TY - JOUR
T1 - Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis
AU - Duan, Xinxuan
AU - Sha, Qihao
AU - Li, Pengsong
AU - Li, Tianshui
AU - Yang, Guotao
AU - Liu, Wei
AU - Yu, Ende
AU - Zhou, Daojin
AU - Fang, Jinjie
AU - Chen, Wenxing
AU - Chen, Yizhen
AU - Zheng, Lirong
AU - Liao, Jiangwen
AU - Wang, Zeyu
AU - Li, Yaping
AU - Yang, Hongbin
AU - Zhang, Guoxin
AU - Zhuang, Zhongbin
AU - Hung, Sung Fu
AU - Jing, Changfei
AU - Luo, Jun
AU - Bai, Lu
AU - Dong, Juncai
AU - Xiao, Hai
AU - Liu, Wen
AU - Kuang, Yun
AU - Liu, Bin
AU - Sun, Xiaoming
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85186843285&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-46140-y
DO - 10.1038/s41467-024-46140-y
M3 - Article
C2 - 38438342
AN - SCOPUS:85186843285
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1973
ER -
