Ambient electrosynthesis of NH3 from N2 using Bi-doped cube as electrocatalyst

被引：15

作者：

Cao, Ning ^{[1
]}

Liu, Yinhua ^{[2
]}

Xu, Xi ^{[3
]}

Xu, Yangsen ^{[1
]}

Wang, Xianfen ^{[1
]}

Bi, Lei ^{[4
]}

机构：

[1] Qingdao Univ, Coll Mat Sci & Engn, Inst Mat Energy & Environm, Ningxia Rd 308, Qingdao 266071, Peoples R China

[2] Qingdao Univ, Inst Future, Ningxia Rd 308, Qingdao 266071, Peoples R China

[3] Imperial Coll London, Dept Mat, Prince Consort Rd, London SW7 2BP, England

[4] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 62期

基金：

中国国家自然科学基金;

关键词：

Nitrogen reduction reaction (NRR); Bi-doped CeO2; Selective surface; Nanocubes; First principle calculations; OXIDE FUEL-CELLS; NITROGEN-FIXATION; AMMONIA-SYNTHESIS; REDUCTION; CATHODE; WATER; STATE; CEO2;

D O I：

10.1016/j.ijhydene.2021.07.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis of ammonia (NH3) from electrochemical nitrogen reduction reaction (NRR) under environmental conditions is a promising technology. Compared with the traditional artificial nitrogen fixation process by the Haber-Bosch process, electrochemical nitrogen reduction reaction (NRR) requires no harsh reaction conditions. In this work, we report that Bi-doped CeO2 nanocubes show high NRR activity as electrocatalysts. The NH3 yield of 17.83 mu gh(-1) mg(cat)(-1). and the Faradaic Efficiency (FE) of 1.61% at -0.9 V are achieved in 0.1 M Na2SO4. The performance is much higher than that for the traditional CeO2 nanoparticles. The detailed analysis indicates that both the Bi doping and the cube morphology are critical for this encouraging NRR performance. The mechanism for improving NRR is further explored with first-principle calculations, demonstrating the importance of Bi-doping for performance enhancement. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：31523 / 31532

页数：10

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