Layered double hydroxides (LDHs), whose formation is strongly related to OH− concentration, have attracted significant interest in various fields. However, the effect of the real-time change of OH− concentration on LDHs’ formation has not been fully explored due to the unsuitability of the existing synthesis methods for in situ characterization. Here, the deliberately designed combination of NH3 gas diffusion and in situ pH measurement provides a solution to the above problem. The obtained results revealed the formation mechanism and also guided us to synthesize a library of LDHs with the desired attributes in water at room temperature without using any additives. After evaluating their oxygen evolution reaction performance, we found that FeNi-LDH with a Fe/Ni ratio of 25/75 exhibits one of the best performances so far reported.

Revealing the Formation Mechanism and Optimizing the Synthesis Conditions of Layered Double Hydroxides for the Oxygen Evolution Reaction / Chen, Z.; Wang, X.; Han, Z.; Zhang, S.; Pollastri, S.; Fan, Q.; Qu, Z.; Sarker, D.; Scheu, C.; Huang, M.; Colfen, H.. - In: ANGEWANDTE CHEMIE. INTERNATIONAL EDITION. - ISSN 1433-7851. - 62:10(2023), pp. N/A-N/A. [10.1002/anie.202215728]

Revealing the Formation Mechanism and Optimizing the Synthesis Conditions of Layered Double Hydroxides for the Oxygen Evolution Reaction

Pollastri S.;
2023

Abstract

Layered double hydroxides (LDHs), whose formation is strongly related to OH− concentration, have attracted significant interest in various fields. However, the effect of the real-time change of OH− concentration on LDHs’ formation has not been fully explored due to the unsuitability of the existing synthesis methods for in situ characterization. Here, the deliberately designed combination of NH3 gas diffusion and in situ pH measurement provides a solution to the above problem. The obtained results revealed the formation mechanism and also guided us to synthesize a library of LDHs with the desired attributes in water at room temperature without using any additives. After evaluating their oxygen evolution reaction performance, we found that FeNi-LDH with a Fe/Ni ratio of 25/75 exhibits one of the best performances so far reported.
2023
62
10
N/A
N/A
Revealing the Formation Mechanism and Optimizing the Synthesis Conditions of Layered Double Hydroxides for the Oxygen Evolution Reaction / Chen, Z.; Wang, X.; Han, Z.; Zhang, S.; Pollastri, S.; Fan, Q.; Qu, Z.; Sarker, D.; Scheu, C.; Huang, M.; Colfen, H.. - In: ANGEWANDTE CHEMIE. INTERNATIONAL EDITION. - ISSN 1433-7851. - 62:10(2023), pp. N/A-N/A. [10.1002/anie.202215728]
Chen, Z.; Wang, X.; Han, Z.; Zhang, S.; Pollastri, S.; Fan, Q.; Qu, Z.; Sarker, D.; Scheu, C.; Huang, M.; Colfen, H.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1307541
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