原位衍生的碳棒封装铋纳米颗粒作为将环境氮还原为氨的高效电催化剂

In Situ Derived Bi Nanoparticles Confined in Carbon Rods as an Efficient Electrocatalyst for Ambient N Reduction to NH.

作者信息

Wang Fengyi, Zhang Longcheng, Wang Ting, Zhang Fang, Liu Qian, Zhao Haitao, Zheng Baozhan, Du Juan, Sun Xuping

机构信息

College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.

出版信息

Inorg Chem. 2021 May 17;60(10):7584-7589. doi: 10.1021/acs.inorgchem.1c01130. Epub 2021 Apr 30.

DOI:10.1021/acs.inorgchem.1c01130

PMID:33929201

Abstract

Electrocatalytic N reduction is deemed as a prospective strategy toward low-carbon and environmentally friendly NH production under mild conditions, but its further application is still plagued by low NH yield and poor faradaic efficiency (FE). Thus, electrocatalysts endowing with high activity and satisfying selectivity are highly needed. Herein, Bi nanoparticles in situ confined in carbon rods (Bi NPs@CRs) are reported, which are fabricated via thermal annealing of a Bi-MOF precursor as a high-efficiency electrocatalyst for artificial NH synthesis with favorable selectivity. Such an electrocatalyst conducted in 0.1 M HCl achieves a high FE of 11.50% and a large NH yield of 20.80 μg h mg at -0.55 and -0.60 V versus reversible hydrogen electrode, respectively, which also possesses high electrochemical durability.

摘要

电催化氮还原被认为是一种在温和条件下实现低碳和环境友好型氨生产的前瞻性策略，但其进一步应用仍受到氨产率低和法拉第效率（FE）差的困扰。因此，迫切需要具有高活性和令人满意选择性的电催化剂。在此，报道了原位限制在碳棒中的铋纳米颗粒（Bi NPs@CRs），它是通过对Bi-MOF前驱体进行热退火制备的，作为一种用于人工合成氨的高效电催化剂，具有良好的选择性。这种在0.1 M HCl中进行的电催化剂，相对于可逆氢电极，在-0.55 V和-0.60 V时分别实现了11.50%的高法拉第效率和20.80 μg h mg的高氨产率，并且还具有高电化学耐久性。