Next Article in Journal
Advancing BiVO4 Photoanode Activity for Ethylene Glycol Oxidation via Strategic pH Control
Previous Article in Journal
Cosmetic Products with Potential Photoprotective Effects Based on Natural Compounds Extracted from Waste of the Winemaking Industry
Previous Article in Special Issue
Catalytic Oxidation of Benzene over Atomic Active Site AgNi/BCN Catalysts at Room Temperature
 
 
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Molybdenum−Modified Titanium Dioxide Nanotube Arrays as an Efficient Electrode for the Electroreduction of Nitrate to Ammonia

by
Huixi Chen
,
Wenqi Hu
,
Tingting Ma
,
Yixuan Pu
,
Senhao Wang
,
Yuan Wang
* and
Shaojun Yuan
*
Low-Carbon Technology & Chemical Reaction Engineering Labaratory, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
*
Authors to whom correspondence should be addressed.
Molecules 2024, 29(12), 2782; https://doi.org/10.3390/molecules29122782
Submission received: 12 May 2024 / Revised: 4 June 2024 / Accepted: 8 June 2024 / Published: 11 June 2024
(This article belongs to the Special Issue Nano Environmental Materials II)

Abstract

Electrochemical nitrate reduction (NO3RR) has been recognized as a promising strategy for sustainable ammonia (NH3) production due to its environmental friendliness and economical nature. However, the NO3RR reaction involves an eight−electron coupled proton transfer process with many by−products and low Faraday efficiency. In this work, a molybdenum oxide (MoOx)−decorated titanium dioxide nanotube on Ti foil (Mo/TiO2) was prepared by means of an electrodeposition and calcination process. The structure of MoOx can be controlled by regulating the concentration of molybdate during the electrodeposition process, which can further influence the electron transfer from Ti to Mo atoms, and enhance the binding energy of intermediate species in NO3RR. The optimized Mo/TiO2−M with more Mo(IV) sites exhibited a better activity for NO3RR. The Mo/TiO2−M electrode delivered a NH3 yield of 5.18 mg h−1 cm−2 at −1.7 V vs. Ag/AgCl, and exhibited a Faraday efficiency of 88.05% at −1.4 V vs. Ag/AgCl. In addition, the cycling test demonstrated that the Mo/TiO2−M electrode possessed a good stability. This work not only provides an attractive electrode material, but also offers new insights into the rational design of catalysts for NO3RR.
Keywords: electrochemical nitrate reduction; NH3; MoOx; nanotube arrays; electrodeposition electrochemical nitrate reduction; NH3; MoOx; nanotube arrays; electrodeposition

Share and Cite

MDPI and ACS Style

Chen, H.; Hu, W.; Ma, T.; Pu, Y.; Wang, S.; Wang, Y.; Yuan, S. Molybdenum−Modified Titanium Dioxide Nanotube Arrays as an Efficient Electrode for the Electroreduction of Nitrate to Ammonia. Molecules 2024, 29, 2782. https://doi.org/10.3390/molecules29122782

AMA Style

Chen H, Hu W, Ma T, Pu Y, Wang S, Wang Y, Yuan S. Molybdenum−Modified Titanium Dioxide Nanotube Arrays as an Efficient Electrode for the Electroreduction of Nitrate to Ammonia. Molecules. 2024; 29(12):2782. https://doi.org/10.3390/molecules29122782

Chicago/Turabian Style

Chen, Huixi, Wenqi Hu, Tingting Ma, Yixuan Pu, Senhao Wang, Yuan Wang, and Shaojun Yuan. 2024. "Molybdenum−Modified Titanium Dioxide Nanotube Arrays as an Efficient Electrode for the Electroreduction of Nitrate to Ammonia" Molecules 29, no. 12: 2782. https://doi.org/10.3390/molecules29122782

Article Metrics

Back to TopTop