金电极上硝酸盐电化学还原为羟胺

Electrochemical reduction of nitrate to hydroxylamine on gold electrode.

作者信息

Xie Yangshan, De Ras Michiel, Zhao Jiwu, Liu Tianxi, Lai Feili, Hofkens Johan, Roeffaers Maarten B J

机构信息

Centre for Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions, Department of Microbial and Molecular Systems, KU Leuven Celestijnenlaan 200F, 3001 Leuven, Belgium.

Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium.

出版信息

Chem Commun (Camb). 2024 Sep 26;60(78):10918-10921. doi: 10.1039/d4cc03620d.

DOI:10.1039/d4cc03620d

PMID:39254599

Abstract

In this study, we explore the efficacy of gold (Au) as a selective electrocatalyst for the reduction of nitrate to hydroxylamine, a valuable nitrogen-based chemical, while also evaluating the by-product formation of ammonia. We systematically optimized various experimental parameters including nitrate concentration, pH, and applied potential. We found that at an applied potential of -0.7 V RHE in 0.1 M HNO, Au achieves a 230.1 ± 19 μmol NHOH h cm yield, with a 34.2 ± 2.8% faradaic efficiency. This study underscores the potential of Au as an efficient and selective electrocatalyst for generating value-added nitrogen products through an electrochemical pathway.

摘要

在本研究中，我们探究了金（Au）作为一种选择性电催化剂将硝酸盐还原为羟胺（一种有价值的含氮化学品）的效果，同时还评估了副产物氨的生成情况。我们系统地优化了各种实验参数，包括硝酸盐浓度、pH值和外加电势。我们发现，在0.1 M HNO₃中，当外加电势为-0.7 V（相对于可逆氢电极，RHE）时，金实现了230.1±19 μmol NHOH h⁻¹ cm⁻²的产率，法拉第效率为34.2±2.8%。这项研究强调了金作为一种高效且选择性的电催化剂，通过电化学途径生成增值含氮产物的潜力。