Abstract: Formation of residues is a common issue in oxidation of phenol over activated carbon (AC) based materials, which results in the decrease of phenol adsorption capacity and phenol oxidation activity of these materials. Therefore, H2treatment of Cu-Ce/AC (activated carbon supported copper and cerium) subjected to phenol adsorption and oxidation and containing phenol oxidation residues were investigated at elevated temperatures. The H2treatment is found effective to promote decomposition of the residues, to recover phenol adsorption capacity of Cu-Ce/AC, and to reduce phenol desorption in the subsequent phenol oxidation process. In the range of 400℃~600℃, the effectiveness of H2treatment increases with the treatment temperature. The H2treatment, however, can not recover the phenol oxidation activity of Cu-Ce/AC due to agglomeration of the active phase.