Tracking the hydrogen spillover of heterogeneous catalysts in hydrogenation: From the formation, migration, regulation to fate

Abstract

Hydrogen spillover is a critical candidate for enhancing the hydrogenation of heterogeneous catalysts. However, the understanding and orderly controlling of spillover are still challenging. Structural design of heterogeneous catalysts significantly promotes hydrogen spillover, affecting the activity, selectivity, and stability of the hydrogenation. However, up to now, there are very few systematic reviews on tracking period of hydrogen spillover in heterogeneous catalysis. Herein, we systematically reviewed the recent research progress of hydrogen spillover from the formation, fate, to regulation. The strengthening mechanism of hydrogen spillover in hydrogenation for catalytic reaction process is proposed. In addition, targeted regulatory strategies for promoting hydrogen spillover are summarized via constitutive relationships, guiding the development of highly efficient hydrogenation catalysts. Finally, the opportunities and challenges of hydrogen spillover are prospected, providing theoretical guidance for catalytic hydrogenation methodology.