningst, G.
AU - Yao, J. M.
AU - Saldin, D. K.
PY - 1992/7
Y1 - 1992/7
N2 - Ba-doped Y2O3 is one of the most active catalysts for the oxidative coupling of methane. Here, based on measurements of the oxygen K-edge X-ray absorption edge, X-ray diffraction, X-ray fluorescence, and X-ray photoelectron spectroscopy and its catalytic activity and selectivity, we propose that the active sites are charge-deficient oxygen sites created as Bat+ substitutes into Y3+ lattice sites. The substitution is temperature dependent, becoming significant only at higher temperatures. We have found a correlation of catalytic activity and selectivity as a function of Ba loading on Y203. This is reflected in the oxygen K-edge absorption near the absorption edge.
AB - Ba-doped Y2O3 is one of the most active catalysts for the oxidative coupling of methane. Here, based on measurements of the oxygen K-edge X-ray absorption edge, X-ray diffraction, X-ray fluorescence, and X-ray photoelectron spectroscopy and its catalytic activity and selectivity, we propose that the active sites are charge-deficient oxygen sites created as Bat+ substitutes into Y3+ lattice sites. The substitution is temperature dependent, becoming significant only at higher temperatures. We have found a correlation of catalytic activity and selectivity as a function of Ba loading on Y203. This is reflected in the oxygen K-edge absorption near the absorption edge.
UR - http://www.scopus.com/inward/record.url?scp=0009555943&partnerID=8YFLogxK
U2 - 10.1016/0021-9517(92)90102-N
DO - 10.1016/0021-9517(92)90102-N
M3 - Article
AN - SCOPUS:0009555943
SN - 0021-9517
VL - 136
SP - 16
EP - 23
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 1
ER -