Lewis Acid Sites in Hollow Cobalt Phytate Micropolyhedra Promote the Electrocatalytic Water Oxidation
Year: 2024
Type: article
Abstract: The acid‐base microenvironment of the metal center is crucial for constructing advanced oxygen evolution reaction (OER) electrocatalysts. However, the correlation between acidic site and OER performance remains unclear for cobalt‐based catalysts. Herein, Lewis acid sites in hollow cobalt phytate micropolyhedra (M–CoPA, M = Cu, Sr) were synthesized by a cation‐exchange strategy, and their OER performances were studied systematically. Experimentally, Lewis acid Cu2+ sites with stronger Lewis acidity exhibited superior intrinsic activity and long‐term stability in alkaline electrolytes. The spectroscopic and electrochemical studies show Lewis acid sites in hollow cobalt phytate micropolyhedra can modulate the electronic distribution of the adjacent cobalt center and further optimize the adsorption strength of oxygenated species. This study figures out the effect of Lewis acid sites on the OER kinetics and provides an effective way to develop high‐efficiency electrocatalysts for energy conversion systems.
Source: ChemSusChem
Authors: Jing Qi, Qizhen Chen, Ying Gao, Yajing Zhao, Shengbo Gao, Enbo Shangguan, Mingxing Chen
Institution: Henan Normal University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1355530544, G7475790733
OpenAlex ID: W4404145093