Co-based catalysts have attracted increasing attention as promising catalysts for propane dehydrogenation (PDH) because of their C–H bond activation ability. Co species in Co/Al₂O₃ are present in various forms, such as Co₃O₄, CoAl₂O₄, CoO, and metallic Co. However, the catalytic properties of the various Co species in PDH are unclear. In this work, we prepare Co/Al₂O₃ with different compositional distribution of Co species by heat-treating the supported Co precursor under O₂, Ar, and H₂ atmospheres at temperatures between 500 and 600 °C. H₂-treated Co/Al₂O₃ results in superior performance compared to O₂- and Ar-treated catalysts. This is attributed to the relatively high Co surface concentration and relatively high ratio of tetrahedral Co²⁺ stabilized in CoAl₂O₄ to the total Co species. A detailed study shows that both tetrahedral Co²⁺ and metallic Co in Co/Al₂O₃ are active for PDH, but the former is more selective.

钴基催化剂由于其 C-H 键活化能力，作为丙烷脱氢 (PDH) 的有前途的催化剂而受到越来越多的关注。Co/Al ₂ O ₃中的Co物种以多种形式存在，例如Co ₃ O ₄、CoAl ₂ O ₄、CoO和金属Co。然而，各种Co物种在PDH中的催化性能尚不清楚。在这项工作中，我们通过在 O ₂、Ar 和 H ₂气氛下在 500 到 600 °C 的温度下对负载的 Co 前驱体进行热处理来制备具有不同 Co 物种组成分布的Co/Al ₂ O ₃。H ₂处理的 Co/Al与O ₂和Ar 处理的催化剂相比，₂ O ₃产生了优越的性能。这归因于相对高的 Co 表面浓度和相对高的稳定在 CoAl ₂ O _{4 中}的四面体 Co ²⁺与总 Co 物质的比率。详细研究表明，四面体Co ²⁺和Co/Al ₂ O ₃中的金属Co均对PDH 具有活性，但前者更具选择性。