Transfer hydrogenation of phenol over Co-CoOx/N-doped carbon: boosted catalyst performance enabled by synergistic catalysis between Co0 and Coδ+

N-doped carbon sphere supported cobalt nanoparticles (Co-CoO x /NCS) exhibited boosted capacity for transfer hydrogenation of phenol compared to Co/NCS and Co 3 O 4 /NCS, ascribing to the synergy of Co 0 and Co δ + .