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Pt‐Ce 0.9 Cu 0.1 O 2 /activated carbon as highly active and stable HI decomposition catalyst
Author(s) -
Punkrawee Wachirapun,
Yamanaka Azusa,
Matsuda Junko,
Mitoma Yukiko,
Nishiyama Noriko,
Ishihara Tatsumi
Publication year - 2017
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3903
Subject(s) - catalysis , decomposition , dispersion (optics) , activated carbon , chemistry , carbon fibers , hydrogen , adsorption , inorganic chemistry , iodide , chemical decomposition , materials science , organic chemistry , composite number , physics , optics , composite material
Summary Effects of additives to Pt‐CeO 2 /activated carbon (M563) catalysts on HI decomposition were studied. Among the additives studied, it was found that the addition of Cu to Pt‐CeO 2 is the most effective for increasing the catalytic activity to HI decomposition. On this catalyst, almost the equilibrium hydrogen iodide (HI) conversion was achieved at temperature higher than 573 K. Cu addition increased Pt dispersion by anchoring effects. Therefore, in spite of decreased Brunauer‐Emmett‐Teller surface area of the catalyst, dispersion of Pt was much increased by addition of Cu resulting in the increased HI decomposition activity and stability. Because formed I 2 adsorbed on the catalyst at initial ca 20 hours, HI conversion was higher than that of the equilibrium one; however, after 20 hours, stable HI decomposition conversion that was almost the same with equilibrium conversion was achieved in the examined temperature range.