Improving hydrogen production for carbon-nitride-based materials: crystallinity, cyanimide groups and alkali metals in solution working synergistically

Author(s)

Teixeira, Ivo F. ; Tarakina, Nadezda, V ; Silva, Ingrid F. ; Diab, Gabriel Ali Atta ; Salas, Nieves Lopez ; Savateev, Aleksandr ; Antonietti, Markus

• Document type: Journal article
• Source: JOURNAL OF MATERIALS CHEMISTRY A; v. 10, n. 35, p. 6-pg., 2022-08-15.

Abstract

The recent findings on the fundamental understanding of the activity of carbon nitride-based materials in the hydrogen evolution reaction (HER) allow to design rationally the photocatalytic systems with improved activities. Herein, combining highly ordered materials with cyanimide defects and alkali metal cations in the solution, we demonstrated an important synergistic effect which for cyanimide modified K-PHI is revealed in 12 times higher apparent quantum yield (AQY) compared to K-PHI free of surface cyanimide groups. (AU)

• FAPESP's process: 21/11162-8 - Multi-user equipment approved in grant 2020/14741-6: GC-MS/FID/TCD (2 injetores+Loop+Sistema valvulado)
• Grantee: Ivo Freitas Teixeira
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 20/14741-6 - Graphitic carbon nitrides as platforms for single-atom photocatalysis: moving towards design principles for improved performance
• Grantee: Ivo Freitas Teixeira
• Support Opportunities: Research Grants - Young Investigators Grants