Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis

Xinxuan Duan, Qihao Sha, Pengsong Li, Tianshui Li, Guotao Yang, Wei Liu, Ende Yu, Daojin Zhou, Jinjie Fang, Wenxing Chen, Yizhen Chen, Lirong Zheng, Jiangwen Liao, Zeyu Wang, Yaping Li, Hongbin Yang, Guoxin Zhang, Zhongbin Zhuang, Sung-Fu Hung, Changfei Jing, Jun Luo, Lu Bai, Juncai Dong, Hai Xiao, Wen Liu, Yun Kuang (), Bin Liu () and Xiaoming Sun ()
Additional contact information
Xinxuan Duan: Beijing University of Chemical Technology
Qihao Sha: Beijing University of Chemical Technology
Pengsong Li: Chinese Academy of Sciences
Tianshui Li: Beijing University of Chemical Technology
Guotao Yang: Beijing University of Chemical Technology
Wei Liu: Beijing University of Chemical Technology
Ende Yu: Research Institute of Tsinghua University in Shenzhen
Daojin Zhou: Beijing University of Chemical Technology
Jinjie Fang: Beijing University of Chemical Technology
Wenxing Chen: Energy & Catalysis Center, School of Materials Science & Engineering, Beijing Institute of Technology
Yizhen Chen: University of Science and Technology of China
Lirong Zheng: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
Jiangwen Liao: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
Zeyu Wang: Tsinghua University
Yaping Li: Beijing University of Chemical Technology
Hongbin Yang: City University of Hong Kong
Guoxin Zhang: Shandong University of Science and Technology
Zhongbin Zhuang: Beijing University of Chemical Technology
Sung-Fu Hung: National Yang Ming Chiao Tung University
Changfei Jing: Tianjin University of Technology
Jun Luo: University of Electronic Science and Technology of China
Lu Bai: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology
Juncai Dong: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
Hai Xiao: Tsinghua University
Wen Liu: Beijing University of Chemical Technology
Yun Kuang: Beijing University of Chemical Technology
Bin Liu: City University of Hong Kong
Xiaoming Sun: Beijing University of Chemical Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Seawater electrolysis offers a renewable, scalable, and economic means for green hydrogen production. However, anode corrosion by Cl- pose great challenges for its commercialization. Herein, different from conventional catalysts designed to repel Cl- adsorption, we develop an atomic Ir catalyst on cobalt iron layered double hydroxide (Ir/CoFe-LDH) to tailor Cl- adsorption and modulate the electronic structure of the Ir active center, thereby establishing a unique Ir-OH/Cl coordination for alkaline seawater electrolysis. Operando characterizations and theoretical calculations unveil the pivotal role of this coordination state to lower OER activation energy by a factor of 1.93. The Ir/CoFe-LDH exhibits a remarkable oxygen evolution reaction activity (202 mV overpotential and TOF = 7.46 O2 s−1) in 6 M NaOH+2.8 M NaCl, superior over Cl--free 6 M NaOH electrolyte (236 mV overpotential and TOF = 1.05 O2 s−1), with 100% catalytic selectivity and stability at high current densities (400-800 mA cm−2) for more than 1,000 h.

Date: 2024
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DOI: 10.1038/s41467-024-46140-y

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