Surface engineering of MOF-derived FeCo/NC core-shell nanostructures to enhance alkaline water-splitting. (26th January 2022)

• Record Type: Journal Article
• Authors: Shah, Syed Shoaib Ahmad; Jery, Atef El; Najam, Tayyaba; Nazir, Muhammad Altaf; Wei, Liu; Hussain, Ejaz; Hussain, Shahid; Rebah, Faouzi Ben; Javed, Muhammad Sufyan
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 8(2022)
• Page Start: 5036
• Page End: 5043
• Publication Date: 2022-01-26
• Subjects: Nanostructure engineering -- Metal-organic framework -- Heteroatom doping -- Alkaline water splitting; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.11.167
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: MOF-derived catalysts show excellent performance in many electrochemical reactions, including alkaline water splitting. This manuscript describes synthesis of composite mixture by engineering the N-doped carbon (NC) layer on the surface of FeCo-doped MOF at nanoscale level via sonication, and pyrolysis process produced metal-coordinated N-doped carbon hybrids (FC-NC/NC). The addition of NC in FeCo bimetal contributes to larger-size and more robust carbon shells compared to bimetal-decorated without NC. The representative core shell assembly with greater electrolyte-accessible surface and enrich mass diffusion paths ultimately benefit the FC-NC/NC catalyst to demonstrate higher performance, which affords the minimum overpotentials of 295/193 mV towards oxygen/hydrogen evolution reactions, and stable durability performance under alkaline solution. Furthermore, the excellent water electrolyzer activity was achieved by FC-NC/NC with a cell voltage of 1.64 V at 10 mA cm −2 . Hence, this strategy is a fruitful trial to optimized the active sites of FeCo-based electrocatalyst towards alkaline water electrolyzer. Graphical abstract: Image 1 Highlights: Nanostructure engineering by external composite approach. Interfacial connection between conducting carbon shell and metallic core towards enhanced electrocatalysis. Significant role of core-shell structure during catalytic pathway. High electrocatalytic bifunctional performance and stability.