近日，课题组博士生林小靖论文“Two Birds with One Stone: Contemporaneously Boosting OER Activity and Kinetics for Layered Double Hydroxide Inspired by Photosystem II”被Advanced Functional Materials（2021年中科院SCI期刊一区TOP期刊，IF=18.808）接收！

Abstract

The poor catalytic kinetics together with unsatisfied activity of non-precious metal electrocatalysts for oxygen evolution reaction hamper their applications in industrial water electrolysis. Inspired by oxygen evolution cluster of photosystem Ⅱ in nature, a Li⁺ doped NiFe layered double hydroxide modified with carboxylate is constructed by in situ growth on Ni foam (NFCL(70)-LDH@NF) via one-pot redox synthesis. Herein, lithium acetate is introduced to regulate electronic structure and improve the proton transfer kinetics, thus “Two birds with one stone”. The targeted product exhibits highly improved OER performance in 1 M KOH at room temperature (159 and 224 mV at 10 and 100 mA cm^-2), as well as dramatically decreased Tafel slope (47.9 mV dec^-1). Control experiments and theoretical calculations uncover that the presence of Li⁺ modulates the local electronic structure and stabilizes the OOH* intermediate. Specifically, the carboxylate ligands serve as relays to promote the proton transfer efficiency , which is similar to the concerted proton electrons transfer in photosystem II. Moreover, NFCL(70)-LDH@NF maintains the excellent performance over a month under the simulated industrial condition. The exploration of high performance triggered synergistically by Li⁺ doping and acetate-modifying sheds light on the design of organic-inorganic hybrid electrocatalysts for highly efficient OER.

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202202072