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- Title
Unraveling Precise Locations of Indium Atoms in g‐C<sub>3</sub>N<sub>4</sub> for Ameliorating Hydrogen Peroxide Piezo‐Photogeneration.
- Authors
Anh, Nguyen Hoai; Nguyen, Duc‐Viet; Luu, Tuyen Anh; Phan, Pham Duc Minh; Toan, Huynh Phuoc; Ly, Pho Phuong; Hung, Nguyen Quang; Nguyen, Ngoc Linh; Hur, Seung Hyun; Hue, Pham Thi; Hue, Nguyen Thi Ngoc; Pham, Minh‐Thuan; Ung, Thuy Dieu Thi; Bich, Do Danh; Dao, Vinh‐Ai; Doan, Huan V.; Isaacs, Mark; Nguyen, Minh Chien; Yu, Woo Jong; Lee, Yen‐Yi
- Abstract
Increasing active sites in catalysts is of utmost importance for catalytic processes. In this regime, single‐atom dispersing on graphitic carbon nitrides (g‐C3N4) to produce fine chemicals, such as hydrogen peroxide (H2O2), is of current interest due to not only enhancing catalytic performance but also reducing the loading of necessary metals. Herein, g‐C3N4 is engineered by atomically dispersing aluminum (Al) or indium (In) sites to provide catalytic active centers via one‐step thermal shock polymerization. The addition of Al and In sites can accelerate the catalytic efficacy owing to the Lewis acid–base interactions between these metals and oxygen (O2). Under catalytic conditions, the formation of oxygenic radicals will strongly be associated with the enhanced formation of H2O2, confirmed by in situ electron paramagnetic resonance spectroscopy. Furthermore, the empirical analyses from positron annihilation spectroscopy show that In atoms will occupy the near positions of carbon vacancies (VC) to form NVC@InO bonds. This replacement will produce the highest formation energy based on the density functional theory calculations, improving the stability of atom‐dispersive materials. Therefore, via the combination of experimental and theoretical proofs, this study suggests the exact location of In atoms in g‐C3N4 structures, which can help boost the catalytic production of H2O2.
- Subjects
ELECTRON paramagnetic resonance spectroscopy; HYDROGEN peroxide; INDIUM; NITRIDES; POSITRON annihilation; ATOMS; THERMAL shock
- Publication
Solar RRL, 2024, Vol 8, Issue 8, p1
- ISSN
2367-198X
- Publication type
Article
- DOI
10.1002/solr.202400034