期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 62, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202215782
关键词
Ammonia Synthesis; Catalytic Reduction of Nitrate; Density Functional Theory; Oxygen Vacancy; Pseudobrookite
In this study, we propose the pseudobrookite Fe2TiO5 nanofiber with abundant oxygen vacancies as a new electrocatalyst for the reduction of nitrate to ammonia. The catalyst exhibited high NH3 yield and Faradaic Efficiency, as well as excellent electrochemical durability and structural stability.
We propose the pseudobrookite Fe2TiO5 nanofiber with abundant oxygen vacancies as a new electrocatalyst to ambiently reduce nitrate to ammonia. Such catalyst achieves a large NH3 yield of 0.73 mmol h(-1) mg(cat.)(-1) and a high Faradaic Efficiency (FE) of 87.6 % in phosphate buffer saline solution with 0.1 M NaNO3, which is lifted to 1.36 mmol h(-1) mg(cat.)(-1) and 96.06 % at -0.9 V vs. RHE for nitrite conversion to ammonia in 0.1 M NaNO2. It also shows excellent electrochemical durability and structural stability. Theoretical calculation reveals the enhanced conductivity of this catalyst and an extremely low free energy of -0.28 eV for nitrate adsorption at the presence of vacant oxygen.
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