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doi:10.22028/D291-39828
Title: | Grave-to-cradle upcycling of harmful algal biomass into atomically dispersed iron catalyst for efficient ammonia electrosynthesis from nitrate |
Author(s): | Wang, He Man, Shuaishuai Wang, Han Presser, Volker Yan, Qun Zhang, Yong |
Language: | English |
Title: | Applied Catalysis B: Environmental |
Volume: | 332 |
Publisher/Platform: | Elsevier |
Year of Publication: | 2023 |
Free key words: | Electrochemical nitrate reduction HABs resource utilization Single-atom catalyst Ammonia recovery Biochar |
DDC notations: | 620 Engineering and machine engineering |
Publikation type: | Journal Article |
Abstract: | Electrochemically converting nitrate, widely distributed in industrial wastewater and contaminated water bodies, into ammonia is a promising route for resource recovery and wastewater treatment. Meanwhile, treating harmful algal blooms (HABs) is presented worldwide, are time and resource-consuming, and carries a high CO2 footprint. Rather than considering this carbon and nitrogen-rich biomass as disposable waste, consider it a vast renewable resource. Therefore, this study presents a Fe-dispersed carbon-based catalyst derived from HABs biomass, with a maximum ammonia yield rate of 16449 μg h−1 cm−2 (1.2 mmol h−1 mgcat−1) and NH3 Faradaic efficiency of 87.3%. This catalyst also possessed decent stability with continuous operation over 50 h. Experimental and theoretical calculation results reveal that the Fe-N4 site facilitates electrocatalytic nitrate reduction reaction by reducing the energy barriers of the NO3--to-NH3 pathway. Thus, this strategy of upcycling HABs biomass waste into functional catalysts offers a multipronged approach to renewable and carbon-neutral energy technologies. |
DOI of the first publication: | 10.1016/j.apcatb.2023.122778 |
URL of the first publication: | https://doi.org/10.1016/j.apcatb.2023.122778 |
Link to this record: | urn:nbn:de:bsz:291--ds-398288 hdl:20.500.11880/36087 http://dx.doi.org/10.22028/D291-39828 |
ISSN: | 1873-3883 0926-3373 |
Date of registration: | 10-Jul-2023 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Materialwissenschaft und Werkstofftechnik |
Professorship: | NT - Prof. Dr. Volker Presser |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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