Oxygen Vacancies of Cr-Doped CeO2 Nanorods That Efficiently Enhance the Performance of Electrocatalytic N2 Fixation to NH3 under Ambient Conditions

被引：112

作者：

Xie, Hongtao ^{[1
]}

Wang, Huanbo ^{[2
]}

Geng, Qin ^{[3
]}

Xing, Zhe ^{[3
]}

Wang, Wei ^{[4
,5
]}

Chen, Jiayin ^{[3
]}

Ji, Lei ^{[3
]}

Chang, Le ^{[3
]}

Wang, Zhiming ^{[3
]}

Mao, Jian ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Sichuan, Peoples R China

[2] Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Peoples R China

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

[4] Univ Bergen, Dept Chem, N-5007 Bergen, Norway

[5] Univ Bergen, Ctr Pharm, N-5007 Bergen, Norway

来源：

INORGANIC CHEMISTRY | 2019年 / 58卷 / 09期

关键词：

NITROGEN REDUCTION; ATMOSPHERIC-PRESSURE; AMMONIA-SYNTHESIS; HIGH SELECTIVITY; LOW-TEMPERATURE; CATALYSTS; WATER; CERIA;

D O I：

10.1021/acs.inorgchem.9b00622

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Producing ammonia (NH3) by electrocatalytic N-2 fixation is a promising and environmentally friendly strategy, in comparison to the Haber-Bosch process with high consumption of energy and CO2 emissions. Because of the extremely high bond energy, it is indispensable to explore valid catalysts to activate the triple bond. In this paper, Cr-doped CeO2 nanorods are developed to serve as non-noble-metal electrocatalysts for an electrocatalytic N-2 reduction reaction. Introducing Cr into the catalyst leads to an increase of the oxygen vacancies. In a 0.1 M Na2SO4 solution, the Cr0.1CeO2 nanorods achieve a high Faradaic efficiency (3.84%) and a large NH3 yield (16.82 mu g h(-1) mg(cat.)(-1)) at -0.7 V versus reversible hydrogen electrode. The Cr0.1CeO2 nanorods also exhibit high stability during the reaction.

引用

页码：5423 / 5427

页数：5

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