Ag/Ti Electrodes for Electrochemical Nitrate Reduction: Revealing Highly Effective Interfaces by In‐Situ Electrochemical Mass Spectrometry
- 1Photocatalytic Synthesis Group Faculty of Science & Technology University of Twente Enschede The Netherlands
- 2Laboratory of Industrial Chemistry Faculty of Chemistry & Biochemistry Ruhr University Bochum Bochum Germany
Abstract
The electrochemical reduction of nitrate to hydroxyl amine or ammonia is a prominent means to effectively valorize agricultural effluent emissions. We demonstrate that bimetallic electrodes, composed of Ag nanoparticles deposited on Ti metal, exhibit a pronounced synergy in nitrate reduction in acidic electrolyte. This is evidenced by in‐situ electrochemical mass spectrometry (EC‐MS), showing NO evolution in a complex potential‐dependent profile at lower onset potentials compared to single metal Ag or Ti electrodes. Furthermore, liquid phase analysis shows a significant Faradaic efficiency to hydroxylamine for Ag/Ti electrodes, even at potentials above 0 VRHE, i.e., requiring at least a 200–300 mV lower overpotential than necessary for the single metal electrodes. We discuss favorable NO and hydroxylamine formation to be occurring on highly effective Ag/Ti interfaces. This work highlights the importance of interfaces and suggests that optimization of (Ag/Ti) bimetallic electrodes appears to be a valuable means to develop high performance electrodes for the reduction of nitrate in acidic conditions.
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BibTeX
@article{rodriguez2026agti,
title = {{Ag/Ti Electrodes for Electrochemical Nitrate Reduction: Revealing Highly Effective Interfaces by In‐Situ Electrochemical Mass Spectrometry}},
author = {Ainoa Paradelo Rodríguez and Alex Kotiagin and Guido Mul and Bastian T. Mei},
journal = {ChemElectroChem},
year = {2026},
month = oct,
doi = {10.1002/celc.70261},
url = {https://doi.org/10.1002/celc.70261},
note = {CC BY},
}
RIS
TY - JOUR
TI - Ag/Ti Electrodes for Electrochemical Nitrate Reduction: Revealing Highly Effective Interfaces by In‐Situ Electrochemical Mass Spectrometry
AU - Ainoa Paradelo Rodríguez
AU - Alex Kotiagin
AU - Guido Mul
AU - Bastian T. Mei
PY - 2026
DA - 2026/10/30
JO - ChemElectroChem
DO - 10.1002/celc.70261
UR - https://doi.org/10.1002/celc.70261
AB - The electrochemical reduction of nitrate to hydroxyl amine or ammonia is a prominent means to effectively valorize agricultural effluent emissions. We demonstrate that bimetallic electrodes, composed of Ag nanoparticles deposited on Ti metal, exhibit a pronounced synergy in nitrate reduction in acidic electrolyte. This is evidenced by in‐situ electrochemical mass spectrometry (EC‐MS), showing NO evolution in a complex potential‐dependent profile at lower onset potentials compared to single metal Ag or Ti electrodes. Furthermore, liquid phase analysis shows a significant Faradaic efficiency to hydroxylamine for Ag/Ti electrodes, even at potentials above 0 VRHE, i.e., requiring at least a 200–300 mV lower overpotential than necessary for the single metal electrodes. We discuss favorable NO and hydroxylamine formation to be occurring on highly effective Ag/Ti interfaces. This work highlights the importance of interfaces and suggests that optimization of (Ag/Ti) bimetallic electrodes appears to be a valuable means to develop high performance electrodes for the reduction of nitrate in acidic conditions.
SN - 2196-0216
ER -