Construction of FeCo@N-CNTs heterojunction structures for efficient electrocatalytic cathodic nitrate reduction coupled with anodic HPAM oxidation reactions
Qi L. Liu S. Fu Y.
2026Springer
Carbon Letters
2026
The construction of an electrocatalytic NO3− reduction and polyacrylamide (HPAM) oxidation coupled reaction system represents a promising approach for simultaneously achieving ammonia synthesis and HPAM degradation. In this work, FeCo@N-CNTs with a well-defined heterojunction structure were successfully synthesized and employed as an efficient bifunctional electrocatalyst in the NO3− reduction and HPAM oxidation coupled reaction. In the coupled reaction system, The FeCo@N-CNTs catalyst delivered a maximum ammonia yield rate and Faradaic efficiency of 6097.96 ± 15.83 µg h− 1 mgcat−1 and 92.03 ± 1.48%, respectively, while achieving an HPAM degradation rate of 89.99 ± 0.37% within 2 h. In-situ ATR-SEIRAS and in-situ DEMS analyses identified *NHOH as a key intermediate during the ammonia synthesis process and revealed that the heterojunction structure effectively regulates charge distribution and active-site exposure on the catalyst surface. This study offers a new strategy for designing coupled electrochemical systems toward efficient NO3⁻ reduction and organic pollutant oxidation, providing valuable insights for sustainable nitrogen-cycle conversion and wastewater treatment.
Bimetallic active sites , Coupled reaction , Electrocatalytic NO3− reduction , Heterojunction structure , HPAM degradation
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Shenyang Fire Research Institute of MEM, Shenyang, 110034, China
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Shenyang Fire Research Institute of MEM
Kazakh-British Technical University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026