Disclosed is a hybrid catalyst system for the production of hydrogen/carbon monoxide syngas. The hybrid catalyst system includes a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst grafted on a semiconductor metal oxide. The hybrid catalyst system can produce syngas without the aid of external energy and enables control over the ratio of hydrogen/carbon monoxide formed. Therefore, the hybrid catalyst system can find application in various industrial fields, including chemical fuel production.