Fig. 1: Production of reactive oxygen species (ROS) via contact-electro-catalysis (CEC) in ball milling. | Nature Communications

Fig. 1: Production of reactive oxygen species (ROS) via contact-electro-catalysis (CEC) in ball milling.

From: A contact-electro-catalysis process for producing reactive oxygen species by ball milling of triboelectric materials

Fig. 1

a Schematic illustration of a ball mill process using triboelectric materials. b Comparison between piezoelectric and contact-electrification (CE) effects, which suggests that catalyzing reactions by CE charges should be possible. The abbreviation “red” represents for reduction reactions, and “oxd” for oxidation reactions. c–e Measured electron paramagnetic resonance (EPR) spectra in the condition of employing different triboelectric materials for ball milling. PP is short for polypropylene, PDMS for polydimethylsiloxane, and PTFE for polytetrafluoroethylene. 5,5-dimethyl-1-pyrroline N-oxide (DMPO) is the capture for hydroxyl and superoxide radicals, and 2,2,6,6-tetramethyl-4-piperidone hydrochloride (TEMP) is employed for capturing singlet oxygen. Source data are provided as a Source Data file. Created with Procreate, PowerPoint, and Adobe Illustrator.

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