S element-doped synergistically well-mixed MOFs as highly efficient oxygen precipitation electrocatalyst. (21st September 2020)

• Record Type: Journal Article
• Authors: Guan, Hongxin; Wang, Na; Feng, Xuanxuan; Bian, Shaokang; Liu, Yaqing; Ma, Mengnan; Li, Wei; Chen, Yan
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 46(2020)
• Page Start: 24333
• Page End: 24340
• Publication Date: 2020-09-21
• Subjects: MOFs -- OER -- Sulfur doping -- Catalyst -- Electrochemistry; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.06.276
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The design of satisfied catalytic activity and stable catalysts for the oxygen evolution reaction (OER) is crucial in the production of hydrogen in electrolyzed water. Herein, S-doping NiCo-metal organic framework (NiCoS-MOF) were prepared successfully in situ on a nickel foamed (NF) substrate by used terephthalic acid (TPA) as an organic ligand via the original one-step solvothermal process, NiCoS-MOF reveals the electrocatalytic performance by the low overpotential of 71 mV at 10 mA cm −2 and the tafel slope of 74.4 mV dec −1 under alkaline condition (1 M KOH) served as OER electrodes directly. The i-t curve for 48 h at 1.50 and 2.14 V (vs.REH) showed excellent stability of NiCoS-MOF and the structure had no significant collapse after 1000 cycles. Superior OER activity and excellent stability could ascribed to the fluffy and orderly petal-like structure, which exhibited dispersal of the active sites and facilitated the evolution of oxygen during the catalysis process. The work enriched exploration of heteroatom-doped bimetallic MOFs in energy storage and conversion. Highlights: S-doped NiCo bimetallic MOF synthesized by One-step facile solvothermal method. The OER overpotential at 100 mA/cm −2 is 247 mv. The robust petal-like fluffy ordered structure enhanced the stability.