high temperature membranes;
hydrogen separation membranes;
ceramic membranes;
surface characterization of membranes;
D O I:
10.1016/S0169-4332(03)00562-2
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Cermet (ceramic-metal composite) hydrogen separation membranes consisting of barium oxide, cerium oxide, yttrium oxide and palladium were characterized by utilizing X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy/ energy dispersive spectroscopy (SEM/EDS). Characterization was performed at room temperature and 650 degreesC, and after exposure to hydrogen. Changes in both elemental composition and oxidation states were observed at elevated temperatures and as a function of time. Permeation of hydrogen through the membranes also changed with time and temperature. (C) 2003 Elsevier Science B.V. All rights reserved.