Электронный каталог

Статья

Phan, P.D.M.
Alkaline-Metal Ions at Defective Sites of g-C&sub(3)N&sub(4) for Piezo-Photocatalytic Production of H&sub(2)O&sub(2) from Pure Water / P.D.M.Phan, Tiep Van Nguyen, E.Korneeva, [a.o.]. – Next : electronic // Applied Surface Science. – 2026. – Vol. 736. – P. 166762. – URL: https://doi.org/10.1016/j.apsusc.2026.166762. – Bibliogr.: 48.

The evolution of active sites under operating conditions is of importance for catalysis. Here, we reported the highest probability of mobilizing both in-plane and interlayer structures of lithium (Li) when being doped to g-C&sub(3)N&sub(4) lattices. Li-doped g-C&sub(3)N&sub(4) demonstrates a better production rate of H&sub(2)O&sub(2) via piezo-photocatalysis at 5 mmol g&sup(-1)h&sup(−1) compared to that of pristine g-C&sub(3)N&sub(4) at 2.5 mmol g&sup(-1)h&sup(−1) in oxygen-saturated water. Based on the kinetic model, the pristine g-C&sub(3)N&sub(4) demonstrates a linear function between the concentration of H&sub(2)O&sub(2) versus time, while the Li-doped sample follows a linear-exponential function, where the exponential part can be assigned to the changes in the mobility of Li in g-C&sub(3)N&sub(4) modifying the active sites, leading to the changes in charge separation and transportation under irradiations. Furthermore, the results from theoretical calculations combined with positron annihilation spectroscopies support the hypothesis. Therefore, enhanced activity in the production of H&sub(2)O&sub(2) from alkaline metal-doped g-C&sub(3)N&sub(4) might be related to the mobility of dopants under reaction conditions. The finding offers new insights into the role of dopants in accelerating the reaction rate on g-C&sub(3)N&sub(4), benefiting not only on understanding the structure-catalytic relationship but also on designing better catalysts for practical applications.



Спец.(статьи,препринты) = С 44 - Аналитическая химия
ОИЯИ = ОИЯИ (JINR)2026