Pt quantum dots coupled with NiFe LDH nanosheets for efficient hydrogen evolution reaction at industrial current densities

• DOI: 10.20517/microstructures.2024.76
• Publication Date: 2025-02-27T09:33:58Z
• Authors: Boxue Wang; Xinru Zhao; Huachuan Sun; Mengling Zhang; Mingpeng Chen; Guoyang Qiu; Tong Zhou; Dequan Li; Yuewen Wu; Chen Liu; Hang Yang; Qinjie Lu; Jianhong Zhao; Yumin Zhang; Jin Zhang; Hao Cui; Feng Liu; Qingju Liu

Developing efficient and economical electrocatalysts for hydrogen generation at high current densities is crucial advancing energy sustainability. Herein, a self-supported evolution reaction (HER) electrocatalyst rationally designed prepared on nickel foam through simple two-step chemical etching method, which consists of Pt quantum dots (PtQDs) coupled with nickel-iron layered double hydroxide (NiFe LDH) nanosheets (named PtQDs@NiFe LDH). The characterization results indicate that the introduction PtQDs induces more oxygen vacancies, thereby optimizing electronic structure LDH. This modification enhances conductivity accelerates adsorption/desorption kinetics intermediates in LDH, ultimately resulting exceptional catalytic performance HER large densities. Specifically, LDH delivers 500 2000 mA·cm-2 remarkably low overpotentials 92 252 mV, respectively, markedly outperforming commercial Pt/C (η500 = 190 η2000 436 mV). Moreover, when employing NiFe precursor catalyst as anode cathode, an overall water electrolysis system, only 1.66 V 2.02 are required to achieve mA·cm-2, while maintaining robust stability 200 h. study introduces feasible approach developing industrial-scale