催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (7): 556-558.

• 研究快讯 • 上一篇    下一篇

可见光作用下LaTaON2催化剂光催化分解水制氢

刘美英1,由万胜1,雷志斌1,高田冈2,堂免一成2,李灿1   

  1. 1 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连116023; 2 东京大学工学系研究科, 东京113-8656, 日本
  • 收稿日期:2006-07-25 出版日期:2006-07-25 发布日期:2006-07-25

Photocatalytic Water Splitting to Hydrogen over a Visible Light-Driven LaTaON2 Catalyst

LIU Meiying1, YOU Wansheng1, LEI Zhibin1, Tuyoshi TAKATA2, Kazunari DOMEN2*, LI Can1*   

  1. 1 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Department of Chemical System Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • Received:2006-07-25 Online:2006-07-25 Published:2006-07-25

PDF

1085

被引次数

67

摘要： 采用高温氮化技术,以氯化铵为矿化剂合成了层状钙钛矿型LaTaON2光催化剂. 与前驱体氧化物LaTaO4相比, LaTaON2的吸收边红移,在可见区呈现较强的吸收. 在可见光作用下,乙醇为牺牲剂时,同时负载Pt和Ru的LaTaON2能催化分解水放出H2, 且其光催化产氢效率大大高于单独负载Pt或Ru的LaTaON2催化剂.

关键词: 高温氮化, 镧, 钽, 氮氧化物, 铂, 钌, 可见光, 光催化, 水分解, 氢

Abstract: LaTaON2 with a perovskite structure has been successfully prepared by a high-temperature ammonolysis technique using NH4Cl as the mineralizer. The optical absorption edge of LaTaON2 is significantly red-shifted compared to that of LaTaO4. Under visible light irradiation, LaTaON2 with Pt or Ru as a co-catalyst shows high activity for reduction of water to H2 in the presence of ethanol as a sacrificial electron reagent. A remarkable improvement in production efficiency was observed when both Pt and Ru are present.

Key words: high-temperature ammonolysis, lanthanum, tantalum, oxynitride, platinum, ruthenium, visible light, photocatalysis, water splitting, hydrogen