Electro-synthesis of Ammonia from Dilute Nitric Oxide on a Gas Diffusion Electrode

Seonjeong Cheon; Won June Kim; Dong Yeon Kim; Youngkook Kwon; Jong-In Han

doi:10.1021/acsenergylett.1c02552

journal article·2022-03-11

Electro-synthesis of Ammonia from Dilute Nitric Oxide on a Gas Diffusion Electrode

Seonjeong Cheon, Won June Kim, Dong Yeon Kim, Youngkook Kwon, Jong-In Han

ACS Energy Letters· Volume 7· Issue 3

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Source abstract

Abstract

The electrochemical conversion of nitric oxide (NO) to ammonia (NH3) provides a sustainable route to transform an air pollutant into a value-added chemical. However, the development of NO electroreduction remains hindered by the poor solubility in aqueous electrolytes, requiring the use of concentrated NO. Here, we report a dilute NO reduction using a gas diffusion electrode (GDE) to circumvent the mass transport issue. Through the incorporation of nanoscale zero-valent iron into carbon black on the GDE, 96% NH3 Faradaic efficiency was achieved with 1% NO, and the computational calculations revealed that the Fe catalyzed the breaking of the N–O bond in the H2NO intermediate. The NH3 production rate was accelerated by controlling the concentration of protons in the electrolyte and reached 1239 μmol cm–2 h–1 with 10% NO. Our findings show that the gas-phase electrolysis of dilute NO can offer a practical option for upcycling the waste nitrogen.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Nanomaterials Catalysis & surfaces

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · CO2 Reduction Techniques and Catalysts · Caching and Content Delivery

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

Department of Biology and Chemistry, Changwon National University, Gyeongsangnam-do 51140, Republic of Korea

Carbon Resources Institute, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea

School of Energy and Chemical Engineering and Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea

Funding

Ulsan National Institute of Science and Technology · National Research Foundation of Korea · Korea Institute of Energy Technology Evaluation and Planning

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