A corrosion-resistant RuMoNi catalyst for efficient and long-lasting seawater oxidation and anion exchange membrane electrolyzer

Kang, Xin; Yang, Fengning; Zhang, Zhiyuan; Liu, Heming; Ge, Shiyu; Hu, Shuqi; Li, Shaohai; Luo, Yuting; Yu, Qiangmin; Liu, Zhibo; Wang, Qiang; Ren, Wencai; Sun, Chenghua; Cheng, Hui–Ming; Liu, Bilu

doi:10.1038/s41467-023-39386-5

articleNature CommunicationsJun 17, 2023GOLD OA

A corrosion-resistant RuMoNi catalyst for efficient and long-lasting seawater oxidation and anion exchange membrane electrolyzer

XKXin Kang FYFengning Yang ZZZhiyuan Zhang HLHeming Liu SGShiyu Ge

Tsinghua–Berkeley Shenzhen Institute · Tsinghua University · +6 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

Abstract Direct seawater electrolysis is promising for sustainable hydrogen gas (H 2 ) production. However, the chloride ions in seawater lead to side reactions and corrosion, which result in a low efficiency and poor stability of the electrocatalyst and hinder the use of seawater electrolysis technology. Here we report a corrosion-resistant RuMoNi electrocatalyst, in which the in situ-formed molybdate ions on its surface repel chloride ions. The electrocatalyst works stably for over 3000 h at a high current density of 500 mA cm −2 in alkaline seawater electrolytes. Using the RuMoNi catalyst in an anion exchange membrane electrolyzer, we report an energy conversion efficiency of 77.9% and a current density of…

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Topics

Keywords

Electrolysis
Seawater
Electrocatalyst
Electrolyte
Inorganic chemistry
Corrosion
Anode
Chloride

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