Issue 26, 2024

Copper rhodium nanosheet alloy for electrochemical NO reduction reaction via selective intermediate adsorption

Abstract

Electrochemical nitric oxide reduction reaction (eNORR) is regarded a promising strategy for NO removal and NH3 synthesis. However, current electrocatalysts for NORR encounter problems of low activity and selectivity, also facing the challenge of avoiding competitive hydrogen evolution reaction (HER). Herein, we designed and fabricated CuRh metal alloy nanosheets based on a facile solvothermal method for selective NH2OH* adsorption in eNORR. In situ FTIR spectroscopy revealed that the CuRh nanosheets (CuRh NSs) enhanced the adsorption of NH2OH*, thus promoting the generation of NH4+. CuRh NSs exhibited efficient NORR catalysis with a high faradaic efficiency (FE) of 93.1% and an ammonia yield of 436 μmol h−1 cm−2 at −0.6 V vs. RHE. Our work demonstrated that the introduction of Rh could regulate the electronic structure of Cu in CuRh NSs, optimizing its adsorption ability towards NH2OH*, and improving the catalytic selectivity for ammonia synthesis via eNORR.

Graphical abstract: Copper rhodium nanosheet alloy for electrochemical NO reduction reaction via selective intermediate adsorption

Supplementary files

Article information

Article type
Paper
Submitted
04 Apr 2024
Accepted
11 May 2024
First published
13 May 2024

J. Mater. Chem. A, 2024,12, 15651-15657

Copper rhodium nanosheet alloy for electrochemical NO reduction reaction via selective intermediate adsorption

Y. Zhang, J. Zhang, F. Peng, H. Yang, Z. Gu and H. Sun, J. Mater. Chem. A, 2024, 12, 15651 DOI: 10.1039/D4TA02306D

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