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  Is direct seawater splitting economically meaningful?

Hausmann, J. N., Schlögl, R., Menezes, P. W., & Driess, M. (2021). Is direct seawater splitting economically meaningful? Energy & Environmental Science, 14(7), 3679-3685. doi:10.1039/d0ee03659e.

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 Creators:
Hausmann, J. Niklas1, Author
Schlögl, Robert2, 3, Author              
Menezes, Prashanth W.1, Author
Driess, Matthias1, Author
Affiliations:
1Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, 10623 Berlin, Germany , ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany , ou_persistent22              

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 Abstract: Electrocatalytic water splitting is the key process for the formation of green fuels for energy transport and storage in a sustainable energy economy. Besides electricity, it requires water, an aspect that seldomly has been considered until recently. As freshwater is a limited resource (<1% of earth's water), lately, plentiful reports were published on direct seawater (around 96.5% of earth's water) splitting without or with additives (buffers or bases). Alternatively, the seawater can be split in two steps, where it is first purified by reverse osmosis and then split in a conventional water electrolyser. This quantitative analysis discusses the challenges of the direct usage of non-purified seawater. Further, herein, we compare the energy requirements and costs of seawater purification with those of conventional water splitting. We find that direct seawater splitting has substantial drawbacks compared to conventional water splitting and bears almost no advantage. In short, it is less promising than the two-step scenario, as the capital and operating costs of water purification are insignificant compared to those of electrolysis of pure water.

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Language(s): eng - English
 Dates: 2020-11-192021-06-082021-06-092021-07-01
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/d0ee03659e
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Title: Energy & Environmental Science
  Abbreviation : Energy Environ. Sci.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: 7 Volume / Issue: 14 (7) Sequence Number: - Start / End Page: 3679 - 3685 Identifier: ISSN: 1754-5692
CoNE: https://pure.mpg.de/cone/journals/resource/1754-5692