Solid-state solvent-free catalyzed hydrogenation: Enhancing reaction efficiency by spillover agents.

Highlights: [•] The kinetics of solid state hydrogenation is controlled by spillover mechanism. [•] The hydrogenation rate scales with the spillover agent concentrations. [•] Carbon nanotubes and silica fumed are efficient spillover agents. [•] Carbon nanotubes type affects the hydrogenation rate. [•] The amount of metallic catalyst could be minimized by using a spillover agent. [Copyright &y& Elsevier]