Surface‐Adsorbed Carboxylate Ligands on Layered Double Hydroxides/Metal–Organic Frameworks Promote the Electrocatalytic Oxygen Evolution Reaction
| العنوان: | Surface‐Adsorbed Carboxylate Ligands on Layered Double Hydroxides/Metal–Organic Frameworks Promote the Electrocatalytic Oxygen Evolution Reaction |
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| المؤلفون: | Jin-Qi Wu, Cheng-Fei Li, Jia-Wei Zhao, Qian Ren, Yu Wang, Ling-Jie Xie, Gao-Ren Li |
| المصدر: | Angewandte Chemie. 133:18277-18285 |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010405 organic chemistry, Oxygen evolution, Layered double hydroxides, General Chemistry, General Medicine, engineering.material, 010402 general chemistry, Electrocatalyst, Photochemistry, 01 natural sciences, Catalysis, Dissociation (chemistry), 0104 chemical sciences, chemistry.chemical_compound, X-ray photoelectron spectroscopy, chemistry, engineering, Metal-organic framework, Carboxylate, Lewis acids and bases |
| الوصف: | Metal-organic frameworks (MOFs) with carboxylate ligands as co-catalysts are very efficient for the oxygen evolution reaction (OER). However, the role of local adsorbed carboxylate ligands around the in-situ-transformed metal (oxy)hydroxides during OER is often overlooked. We reveal the extraordinary role and mechanism of surface-adsorbed carboxylate ligands on bi/trimetallic layered double hydroxides (LDHs)/MOFs for OER electrocatalytic activity enhancement. The results of X-ray photoelectron spectroscopy (XPS), synchrotron X-ray absorption spectroscopy, and density functional theory (DFT) calculations show that the carboxylic groups around metal (oxy)hydroxides can efficiently induce interfacial electron redistribution, facilitate an abundant high-valence state of nickel species with a partially distorted octahedral structure, and optimize the d-band center together with the beneficial Gibbs free energy of the intermediate. Furthermore, the results of in situ Raman and FTIR spectra reveal that the surface-adsorbed carboxylate ligands as Lewis base can promote sluggish OER kinetics by accelerating proton transfer and facilitating adsorption, activation, and dissociation of hydroxyl ions (OH- ). |
| تدمد: | 1521-3757 0044-8249 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6c9694a93fd907cc070932b867b0a6c https://doi.org/10.1002/ange.202104148 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....b6c9694a93fd907cc070932b867b0a6c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213757 00448249 |
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