Photocatalytic Water Splitting over Highly Donor-Doped (110) Layered Perovskites

• Published in: Journal of catalysis Vol. 193; no. 1; pp. 40 - 48
• Main Authors: Hwang, Dong Won, Kim, Hyun Gyu, Kim, Jindo, Cha, Kyung Yong, Kim, Young Gul, Lee, Jae Sung
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.07.2000; Elsevier
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; high donor concentration; layered perovskites; overall water splitting; photocatalyst; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); layered perovskites; photocatalyst; high donor concentration; overall water splitting; Ternary compound; Water; Scanning electron microscopy; Perovskite type compound; Transition metal Compounds; Photocatalysis; Quantum yield; Alkaline earth metal Compounds; Ultraviolet radiation; Transmission electron microscopy; Niobium Oxides; Nickel; Strontium Oxides
• ISSN: 0021-9517; 1090-2694
• DOI: 10.1006/jcat.2000.2875

Highly donor-doped (110) layered perovskite materials loaded with nickel are efficient photocatalysts for overall water splitting with photon yields as high as 23% under UV irradiation. These novel photocatalysts are a series of homologous structures with a generic composition of AmBmO3m+2 (m=4, 5; A=Ca, Sr, La; B=Nb, Ti). The high electron density of these donor-rich materials would create a narrower charge depletion region of the semiconductor and an increased band bending, which allow more efficient electron-hole separation and higher quantum yields than undoped materials. Effects of catalyst preparation conditions are discussed on photocatalytic activity in water splitting.