ZIF-67 Derived Hollow Structured Co3O4 Nanocatalysts: Tunable Synthetic Strategy Induced Enhanced Catalytic Performance
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Two different hollow structured Co3O4 micro-polyhedrons, derived from Zeolitic imidazolate frameworks (ZIF)-67 crystals, were fabricated by tuning the synthetic strategy (positive or reverse addition). The results demonstrate that the synthetic strategy significantly affect catalyst structure and properties. Compared with Co3O4-A nanocatalyst, the Co3O4-B nanocatalyst exhibit superior catalytic performance, showing 100% CO conversion at the conditions of T = 110 °C and SV = 30,000 h−1. The higher catalytic performance could be attributed to its higher surface area, lower temperature reducibility, and abundant surface Co3+ and adsorbed oxygen.
KeywordsSynthetic strategy Co3O4 nanocatalyst Hollow structure Zeolitic imidazolate frameworks CO oxidation
This work was supported by the National Natural Science Foundation of China (21503184), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (18KJA610004), and the Natural Science Foundation of Jiangsu Province-General Program (BK20171273).