Preparation of M-MOF-74 (M = Ni, Co, Zn) and its performance in electrocatalytic synthesis of ammonia

被引：0

作者：

Yang T. ^{[1
]}

He X. ^{[2
]}

Yin F. ^{[1
,2
]}

机构：

[1] College of Chemical Engineering, Beijing University of Chemical Technology, Beijing

[2] School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, Jiangsu

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 06期

关键词：

Ammonia synthesis; Catalyst; Electrocatalysis; Electrochemistry; Metal-organic frameworks; MOF-74; Nitrogen reduction; SCR;

D O I：

10.11949/0438-1157.20200015

中图分类号：

学科分类号：

摘要：

The conversion of nitrogen rich in nature into ammonia is vital to the development of human society. The electrochemical synthesis of ammonia using nitrogen and water as raw materials has been regarded as a promising and environmentally friendly process. In this work, Ni-, Co- and Zn-MOF-74 were prepared by hydrothermal synthesis, and were characterized by XRD, SEM and XPS. Their catalytic performance was investigated in 0.1 mol•L-1 Na2SO4 electrolyte. The results show that Ni-MOF-74 has better electrocatalytic performance for ammonia synthesis than Zn- and Co-MOF-74 catalysts. Ni-MOF-74 can achieve the high NH3 yield (6.68 × 10-11mol•s-1•cm-2) and high Faraday efficiency (23.69%) at -0.7 V (vs Ag/AgCl). Ni-MOF-74 has not only the small particle size with uniform distribution, but also the greatest number of metal-oxygen bonds and the largest electrochemical specific surface. Specially, Ni-MOF-74 can effectively inhibit hydrogen evolution side effect, which results in enhanced the Faraday efficiency. © All Right Reserved.

引用

页码：2857 / 2870

页数：13

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