Related Experiment Video
Updated: Jul 7, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
An in Situ Deposited Covalent Triazine Framework Photocathode for Electric Bias-Free Solar-to-Hydrogen Peroxide
Yuta Tsubonouchi1, Reika Ide1, Kazuma Takakura1
1Department of Materials Science and Technology, Faculty of Engineering, Niigata University, Niigata, Japan.
Abstract:
Innovative technology for sustainable hydrogen peroxide (H2O2) production in neutral aqueous media using solar energy displaces the current industrial production of H2O2, which primarily relies on the Riedel-Pfleiderer process involving critical issues on the use of organic solvents and high energy consumption to supply H2 gas. Photoelectrochemical (PEC) O2 reduction to produce H2O2 by visible light irradiation was approached by a new covalent triazine framework photocathode with carbazole donor moieties (Cz-CTF) in situ-deposited on a mesoporous indium tin oxide (meso-ITO) film (Cz-CTF/meso-ITO). The Cz-CTF/meso-ITO photocathode exhibited outstanding performances with IPCE of 4.7 and 2.9% (at 420 nm and 1.05 V versus reversible hydrogen electrode (RHE)), Faraday efficiency (FEH2O2) of 96 and 95% for H2O2 production at pH 3.0 and 7.0, respectively, and the high onset potential of ≈1.4 V for PEC O2 reduction among the state-of-the-art organic polymer photocathodes. The visible light-driven overall H2O2 production using water as an electron source was first achieved without electric bias in a two-electrode system in a neutral aqueous medium (pH 7.0) by coupling the Cz-CTF/meso-ITO photocathode with a BiVO4-based photoanode for water oxidation. This sheds light on the sustainable method for solar-driven overall H2O2 production in neutral aqueous media in the future industry.
More Related Videos
Related Concept Videos
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview
The Z-Scheme of Electron Transport in Photosynthesis
Voltaic/Galvanic Cells
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

