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Electrocatalytic Acetylene Hydrogenation in Concentrated Seawater at Industrial Current Densities

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dc.contributor.authorHuang, L.
dc.contributor.authorBao, D.
dc.contributor.authorJiang, Y.
dc.contributor.authorZheng, Y.
dc.contributor.authorQiao, S.-Z.
dc.date.issued2024
dc.description.abstractElectrocatalytic acetylene hydrogenation to ethylene (E-AHE) is a promising alternative for thermal-catalytic process, yet it suffers from low current densities and efficiency. Here, we achieved a 71.2 % Faradaic efficiency (FE) of E-AHE at a large partial current density of 1.0 A cm<sup>-2</sup> using concentrated seawater as an electrolyte, which can be recycled from the brine waste (0.96 M NaCl) of alkaline seawater electrolysis (ASE). Mechanistic studies unveiled that cation of concentrated seawater dynamically prompted unsaturated interfacial water dissociation to provide protons for enhanced E-AHE. As a result, compared with freshwater, a twofold increase of FE of E-AHE was achieved on concentrated seawater-based electrolysis. We also demonstrated an integrated system of ASE and E-AHE for hydrogen and ethylene production, in which the obtained brine output from ASE was directly fed into E-AHE process without any further treatment for continuously cyclic operations. This innovative system delivered outstanding FE and selectivity of ethylene surpassed 97.0 % and 97.5 % across wide-industrial current density range (≤ 0.6 A cm<sup>-2</sup>), respectively. This work provides a significant advance of electrocatalytic ethylene production coupling with brine refining of seawater electrolysis.
dc.description.statementofresponsibilityLinsen Huang, Deyu Bao, Yunling Jiang, Yao Zheng, and Shi-Zhang Qiao
dc.identifier.citationAngewandte Chemie International Edition, 2024; 63(32):e202405943-1-e202405943-6
dc.identifier.doi10.1002/anie.202405943
dc.identifier.issn1433-7851
dc.identifier.issn1433-7851
dc.identifier.orcidJiang, Y. [0000-0002-7545-2891]
dc.identifier.orcidZheng, Y. [0000-0002-2411-8041]
dc.identifier.orcidQiao, S.-Z. [0000-0002-1220-1761] [0000-0002-4568-8422]
dc.identifier.urihttps://hdl.handle.net/2440/143005
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/FT200100062
dc.relation.granthttp://purl.org/au-research/grants/arc/LP210301397
dc.relation.granthttp://purl.org/au-research/grants/arc/CE230100032
dc.relation.granthttp://purl.org/au-research/grants/arc/DP230102027
dc.rights© 2024 The Authors. Angewandte Chemie International Edition published by Wiley-V. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.source.urihttp://dx.doi.org/10.1002/anie.202405943
dc.subjectbrine
dc.subjectelectrocatalytic acetylene hydrogenation
dc.subjectindustrial current density
dc.subjectseawater electrolysis
dc.titleElectrocatalytic Acetylene Hydrogenation in Concentrated Seawater at Industrial Current Densities
dc.typeJournal article
pubs.publication-statusPublished

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