New Insight on Carbon Dioxide‐Mediated Hydrogen Production**
Prof. Dr. Antoni W. Morawski,
Dr. Ewelina Kusiak‐Nejman,
Dr. Iwona Pełech,
Katarzyna Ćmielewska,
Dr. Daniel Sibera,
Piotr Staciwa,
Dr. Agnieszka Wanag,
Marcin Gano,
Dr. Ewa Ekiert,
Dr. Joanna Kapica‐Kozar,
Kordian Witkowski,
Prof. Dr. Urszula Narkiewicz
Affiliations
Prof. Dr. Antoni W. Morawski
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Dr. Ewelina Kusiak‐Nejman
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Dr. Iwona Pełech
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Katarzyna Ćmielewska
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Dr. Daniel Sibera
Department of General Civil Engineering Faculty of Civil and Environmental Engineering West Pomeranian University of Technology in Szczecin Piastów Ave., 50a 70-311 Szczecin Poland
Piotr Staciwa
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Dr. Agnieszka Wanag
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Marcin Gano
Department of Chemical Organic Technology and Polymeric Materials Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Piastów Ave., 42 71-065 Szczecin Poland
Dr. Ewa Ekiert
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Dr. Joanna Kapica‐Kozar
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Kordian Witkowski
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Prof. Dr. Urszula Narkiewicz
Department of Chemical Inorganic Technology and Environment Engineering Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Pułaskiego 10 70-322 Szczecin Poland
Abstract A new approach to hydrogen production from water is described. This simple method is based on carbon dioxide‐mediated water decomposition under UV radiation. The water contained dissolved sodium hydroxide, and the solution was saturated with gaseous carbon dioxide. During saturation, the pH decreased from about 11.5 to 7–8. The formed bicarbonate and carbonate ions acted as scavengers for hydroxyl radicals, preventing the recombination of hydroxyl and hydrogen radicals and prioritizing hydrogen gas formation. In the presented method, not yet reported in the literature, hydrogen production is combined with carbon dioxide. For the best system with alkaline water (0.2 m NaOH) saturated with CO2 under UV‐C, the hydrogen production amounted to 0.6 μmol h−1 during 24 h of radiation.
