Monodispersed Pt Sites Supported on NiFe‐LDH from Synchronous Anchoring and Reduction for High Efficiency Overall Water Splitting

• DOI: 10.1002/smll.202207044
• Publication Date: 2023-01-16T04:47:48Z
• Authors: Jia‐Min Huo; Ze‐Lin Ma; Ying Wang; Yi‐Jia Cao; Yu‐Cheng Jiang; Shu‐Ni Li; Yu Chen; Man‐Cheng Hu; Quan‐Guo Zhai
• Keywords: Noble metal; Oxygen evolution

Precise design of low-cost, efficient and definite electrocatalysts is the key to sustainable renewable energy. Herein, this work develops a targeted-anchored subsequent spontaneous-redox strategy synthesize nickel-iron layered double hydroxide (LDH) nanosheets anchored with monodispersed platinum (Pt) sites (Pt@LDH). Intermediate metal-organic frameworks (MOF)/LDH heterostructure not only provides numerous confine points guarantee stability Pt sites, but also excites spontaneous reduction for PtII . Electronic structure, charge transfer ability reaction kinetics Pt@LDH can be effectively facilitated by moieties. As result, optimized that 5% ultra-low content exhibits significant increment in electrochemical water splitting performance alkaline media, which afford low overpotentials 58 mV at 10 mA cm-2 hydrogen evolution (HER) 239 oxygen (OER), respectively. In real device, drive an overall water-splitting cell voltage 1.49 V , superior most reported similar LDH-based catalysts. Moreover, versatility method extended other MOF precursors noble metals ultrathin LDH supported metal promoting research interest material design.