The dataset contains raw data supporting the article ‘Integrated Capture and Solar-driven Utilization of CO2 from Flue Gas and Air’. An integrated photoelectrochemical system has been developed for sunlight-driven captured CO2 conversion coupled to waste plastic reforming. The dataset is divided into four key parts: i) Catalyst Characterization: contains SEM-EDX, IR, UV-Vis data, ii) CO2 Capture: contains NMR data, iii) Electrochemistry: contains all electrochemical data, iv) Photo-electrochemistry: contains all photoelectrochemical data. For more details about experimental procedure, instrumentation, and data collection, see the manuscript.