A rigorous electrochemical ammonia electrolysis protocol with in operando quantitative analysis
| Autor: | Hyoi Jo, Hyung-Ki Min, Youngheon Choi, Myung Gi Seo, Arim Seong, Jeongwon Kim, Minzae Lee, Guntae Kim, Yejin Yang |
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| Rok vydání: | 2021 |
| Předmět: |
Electrolysis
Materials science Hydrogen Electrolysis of water Renewable Energy Sustainability and the Environment Oxygen evolution chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis Hydrogen storage Ammonia chemistry.chemical_compound chemistry Chemical engineering law General Materials Science 0210 nano-technology Hydrogen production |
| Zdroj: | Journal of Materials Chemistry A. 9:11571-11579 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Ammonia has emerged as an attractive liquid fuel for hydrogen production owing to its facile transportation, high capacity of hydrogen storage, and ecofriendly environmental products (N2 and H2). Moreover, the electrolysis of ammonia to produce nitrogen and hydrogen only requires an external voltage of 0.06 V theoretically, which is much lower than the energy needed for water electrolysis (1.23 V). In this study, we propose a well-established procedure using in operando gas chromatography that enables us to reliably compare and evaluate the new catalyst for ammonia oxidation. With the protocol, we could distinguish in detail the competitive oxidation reaction between the ammonia oxidation and oxygen evolution reactions with real-time monitoring. Using a flower-like electrodeposited Pt catalyst, we have efficiently produced hydrogen with less power consumption of 734 LH2 kW h−1, which is significantly lower than that of the water-splitting process (242 LH2 kW h−1). The use of this rigorous protocol should help to evaluate the practical performances for ammonia oxidation, thus enabling the field to focus on viable pathways towards the practical electrochemical oxidation of ammonia to hydrogen. |
| Databáze: | OpenAIRE |
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