Bioinspired trimesic acid anchored electrocatalysts with unique static and dynamic compatibility for enhanced water oxidation

Xiaojing Lin, Zhaojie Wang (), Shoufu Cao, Yuying Hu, Siyuan Liu (), Xiaodong Chen, Hongyu Chen, Xingheng Zhang, Shuxian Wei, Hui Xu, Zhi Cheng, Qi Hou, Daofeng Sun and Xiaoqing Lu ()
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Xiaojing Lin: China University of Petroleum
Zhaojie Wang: China University of Petroleum
Shoufu Cao: China University of Petroleum
Yuying Hu: China University of Petroleum
Siyuan Liu: China University of Petroleum
Xiaodong Chen: China University of Petroleum
Hongyu Chen: China University of Petroleum
Xingheng Zhang: China University of Petroleum
Shuxian Wei: China University of Petroleum
Hui Xu: China University of Petroleum
Zhi Cheng: China University of Petroleum
Qi Hou: China University of Petroleum
Daofeng Sun: China University of Petroleum
Xiaoqing Lu: China University of Petroleum

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Layered double hydroxides are promising candidates for the electrocatalytic oxygen evolution reaction. Unfortunately, their catalytic kinetics and long-term stabilities are far from satisfactory compared to those of rare metals. Here, we investigate the durability of nickel-iron layered double hydroxides and show that ablation of the lamellar structure due to metal dissolution is the cause of the decreased stability. Inspired by the amino acid residues in photosystem II, we report a strategy using trimesic acid anchors to prepare the subsize nickel-iron layered double hydroxides with kinetics, activity and stability superior to those of commercial catalysts. Fundamental investigations through operando spectroscopy and theoretical calculations reveal that the superaerophobic surface facilitates prompt release of the generated O2 bubbles, and protects the structure of the catalyst. Coupling between the metals and coordinated carboxylates via C‒O‒Fe bonding prevents dissolution of the metal species, which stabilizes the electronic structure by static coordination. In addition, the uncoordinated carboxylates formed by dynamic evolution during oxygen evolution reaction serve as proton ferries to accelerate the oxygen evolution reaction kinetics. This work offers a promising way to achieve breakthroughs in oxygen evolution reaction stability and dynamic performance by introducing functional ligands with static and dynamic compatibilities.

Date: 2023
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DOI: 10.1038/s41467-023-42292-5

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