WO3 nanosheets rich in oxygen vacancies for enhanced electrocatalytic N2 reduction to NH3

被引：104

作者：

Kong, Wenhan ^{[1
,2
]}

Zhang, Rong ^{[2
]}

Zhang, Xiaoxue ^{[3
]}

Ji, Lei ^{[2
]}

Yu, Guangsen ^{[2
]}

Wang, Ting ^{[3
]}

Luo, Yonglan ^{[3
]}

Shi, Xifeng ^{[4
]}

Xu, Yuanhong ^{[1
]}

Sun, Xuping ^{[2
]}

机构：

[1] Qingdao Univ, Coll Mat Sci & Engn, Coll Life Sci, Qingdao 266071, Shandong, Peoples R China

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

[3] China West Normal Univ, Chem Synth & Pollut Control Key Lab Sichuan Prov, Coll Chem & Chem Engn, Nanchong 637002, Sichuan, Peoples R China

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

来源：

NANOSCALE | 2019年 / 11卷 / 41期

基金：

中国国家自然科学基金;

关键词：

GRAPHENE OXIDE HYBRID; EFFICIENT ELECTROCATALYST; ATMOSPHERIC-PRESSURE; NITROGEN REDUCTION; LOW-TEMPERATURE; AMBIENT; FIXATION; AMMONIA; DESIGN; WATER;

D O I：

10.1039/c9nr03678d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Haber-Bosch process for industrial-scale NH3 production suffers from harsh conditions and serious CO2 release. Electrochemical N-2 reduction is an alternative approach to synthesize NH3 under ambient conditions, but it requires highly-efficient electrocatalysts for the N-2 reduction reaction (NRR). In this Communication, we demonstrate that WO3 nanosheets rich in oxygen vacancies (R-WO3 NSs) exhibit greatly enhanced NRR performances. In 0.1 M HCl, such R-WO3 NSs achieve a large NH3 yield of 17.28 mu g h(-1) mg(cat.)(-1) and a high faradaic efficiency of 7.0% at -0.3 V vs. a reversible hydrogen electrode, much superior to the WO3 nanosheets deficient in oxygen vacancies (6.47 mu g h(-1) mg(cat.)(-1) and 1.02%). Remarkably, R-WO3 NSs also show high electrochemical stability.

引用

页码：19274 / 19277

页数：4

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