Construction of Frustrated Lewis Pair Sites in CeO-C/BiVO for Photoelectrochemical Nitrate Reduction.

Photoelectrochemical nitrate reduction reaction (PEC NIRR) could convert the harmful pollutant nitrate (NO) to high-value-added ammonia (NH) under mild conditions. However, the catalysts are currently hindered by the low catalytic activity and slow kinetics. Here, we reported a heterostructure composed of CeO and BiVO, and the "frustrated Lewis pairs (FLPs)" concept was introduced for understanding the role of Lewis acids and Lewis bases on PEC NIRR.

ZIF-8 derived ZnO/TiO heterostructure with rich oxygen vacancies for promoting photoelectrochemical water splitting.

Due to the serious recombination of electron-hole and weak photoresponse ability, achieving highly efficient photoelectrochemical (PEC) water splitting activity for TiO photoelectrode has become a key issue. In this paper, we reported a new method for preparing ZnO/TiO photoelectrodes by electrostatic adsorption from zeolitic imidazolate framework-8 (ZIF-8) as the precursor. ZIF-8 was combined with TiO nanorods (NRs) through electrostatic interaction and then calcined to obtain ZnO/TiO heterojunction photoelectrodes with abundant oxygen vacancies (O).