Cobalt Catalysts Enable Selective Hydrogenation of CO toward Diverse Products: Recent Progress and Perspective.

Selective hydrogenation of carbon dioxide (CO) into value-added chemicals has aroused great interest. The chemical inertness of CO and diverse reaction pathways usually require the construction of enabled catalysts. To date, cobalt (Co) catalysts characteristic of metallic and/or divalent Co components show great potential for CO hydrogenation. To better regulate the CO hydrogenation, it is necessary to summarize the current progress of cobalt catalysts for selective hydrogenation of CO. In this Perspective, first, hydrogenation of CO into methane over metallic Co sites is introduced. Second, hydrogenation of CO into methanol and C alcohols is discussed by constructing mixed-valent cobalt sites. Third, hydrogenation of CO into light olefins and C liquid fuels over cobalt-containing hybrid catalysts is introduced. Fourth, the reaction paths for selective hydrogenation of CO over cobalt catalysts are illustrated. Finally, the current challenges and prospects of cobalt-based nanocatalysts for hydrogenation of CO are proposed.