期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 278, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119258
关键词
CO PROX; Yttrium stabilized zirconia; Copper active sites
资金
- National Academy of Sciences of Ukraine
- Ministry of Education and Sciences of Ukraine [89452]
Nano-sized CuYZr ternary oxides obtained through an original single step co-precipitation synthesis were submitted to an in depth characterization and further tested in the catalytic CO PROX reaction. The tetragonal phase was identified as the main one whatever the calcination temperature. The study of the copper distribution within the crystals through complementary STEM EDX chemical mapping, UV-vis and H-2 Thermo Programmed Reduction (TPR) analysis allowed the identification of at least three distinct sites. The PROX tests revealed interesting properties with CO conversion as high as 95 % and relatively high O-2 selectivity towards CO2 in the high temperature range. Finally, interesting relationships between relative abundance of copper sites and catalytic activity/selectivity were obtained allowing suggesting relevant active sites.
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