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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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Boosting Nitrate Reduction through Ru-CO₃ ^2- Microenvironment Modulated Hydrogen-Bond Networks.

Mengxue Yang¹, Wenzhe Wang¹, Zhiyong Zhao¹

¹MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering Nankai University, Tianjin, 300350, P.R. China.

Angewandte Chemie (International Ed. in English)

|November 17, 2025

Summary

This summary is machine-generated.

Researchers enhanced nitrate reduction to ammonia using anion-modulated microenvironments. This strategy accelerates proton transfer, boosting ammonia synthesis from wastewater efficiently and sustainably.

Keywords:

Electrocatalytic nitrate reduction Hydrogen‐bond network Proton transfer kinetics Ru‐CO32− microenvironment Wastewater resource recovery

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

Area of Science:

Electrochemistry
Catalysis
Environmental Science

Background:

Nitrate (NO3-) rich wastewater poses environmental challenges.
Electrocatalytic reduction to ammonia (NH3) is a sustainable synthesis strategy.
Slow proton transfer kinetics hinder electrocatalytic activity and selectivity.

Purpose of the Study:

To develop a method for accelerating proton transfer in nitrate electrocatalytic reduction.
To enhance ammonia synthesis efficiency and selectivity.
To investigate anion-modulated microenvironments for interfacial regulation.

Main Methods:

Constructing anion (CO3^2-)-modulated microenvironments around single-atom ruthenium (Ru) sites.
Modulating electrolyte composition to create a Ru-CO3^2- microenvironment.
Utilizing an integrated electrocatalytic system.

Main Results:

Achieved NH3 production rate of 76.36 mg·h^-1·mg_cat.^-1.
Exceeded 90% Faradaic efficiency for nitrate reduction reaction (NO3RR).
Facilitated a highly interconnected hydrogen-bond (H-bond) network, promoting proton transfer.

Conclusions:

Anion-modulated microenvironments effectively accelerate proton transfer kinetics.
This strategy significantly enhances electrocatalytic performance for NH3 synthesis.
Offers a cost-effective and practical approach for wastewater valorization.