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author:

Wang, Y. (Wang, Y..) [1] | Lv, Y. (Lv, Y..) [2] (Scholars:吕源财) | Liu, Y. (Liu, Y..) [3] | Liu, M. (Liu, M..) [4]

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Scopus SCIE

Abstract:

Rapid industrial growth and widespread fertilizer application have led to nitrate contamination in water, threatening ecosystems and human health. There is growing interest in developing electrocatalysts to convert nitrates into ammonia, enabling wastewater recycling and transforming harmful substances into valuable ammonia. In this study, we presented an eco-friendly, cost-effective electrocatalyst suitable for large-scale industrial production. It was designed specifically for the electrochemical reduction of NO3– to NH3 (NO3−RR). Cu2O nanoparticles were synthesized on Cu foam through a simple one-step in situ growth approach. The conversion of Cu+, serving as the active site during NO3−RR, into nanoscale Cu had been investigated. Cu+sites initiated the conversion of nitrate to nitrite and subsequently facilitated the reduction of nitrite to ammonia while being transformed into nano-grained Cu. The newly generated Cu, with a larger specific surface area and lower charge transfer resistance, improved Faradaic efficiency (FE) for NH3 in the NO3−RR process. As a result, an impressive nitrate removal rate of 100 % and a relatively high ammonia yield rate of 1514.67 µg h−1 cm−2, along with a low residue of nitrite-N (0.21 ppm) can be achieved in solutions containing 100 ppm of nitrate-N. © 2025

Keyword:

Ammonia Cu+ active center Electrocatalytic nitrate reduction Low residue of nitrite-N Nano-grained Cu

Community:

  • [ 1 ] [Wang Y.]College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Wang Y.]Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Lv Y.]College of Environment and Safety Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Lv Y.]Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou, 350116, China
  • [ 5 ] [Liu Y.]College of Environment and Safety Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 6 ] [Liu Y.]Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou, 350116, China
  • [ 7 ] [Liu M.]College of Environment and Safety Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 8 ] [Liu M.]Fujian Provincial Technology Exploitation Base of Biomass Resources, Fuzhou University, Fuzhou, 350116, China
  • [ 9 ] [Liu M.]College of Environmental and Biological Engineering, Putian University, Putian, 351100, China

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Source :

Applied Surface Science

ISSN: 0169-4332

Year: 2025

Volume: 699

6 . 3 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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