Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 323, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.122180
Keywords
Photocatalysis; Water splitting; Oxygen evolution; Carbon nitride; Single atom
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This study proposes a universal strategy to enhance the OER activity of PCN-based photocatalysts by synthesizing single-atom metal-oxygen doped PCN through electrostatic adsorption of oxometallate anions on protonated amorphous melon. The MO structure functions as OER active centers and enhances photoexcited charge separation by introducing hole-trapping doping levels in bandgaps.
Polymeric carbon nitride (PCN) is a prospective photocatalyst in water splitting to produce H2, but its overall water splitting (OWS) activity is suppressed by the sluggish oxygen evolution reaction (OER). Herein, a general strategy involving electrostatic adsorption of oxometallate anions on protonated amorphous melon was proposed to synthesize single-atom metal-oxygen doped PCN (MO-PCN). MO-PCN exhibits highly enhanced photocatalytic OER and thereby OWS activity, benefitting from the MO structure functioning as OER active centers and enhancing photoexcited charge separation by introducing hole-trapping doping levels in bandgaps. This work provides a universal strategy to enhance OER activity of PCN-based photocatalysts.
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