A wide visible light driven complex perovskite Ba(Mg1/3Ta2/3)O3-xNy photocatalyst for water oxidation and reduction

被引:21
作者
Cui, Junyan [1 ,2 ]
Liu, Taifeng [2 ]
Qi, Yu [2 ]
Zhao, Dan [2 ]
Jia, Mingjun [1 ]
Liu, Gang [1 ]
Zhang, Fuxiang [2 ]
Li, Can [2 ]
机构
[1] Jilin Univ, Coll Chem, Key Lab Surface & Interface Chem Jilin Prov, Changchun 130012, Jilin, Peoples R China
[2] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Key Lab Catalysis, iChEM,Dalian Inst Chem Phys, Dalian 116023, Peoples R China
基金
中国国家自然科学基金;
关键词
Z-SCHEME; NITROGEN; IRRADIATION; HYDROGEN; ENERGY; OXIDES; OXYGEN; PLATINUM; BATIO3; STATE;
D O I
10.1039/c7ta05879a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of potential photocatalysts that can harvest visible light and drive the two half reactions of water splitting is of vital importance in solar energy utilization. Here we report a new deep nitrogen-doped complex perovskite metal oxide Ba(Mg1/3Ta2/3)O3-xNy (denoted as BMTON) that shows a wide visible light response with an absorption edge of ca. 560 nm rather than a shoulder absorption. Various characterizations indicate that the greatly extended light absorption is mainly ascribed to the efficient nitrogen doping into the oxide precursor Ba(Mg1/3Ta2/3)O-3 (denoted as BMTO) that can be simply understood as lattice Mg partly substituted BaTaOx. Meanwhile, theoretical results demonstrate that the weakened Ta-O bonds of the oxide precursor by the substitution of Mg atoms with lower electronegativity than Ta atoms are responsible for the enhanced nitrogen permeation. After loading of cocatalysts Pt or CoOx, BMTON is active for H-2 and O-2 evolution under visible light irradiation in the presence of CH3OH and AgNO3, respectively. This work may open a new avenue to prepare nitrogendoped metal oxides with wide visible light utilization for potential solar energy conversion by choosing suitable precursor oxides for nitridation.
引用
收藏
页码:18870 / 18877
页数:8
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