Guided Heterostructure Growth of CoFe LDH on Ti 3 C 2 T x MXene for Durably High Oxygen Evolution Activity.

Autor: Sheng J; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland., Kang J; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland., Jiang P; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland.; Research Institute of Wood Industry, Chinese Academy of Forestry, Xiangshan Road, Beijing, 100091, China., Meinander K; Department of Bioproducts and Biosystems, Aalto University, Espoo, FIN-02150, Finland., Hong X; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland., Jiang H; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland., Nonappa; Faculty of Engineering and Natural Sciences, Tampere University, Tampere, FI-33101, Finland., Ikkala O; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland., Komsa HP; Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, FIN-90014, Finland., Peng B; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland.; Department of Materials Science, Advanced Coating Research Center of Ministry of Education of China, Fudan University, Shanghai, 200433, China., Lv ZP; Department of Applied Physics, Aalto University, ESPOO, FIN-02150, Finland.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Sep 10, pp. e2404927. Date of Electronic Publication: 2024 Sep 10.
DOI: 10.1002/smll.202404927
Abstrakt: Heterostructures of layered double hydroxides (LDHs) and MXenes have shown great promise for oxygen evolution reaction (OER) catalysts, owing to their complementary physical properties. Coupling LDHs with MXenes can potentially enhance their conductivity, stability, and OER activity. In this work, a scalable and straightforward in situ guided growth of CoFeLDH on Ti 3 C 2 T x is introduced, where the surface chemistry of Ti 3 C 2 T x dominates the resulting heterostructures, allowing tunable crystal domain sizes of LDHs. Combined simulation results of Monte Carlo and density functional theory (DFT) validate this guided growth mechanism. Through this way, the optimized heterostructures allow the highest OER activity of the overpotential = 301 mV and Tafel slope = 43 mV dec -1 at 10 mA cm -2 , and a considerably durable stability of 0.1% decay over 200 h use, remarkably outperforming all reported LDHs-MXenes materials. DFT calculations indicate that the charge transfer in heterostructures can decrease the rate-limiting energy barrier for OER, facilitating OER activity. The combined experimental and theoretical efforts identify the participation role of MXene in heterostructures for OER reactions, providing insights into designing advanced heterostructures for robust OER electrocatalysis.
(© 2024 The Author(s). Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE