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Fe-doped Co3O4 nanowire strutted 3D pinewood-derived carbon: A highly selective electrocatalyst for ammonia production via nitrate reduction

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Abstract

Nitrate (NO3−), a nitrogen-containing pollutant, is prevalent in aqueous solutions, contributing to a range of environmental and health-related issues. The electrocatalytic reduction of NO3− holds promise as a sustainable approach to both eliminating NO3− and generating valuable ammonia (NH3). Nevertheless, the reduction reaction of NO3− (NO3−RR), involving 8-electron transfer process, is intricate, necessitating highly efficient electrocatalysts to facilitate the conversion of NO3− to NH3. In this study, Fedoped Co3O4 nanowire strutted three-dimensional (3D) pinewood-derived carbon (Fe-Co3O4/PC) is proposed as a high-efficiency NO3−RR electrocatalyst for NH3 production. Operating within 0.1 M NaOH containing NO3−, Fe-Co3O4/PC demonstrates exceptional performance, obtain an impressively large NH3 yield of 0.55 mmol·h−1·cm−2 and an exceptionally high Faradaic efficiency of 96.5% at −0.5 V, superior to its Co3O4/PC counterpart (0.2 mmol·h−1·cm−2, 73.3%). Furthermore, the study delves into the reaction mechanism of Fe-Co3O4 for NO3−RR through theoretical calculations.

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Authors and Affiliations

  1. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Xuwei Liu, Xun He, Jun Li, Xiaoya Fan, Ting Xie, Xiya Yang, Yonglan Luo & Xuping Sun

  2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 211189, China

    Chaozhen Liu & Feng Gong

  3. College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China

    Zhengwei Cai, Kai Dong, Dongdong Zheng, Shengjun Sun & Xuping Sun

  4. Chemistry Department, Frontier of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

    Sulaiman Alfaifi

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  1. Xuwei Liu
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  2. Chaozhen Liu
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  3. Xun He
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Correspondence to Feng Gong or Xuping Sun.

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Fe-doped Co3O4 nanowire strutted 3D pinewood-derived carbon: A highly selective electrocatalyst for ammonia production via nitrate reduction

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Liu, X., Liu, C., He, X. et al. Fe-doped Co3O4 nanowire strutted 3D pinewood-derived carbon: A highly selective electrocatalyst for ammonia production via nitrate reduction. Nano Res. 17, 2276–2282 (2024). https://doi.org/10.1007/s12274-023-6204-y

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