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Controlled growth of a high selectivity interface for seawater electrolysis

Open access
Gao, Yang, Xue, Yurui, He, Feng, Li, Yuliang·2022·Proceedings of the National Academy of Sciences

Abstract

Overall seawater electrolysis is an important direction for the development of hydrogen energy conversion. The key issues include how to achieve high selectivity, activity, and stability in seawater electrolysis reactions. In this report, the heterostructures of graphdiyne-RhO x-graphdiyne (GDY/RhO x/GDY) were constructed by in situ-controlled growth of GDY on RhO x nanocrystals. A double layer interface of sp-hybridized carbon-oxide-Rhodium (sp-C∼O-Rh) was formed in this system. The microstructures at the interface are composed of active sites of sp-C∼O-Rh. The obvious electron-withdrawing surface enhances the catalytic activity with orders of magnitude, while the GDY outer of the metal oxides guarantees the stability. The electron-donating and withdrawing sp-C∼O-Rh structures enhance the catalytic activity, achieving high-performance overall seawater electrolysis with very small cell voltages of 1.42 and 1.52 V at large current densities of 10 and 500 mA cm−2 at room temperatures and ambient pressures, respectively. The compositional and structural superiority of the GDY-derived sp-C-metal-oxide active center offers great opportunities to engineer tunable redox properties and catalytic performance for seawater electrolysis and beyond. This is a typical successful example of the rational design of catalytic systems.

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Metadata

Authors
Gao, Y., Xue, Y., He, F., & Li, Y.
Venue
Proceedings of the National Academy of Sciences
Published
2022-08-29
Volume
119
Issue
36
Pages
e2206946119-e2206946119
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W4293485572
Cited by
184
References
8
FWCI
7.27
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Controlled growth of a high selectivity interface for seawater electrolysis. https://app.cochat.ai/papers/10.1073/pnas.2206946119
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Gao, Y., Xue, Y., He, F., & Li, Y. (2022). Controlled growth of a high selectivity interface for seawater electrolysis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2206946119

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