Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe2TiO5 Nanofibers with Abundant Oxygen Vacancies

被引：136

作者：

Du, Hongting ^{[1
]}

Guo, Haoran ^{[2
]}

Wang, Kaike ^{[1
]}

Du, Xiangning ^{[1
]}

Beshiwork, Bayu Admasu ^{[1
]}

Sun, Shengjun ^{[3
]}

Luo, Yongsong ^{[3
]}

Liu, Qian ^{[4
]}

Li, Tingshuai ^{[1
]}

Sun, Xuping ^{[3
,5
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 611731, Sichuan, Peoples R China

[2] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China

[3] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China

[4] Chengdu Univ, Inst Adv Study, Chengdu 610106, Sichuan, Peoples R China

[5] Shandong Normal Univ, Coll Chem Chem Engn & Mat Sci, Jinan 250014, Shandong, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Ammonia Synthesis; Catalytic Reduction of Nitrate; Density Functional Theory; Oxygen Vacancy; Pseudobrookite;

D O I：

10.1002/anie.202215782

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页数：7

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