Amorphous high-entropy phosphate as passivation layer by inhibiting adsorption of chloride ions toward highly durable self-supporting electrode for enhanced seawater electrolysis

被引：0

作者：

Zhang, Qian ^{[1
]}

Song, Yu ^{[1
]}

Liu, Qiancheng ^{[1
]}

Zhao, Feng ^{[1
]}

Gao, Taotao ^{[1
]}

Yang, Xulin ^{[2
]}

Zhu, Jie ^{[1
,3
]}

Yang, Sudong ^{[1
,3
]}

Chen, Lin ^{[1
,3
]}

Li, Shulong ^{[1
,4
,5
]}

Feng, Wei ^{[1
,2
]}

Zhao, Peng ^{[1
]}

机构：

[1] Chengdu Univ, Inst Adv Study, Chengdu 610106, Sichuan, Peoples R China

[2] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Sichuan, Peoples R China

[3] Chengdu Univ, Coll Food & Biol Engn, Chengdu 610106, Sichuan, Peoples R China

[4] Western Superconducting Technol Co Ltd, Xian 710018, Peoples R China

[5] Univ Elect Sci & Technol China, Sch Phys, Chengdu 611700, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2025年 / 692卷

基金：

中国博士后科学基金;

关键词：

High-entropy alloys; Seawater electrocatalysis; Amorphouslike phosphate layer; High corrosion resistance; SITU ELECTROCHEMICAL OXIDATION; EFFICIENT; EVOLUTION; CORROSION; ALLOYS;

D O I：

10.1016/j.jcis.2025.137476

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Seawater electrocatalysis is an attractive technique for sustainable energy production, but the challenge of catalyst corrosion by Cl and stability needs to be addressed. High-entropy alloys (HEAs) attracted much attention for energy conversion in seawater electrocatalysis, due to high strength, stability, and corrosion resistance. Herein, the bilayered CrCoNiFe-P electrode composed of CrCoNiFe alloy substrate and phosphate modification layer (30 nm) is constructed by using vacuum arc-melting and anodic oxidation methods. The amorphouslike phosphate layer (30 nm) not only acts as a passivation layer, enhancing the corrosion resistance and inhibiting the Cl adsorption, but also acts as the catalytic active layer, enhancing the catalytic performance. Theoretical studies demonstrate that the PO43 doping optimizes the d-band structure, reduces the free energy of the rate-determining step and inhibits adsorption of Cl . Benefiting from the bilayered structure and constructed surface, for oxygen evolution reaction (OER), the overpotential required to reach 10 mA cm 2 is only 290 mV. In addition, During the long-term testing at 10 mA cm 2, the potential presents only decreased by 2.7 % after 350 h in 1 M KOH with 0.5 M NaCl. The voltage of CrCoNiFe-10||Pt to reach 10 mA cm-2 is only 1.522 V. These findings offer a facile strategy for electrodes with high corrosion resistance and catalytic activity for energy conversion in seawater.

引用

页数：11