Publications Repository - Gdańsk University of Technology

Polycrystalline boron-doped diamond is a promising material for high-power aqueous electrochemical applications in bioanalytics, catalysis, and energy storage. The chemical vapor deposition (CVD) process of diamond forma-tion and doping is totally diversified by using high kinetic energies of deu-terium substituting habitually applied hydrogen. The high concentration of deuterium in plasma induces atomic arrangements and steric hindrance during synthesis reactions, which in consequence leads to a preferential (111) texture and more effective boron incorporation into the lattice, reaching a one order of magnitude higher density of charge carriers. This provides the surface reconstruction impacting surficial populations of CC dimers, CH, CO groups, and COOH termination along with enhanced kinetics of their abstraction, as revealed by high-resolution core-level spectroscopies. A series of local densities of states were computed, showing a rich set of highly occupied and localized surface states for samples deposited in deuterium, negating the connotations of band bending. The introduction of enhanced incorporation of boron into (111) facet of diamond leads to the manifestation of surface electronic states below the Fermi level and above the bulk valence band edge. This unique electronic band structure affects the charge transfer kinetics, electron affinity, and diffusion field geometry critical for efficient electrolysis, electrocatalysis, and photoelectrochemistry

Authors

• dr hab. inż. Michał Sobaszek link open in new tab ,
• dr habil Maria Brzhezinskay,
• mgr inż. Adrian Olejnik link open in new tab ,
• PhD Vincent Mortet,
• Mahebub Alam,
• dr hab. inż. Sawczak Mirosław,
• dr inż. Mateusz Ficek link open in new tab ,
• prof. dr hab. inż. Maria Gazda link open in new tab ,
• PhD Zdenek Weiss,
• dr hab. inż. Robert Bogdanowicz link open in new tab