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Updated: Jun 2, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Main-Group Sn Single Atoms on MoS2- for Selective Nitrite Electroreduction to Ammonia
Peng Guo1, Xindong Wang1, Yufei Wang2
1School of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou 451191, China.
Abstract:
Electrocatalytic NO2--to-NH3 reduction (NO2RR) offers an attractive way to remedy polluted NO2- and produce value-added NH3. In this study, main-group Sn single atoms anchored on S-vacancy-rich MoS2- (Sn1/MoS2-) are explored as a highly selective NO2RR catalyst. Combined theoretical computations and in situ spectroscopic measurements reveal that the isolated Sn1 sites of Sn1/MoS2- can not only promote NO2--to-NH3 activation and hydrogenation but also favor NH3 desorption and restrict H adsorption, thus enabling a highly selective NO2RR for NH3 synthesis. Remarkably, Sn1/MoS2- exhibits an NH3-Faradaic efficiency of 98.8% and an NH3 yield rate of 1922.3 μmol h-1 cm-2 in a flow cell, outperforming most of the NO2RR catalysts reported to date.
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