![]() ![]() ![]() Photo-driven oxygen vacancies extends charge carrier lifetime for efficient solar water splitting. Engineering water dissociation sites in MoS 2 nanosheets for accelerated electrocatalytic hydrogen production. Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides. Understanding the roles of oxygen vacancies in hematite-based photoelectrochemical processes. Ni-doped TiO 2 nanotubes photoanode for enhanced photoelectrochemical water splitting. Electrochemical photolysis of water at a semiconductor electrode. Recent advances in semiconductors for photocatalytic and photoelectrochemical water splitting. Layered double hydroxides-based photocatalysts and visible-light driven photodegradation of organic pollutants: A review. Noble metal-metal oxide nanohybrids with tailored nanostructures for efficient solar energy conversion, photocatalysis and environmental remediation. Artificial photosynthesis: Molecular systems for catalytic water oxidation. Semiconductor heterojunction photocatalysts: Design, construction, and photocatalytic performances. This work strikes out on new paths in the formation of an oxygen vacancy-induced phase transition and provides new ideas for the design of catalysts. The enhancement of catalytic activity is attributed to the atomically smooth interface with a highly matched lattice and robust built-in electric field around the phase junction, which leads to a less-defective and abrupt interface and provides a smooth interfacial charge separation and transfer path, leading to improved charge separation and transfer efficiency and a great enhancement in photocatalytic activity. As expected, an optimum PEC activity was achieved over the o-WO 3/m-WO 3 phase junction in WO 3-450 photoelectrode, yielding the maximum O 2 evolution rate roughly 32 times higher than that of pure WO 3-250 without any sacrificial agents under visible light irradiation. The formation of oxygen vacancies causes an imbalance of the charge distribution in the crystal structure, which changes the W-O bond length and bond angle, accelerating the phase transition. In this work, we realized the transition from orthorhombic to monoclinic by regulating the annealing temperatures, and constructed an orthorhombic-monoclinic WO 3 (o-WO 3/m-WO 3) phase junction. Building a phase junction structure with controllable phase transition of WO3 can further improve the photocatalytic performance. Effective charge separation and transfer is deemed to be the contributing factor to achieve high photoelectrochemical (PEC) water splitting performance on photoelectrodes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |