Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)2 Coupled with H2 Production from Seawater

Li Yi; Xu Chen; Yingjie Wen; Haocheng Chen; Sixie Zhang; Hao Yang; Wenbo Li; Lihui Zhou; Beibei Xu; Wenwen Xu; Wanbing Guan; Sheng Dai; Zhiyi Lu

doi:10.1021/acs.nanolett.4c01484

Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)₂ Coupled with H₂ Production from Seawater

Li Yi, Xu Chen, Yingjie Wen, Haocheng Chen, Sixie Zhang, Hao Yang, Wenbo Li, Lihui Zhou, Beibei Xu, Wenwen Xu, Wanbing Guan, Sheng Dai, Zhiyi Lu

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A significant challenge in direct seawater electrolysis is the rapid deactivation of the cathode due to the large scaling of Mg(OH)₂. Herein, we synthesized a Pt-coated highly disordered NiCu alloy (Pt-NiCu alloy) electrode with superior solidophobic behavior, enabling stable hydrogen generation (100 mA cm^-2, >1000 h durability) and simultaneous production of Mg(OH)₂ (>99.0% purity) in electrolyte enriched with Mg²⁺ and Ca²⁺. The unconventional solidophobic property primarily stems from the high surface energy of the NiCu alloy substrate, which facilitates the adsorption of surface water and thereby compels the bulk formation of Mg(OH)₂ via homogeneous nucleation. The discovery of this solidophobic electrode will revolutionarily simplify the existing techniques for seawater electrolysis and increase the economic viability for seawater electrolysis.

Original language	English
Pages (from-to)	5920-5928
Number of pages	9
Journal	Nano Letters
Volume	24
Issue number	19
DOIs	https://doi.org/10.1021/acs.nanolett.4c01484
State	Published - May 15 2024
Externally published	Yes

Keywords

double-product
high disorder alloy
high-purity Mg(OH)
natural seawater electrolysis
solidophobic
surface energy

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10.1021/acs.nanolett.4c01484

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title = "Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)2 Coupled with H2 Production from Seawater",

abstract = "A significant challenge in direct seawater electrolysis is the rapid deactivation of the cathode due to the large scaling of Mg(OH)2. Herein, we synthesized a Pt-coated highly disordered NiCu alloy (Pt-NiCu alloy) electrode with superior solidophobic behavior, enabling stable hydrogen generation (100 mA cm-2, >1000 h durability) and simultaneous production of Mg(OH)2 (>99.0% purity) in electrolyte enriched with Mg2+ and Ca2+. The unconventional solidophobic property primarily stems from the high surface energy of the NiCu alloy substrate, which facilitates the adsorption of surface water and thereby compels the bulk formation of Mg(OH)2 via homogeneous nucleation. The discovery of this solidophobic electrode will revolutionarily simplify the existing techniques for seawater electrolysis and increase the economic viability for seawater electrolysis.",

keywords = "double-product, high disorder alloy, high-purity Mg(OH), natural seawater electrolysis, solidophobic, surface energy",

author = "Li Yi and Xu Chen and Yingjie Wen and Haocheng Chen and Sixie Zhang and Hao Yang and Wenbo Li and Lihui Zhou and Beibei Xu and Wenwen Xu and Wanbing Guan and Sheng Dai and Zhiyi Lu",

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year = "2024",

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doi = "10.1021/acs.nanolett.4c01484",

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T1 - Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)2 Coupled with H2 Production from Seawater

AU - Yi, Li

AU - Chen, Xu

AU - Wen, Yingjie

AU - Chen, Haocheng

AU - Zhang, Sixie

AU - Yang, Hao

AU - Li, Wenbo

AU - Zhou, Lihui

AU - Xu, Beibei

AU - Xu, Wenwen

AU - Guan, Wanbing

AU - Dai, Sheng

AU - Lu, Zhiyi

PY - 2024/5/15

Y1 - 2024/5/15

N2 - A significant challenge in direct seawater electrolysis is the rapid deactivation of the cathode due to the large scaling of Mg(OH)2. Herein, we synthesized a Pt-coated highly disordered NiCu alloy (Pt-NiCu alloy) electrode with superior solidophobic behavior, enabling stable hydrogen generation (100 mA cm-2, >1000 h durability) and simultaneous production of Mg(OH)2 (>99.0% purity) in electrolyte enriched with Mg2+ and Ca2+. The unconventional solidophobic property primarily stems from the high surface energy of the NiCu alloy substrate, which facilitates the adsorption of surface water and thereby compels the bulk formation of Mg(OH)2 via homogeneous nucleation. The discovery of this solidophobic electrode will revolutionarily simplify the existing techniques for seawater electrolysis and increase the economic viability for seawater electrolysis.

AB - A significant challenge in direct seawater electrolysis is the rapid deactivation of the cathode due to the large scaling of Mg(OH)2. Herein, we synthesized a Pt-coated highly disordered NiCu alloy (Pt-NiCu alloy) electrode with superior solidophobic behavior, enabling stable hydrogen generation (100 mA cm-2, >1000 h durability) and simultaneous production of Mg(OH)2 (>99.0% purity) in electrolyte enriched with Mg2+ and Ca2+. The unconventional solidophobic property primarily stems from the high surface energy of the NiCu alloy substrate, which facilitates the adsorption of surface water and thereby compels the bulk formation of Mg(OH)2 via homogeneous nucleation. The discovery of this solidophobic electrode will revolutionarily simplify the existing techniques for seawater electrolysis and increase the economic viability for seawater electrolysis.

KW - double-product

KW - high disorder alloy

KW - high-purity Mg(OH)

KW - natural seawater electrolysis

KW - solidophobic

KW - surface energy

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U2 - 10.1021/acs.nanolett.4c01484

DO - 10.1021/acs.nanolett.4c01484

M3 - Article

C2 - 38708934

AN - SCOPUS:85193268600

SN - 1530-6984

VL - 24

SP - 5920

EP - 5928

JO - Nano Letters

JF - Nano Letters

IS - 19

ER -

Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)₂ Coupled with H₂ Production from Seawater

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Keywords

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