Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 59, Issue 43, Pages 19145-19152Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.0c01885
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Funding
- National Natural Science Foundation of China [21722606, 21576137, 21676138, 21878149]
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions
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Palladium (Pd)-containing catalysts have gained extensive attention because of their outstanding activity in various heterogeneous catalytic reactions. The activity of these catalysts highly correlates with the size of the Pd particles. Herein, nanosized Pd particles were fabricated by utilizing the as-made SBA-15 (AS) possessing nanoconfined spaces between the template P123 and silica walls. By using the inherent nanoconfined spaces in AS, Pd nanoparticles with a smaller size can be generated conveniently (yielding Pd-AS); in contrast, Pd is apt to aggregate and form larger-sized particles in the conventionally calcined SBA-15 (CS) without nanoconfined spaces (yielding Pd-CS). The smaller size of Pd nanoparticles in Pd-AS endows the catalysts with better catalytic activity in CO oxidation compared to their Pd-CS counterparts. On the typical sample 5Pd-AS with 5 wt % of Pd, the turnover frequency at 140 degrees C is 1.55 min(-1), which is superior to its analogue 5Pd-CS (0.22 min(-1)).
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