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    Electrocatalytic nitrate/nitrite reduction to ammonia synthesis using metal nanocatalysts and bio-inspired metalloenzymes

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    Type
    Article
    Authors
    Wang, Jing
    Feng, Tao
    Chen, Jiaxin
    Ramalingam, Vinoth
    Li, Zhongxiao
    Kabtamu, Daniel Manaye
    He, Jr Hau
    Fang, Xiaosheng
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2021-04-24
    Online Publication Date
    2021-04-24
    Print Publication Date
    2021-08
    Embargo End Date
    2023-05-03
    Submitted Date
    2021-03-16
    Permanent link to this record
    http://hdl.handle.net/10754/669511
    
    Metadata
    Show full item record
    Abstract
    Ammonia (NH3) is attracted as a potential carbon free energy carrier and as important feedstock for most of the fertilizers, chemicals, pharmaceutical related products. NH3 is industrially produced by conventional Haber–Bosch process under harsh experimental conditions (high temperature and high pressure), and this process requires high-energy consumption and produces large amount of CO2 emissions into the atmosphere. Therefore, there is an urgent need to develop an alternative and sustainable route for NH3 production under ambient conditions. Recently, electrocatalytic N2 reduction to NH3 production has attracted as a potential approach, but achieving high NH3 yield and Faradaic efficiency, and avoiding competitive hydrogen-evolution reaction (HER) are still challenging. Nitrate/nitrite (NO3−/NO2−) is the widely reported contaminant for eutrophication and carcinogens, which can be utilized as a nitrogen resource for electrocatalytic NO3−/NO2− reduction to NH3 (NRA) via eight/six-electron transfer process. Unfortunately, electrocatalytic NRA using metal nanomaterials are rarely investigated. In this review, we discuss the electrocatalytic NRA performance containing reactivity, selectivity, Faradaic efficiency and cycling stability of metal nanocatalysts, bio-inspired metalloenzymes and bioelectrochemical system. After this overview, we investigate the key factors, rate-determining step and the reaction mechanism that controlling the NRA performance. Finally, we summarize the challenges and future pathways guiding the design of effective nanomaterials and reaction systems to promote the industrial application of electrocatalytic NRA.
    Citation
    Wang, J., Feng, T., Chen, J., Ramalingam, V., Li, Z., Kabtamu, D. M., … Fang, X. (2021). Electrocatalytic nitrate/nitrite reduction to ammonia synthesis using metal nanocatalysts and bio-inspired metalloenzymes. Nano Energy, 86, 106088. doi:10.1016/j.nanoen.2021.106088
    Sponsors
    The authors would like to thank Zijun Hu and Yihan Chen and for their help with language polish. The authors appreciate the supports from National Key Research and Development Program of China (Grant No. 2017YFA0204600), National Natural Science Foundation of China (Nos. 1201101405 and 51872050), and Science and Technology Commission of Shanghai Municipality (Nos. 19520744300 and 18520744600). Jr-Hau He appreciate the supports from City University of Hong Kong (Grant No. 9380107).
    Publisher
    Elsevier BV
    Journal
    Nano Energy
    DOI
    10.1016/j.nanoen.2021.106088
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S221128552100344X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.nanoen.2021.106088
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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