We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A corrosion-resistant RuMoNi catalyst for efficient and long-lasting seawater oxidation and anion exchange membrane electrolyzer.
- Authors
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
- Abstract
Direct seawater electrolysis is promising for sustainable hydrogen gas (H2) 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 1000 mA cm−2 at 1.72 V. The calculated price per gallon of gasoline equivalent (GGE) of the H2 produced is $ 0.85, which is lower than the 2026 technical target of $ 2.0/GGE set by the United Stated Department of Energy, thus, suggesting practicability of the technology. Direct seawater electrolysis is promising for sustainable hydrogen production but suffers severe side reactions and corrosion. Here, the authors report a corrosion-resistant electrocatalyst with in situ-formed chloride-ion-repelling cation layer for efficient and long-lasting seawater oxidation.
- Subjects
ION-permeable membranes; CHLORIDE ions; SEAWATER; SALINE water conversion; SUSTAINABILITY; ABATEMENT (Atmospheric chemistry); CATALYSTS; OXIDATION
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-39386-5