To investigate the importance of In(OH)3 morphology in CO2 electroreduction, a mesoporous form of this catalyst was hydrothermally synthesized and electrochemically evaluated toward formate generation in In(OH)3/carbon black system. Nanocubic In(OH)3 with mesoporous structure had a high surface area with great tendency to adsorb CO2 showing elevated electrochemical performance. The maximum faraday efficiency was achieved in the range of 70e77%.