Controllable Anchoring of Graphitic Carbon Nitride on MnO2 Nanoarchitectures for Oxygen Evolution Electrocatalysis

• DOI: 10.1021/acsami.3c09363
• Publication Date: 2023-09-28T19:37:44Z
• Authors: Mattia Benedet; Andrea Gallo; Chiara Maccato; Gian Andrea Rizzi; Davide Barreca; Oleg I. Lebedev; Evgeny Modin; Ruairi McGlynn; Davide Mariotti; Alberto Gasparotto
• Keywords: Oxygen evolution; Overpotential; Graphitic carbon nitride; Carbon nitride

The design and fabrication of eco-friendly cost-effective (photo)electrocatalysts for the oxygen evolution reaction (OER) is a key research goal proper management water splitting to address global energy crisis. In this work, we focus on preparation supported MnO2/graphitic carbon nitride (g-CN) OER by means novel strategy. proposed route consists plasma enhanced-chemical vapor deposition (PE-CVD) MnO2 nanoarchitectures porous Ni scaffolds, anchoring controllable g-CN amounts an amenable electrophoretic (EPD) process, ultimate thermal treatment in air. inherent method versatility flexibility afforded defective MnO2/g-CN nanoarchitectures, featuring content nano-organization tunable as function EPD duration used precursor. Such modulation had direct influence functional performances, which, best composite system, corresponded overpotential 430 mV at 10 mA/cm2, Tafel slope ≈70 mV/dec, turnover frequency 6.52 × 10-3 s-1, accompanied very good time stability. present outcomes, comparing favorably with previous results analogous systems, were rationalized basis formation type-II heterojunctions, yield valuable insights into class green end uses solar-to-fuel conversion treatment.