Undoped Layered Perovskite Oxynitride Li2LaTa2O6N for Photocatalytic CO2 Reduction with Visible Light
Abstract
Oxynitrides are promising visible‐light‐responsive photocatalysts, but their structures are almost confined with three‐dimensional (3D) structures such as perovskites. A phase‐pure Li2LaTa2O6N with a layered perovskite structure was successfully prepared by thermal ammonolysis of a lithium‐rich oxide precursor. Li2LaTa2O6N exhibited high crystallinity and visible‐light absorption up to 500 nm. As opposed to well‐known 3D oxynitride perovskites, Li2LaTa2O6N supported by a binuclear RuII complex was capable of stably and selectively converting CO2 into formate under visible light (λ>400 nm). Transient absorption spectroscopy indicated that, as compared to 3D oxynitrides, Li2LaTa2O6N possesses a lower density of mid‐gap states that work as recombination centers of photogenerated electron/hole pairs, but a higher density of reactive electrons, which is responsible for the higher photocatalytic performance of this layered oxynitride.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 30, 2018
- Source ID
- 10.1002/anie.201803931
Entities
People
- Akira Yamakata
- Daling Lu
- Hideki Kato
- Hiroshi Kageyama
- Junie Jhon M. Vequizo
- Kanemichi Muraoka
- Kazuhiko Maeda
- Keisuke Hibino
- Ken Sinkou Qin
- Kenta Hongo
- Koji Kimoto
- Kotaro Fujii
- Masato Kakihana
- Masatomo Yashima
- Osamu Ishitani
- Ryo Kuriki
- Ryo Maezono
- Shunsuke Yamashita
- Takayoshi Oshima
- Tom Ichibha
- Tomoki Uchiyama
- Yoshiharu Uchimoto
Organizations
- Air Force Office of Scientific Research
- Japan Advanced Institute of Science and Technology
- Japan Society for the Promotion of Science
- Kyoto University
- Ministry of Education, Culture, Sports, Science and Technology
- National Institute for Materials Science
- RIKEN
- Tohoku University
- Tokyo Institute of Technology
- Toyota
- Toyota Technological Institute