Enhanced ammonia synthesis activity of Ru-supported cerium-lanthanum oxide induced by Ti substitution forming mesopores

Yoshihiro Goto; Masashi Kikugawa; Keisuke Kobayashi; Tetsuya Nanba; Hideyuki Matsumoto; Kiyoshi Yamazaki; Mitsuru Matsumoto; Haruo Imagawa

doi:10.1039/d1cc07014b

Enhanced ammonia synthesis activity of Ru-supported cerium-lanthanum oxide induced by Ti substitution forming mesopores

Chem Commun (Camb). 2022 Mar 3;58(19):3210-3213. doi: 10.1039/d1cc07014b.

Authors

Yoshihiro Goto¹, Masashi Kikugawa¹, Keisuke Kobayashi², Tetsuya Nanba², Hideyuki Matsumoto^{2

3}, Kiyoshi Yamazaki¹, Mitsuru Matsumoto¹, Haruo Imagawa¹

Affiliations

¹ Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan. yoshihiro-goto@mosk.tytlabs.co.jp.
² Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima 963-0298, Japan.
³ Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.

PMID: 35174825
DOI: 10.1039/d1cc07014b

Abstract

Ru/Ce_0.5La_0.5-xTi_xO_1.75+0.5x solid solutions with cubic fluorite structure were successfully synthesized via the polymerized complex method. While the Ti substitution enhanced Ce⁴⁺ reducibility by compensating for oxygen vacancies, the reducibility showed no correlation with ammonia synthesis activity. However, Ru/Ce_0.5La_0.4Ti_0.1O_1.8 showed the highest activity originating from the facilitated formation of mesopores.