Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 89, Issue 8, Pages 914-921Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20160102
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan-Elements Strategy Initiative to Form Core Research Center program
- Grants-in-Aid for Scientific Research [15H04186] Funding Source: KAKEN
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A supported Ru catalyst was prepared by a galvanic deposition (GD) of Ru on Co particles supported on Al2O3 (Ru/Co-GD). The structure and chemical state of Ru/Co-GD was characterized by using a pulsed CO chemisorption technique, STEM-EDS, XAFS, XPS, CO adsorption FT-IR. spectroscopy, and temperature-programed reduction (TPR) method. It is indicated that Ru/Co-GD forms Ru shell on Co nanoparticles. Such a unique structure was not formed on Ru/Co/Al2O3 prepared by a conventional sequential impregnation method (Ru/Co-seq). The Ru shell of Ru/Co-GD showed higher reducibility than Ru species of Ru/Co-seq as well as higher than Ru/Al2O3. Owing to the Ru shell having high reducibility, Ru/Co-GD showed enhanced catalytic activity for NO-C3H6 reaction. In addition, Co oxide on Ru/Co-GD exhibited high catalytic activity for CO and C3H6 oxidation. As a result, Ru/Co-GD showed superior performance for NO-C3H6-CO-O-2 reaction compared to the conventional catalysts. The Ru shell structure also contributed to the suppression of Ru vaporization.
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