Piezo‐Flexocatalysis of Single‐Atom Pt‐Loaded Graphitic Carbon Nitride.

This study develops a single‐atom Pt‐loaded graphitic carbon nitride (SA‐Pt/CN) and evaluates its piezo‐flexocatalytic properties by conducting a hydrogen evolution reaction (HER) and Rhodamine B (RB) dye degradation test under ultrasonic vibration in the dark. SA‐Pt/CN has a hydrogen gas yield of 1283.8 µmol g−1 h−1, which is 23.3 times higher than that of pristine g‐C3N4. Moreover, SA‐Pt/CN enhances the dye degradation reaction rate by ≈2.3 times compared with the pristine sample. SA‐Pt/CN exhibits lattice distortion and strain gradient enlargement caused by the single atom Pt at the N sites of g‐C3N4, which disrupts the symmetric structure and contributes to the enhancement of piezoelectric and flexoelectric polarization. As far as it is known, this is the first study to investigate the piezo‐flexocatalytic reaction of SA‐Pt/CN without light irradiation and provides new insights into single‐atom piezocatalysts. [ABSTRACT FROM AUTHOR]