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Updated: Jul 26, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Cr3C2 nanoparticles decorated carbon nanofibers for efficient nitrate reduction to ammonia at ambient conditions
Zhihao Zhang1, Tan Wang1, Jun Song Chen2
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China.
Abstract:
Electrochemical nitrate (NO3-) reduction is a promising approach to relieve nitrate pollution and produce value-added ammonia (NH3), but efficient and durable catalysts are required due to the large bond dissociation energy of nitrate and low selectivity. Herein, we propose chromium carbide (Cr3C2) nanoparticles loaded carbon nanofibers (Cr3C2@CNFs) as electrocatalysts to convert nitrate to ammonia. In phosphate buffer saline containing 0.1 mol L-1 NaNO3, such catalyst achieves a large NH3 yield of 25.64 mg h-1 mg-1cat. and a high faradaic efficiency of 90.08% at -1.1 V vs the reversible hydrogen electrode, which also shows excellent electrochemical durability and structural stability. Theoretical calculations reveal the adsorption energy for nitrate at Cr3C2 surfaces reaches -1.92 eV and the potential determining step (*NO→*N) for Cr3C2 hits a low energy increase of 0.38 eV.
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