With increasing interest in hydrogen peroxide (H2O2) as an environmentally friendly oxidant for environmental remediation and a promising liquid fuel, we present herein a novel method for green and sustainable H2O2 production using versatile dopamine-based materials, demonstrating the conversion of H2O2 generation mechanism from a chemical to a photocatalytic process along with the structural transformation of dopamine to polydopamine. During the auto-oxidation of dopamine in the presence of oxygen, which involved the transition of catechol to hydroquinone groups and the ring closure of the amine group, H2O2 was chemically generated at a rate of 1.61 mmol g-1h−1 without an extra electron donor and additional energy sources. In contrast, self-polymerized polydopamine exhibited an effective photocatalytic H2O2 generation at a rate of 0.53 mmol g-1h−1 owing to its visible light absorptivity and semiconducting property. We anticipate that these unique properties of dopamine will provide a new class of organic-based, highly efficient solar-to-H2O2 conversion and sustainable energy systems in the future.
Bibliographical noteFunding Information:
We thank Dr. Eeseul Shin for initial help and comments on the project. This work was supported by the National Research Foundation of Korea ( NRF-2021R1F1A1063702 , NRF-2021R1A2C3004978 , NRF-2018R1A5A1025208 , NRF-2017M3A7B4052802 , and NRF-2021R1C1C1007706 ), and by the Ecological Imitation-based Environmental Pollution Management Technology Development Project ( 2019002790008 ) funded by the Korea Ministry of Environment (MOE) .
© 2022 Elsevier Inc.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry