3D‐Stretched Film Ni3S2 Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting. Issue 28 (13th June 2021)

• Record Type: Journal Article
• Authors: Chen, Yushan; Yu, Zebin; Jiang, Ronghua; Huang, Jun; Hou, Yanping; Chen, Jianhua; Zhang, Yongqing; Zhu, Hongxiang; Wang, Bing; Wang, Mi
• Is Part Of: Small. Volume 17:Issue 28(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-13
• Subjects: anthraquinone derivatives -- functional groups -- hydrogen evolution reaction -- Ni 3S 2 nanosheets -- overall water splitting -- oxygen evolution reaction -- polymers; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202101003
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: For the first time, a new polymer electrode AQS/S is prepared by compositing Ni3 S2 nanosheets and macromolecular anthraquinone derivative (AQD) supported on nickel foam with flying colors. The AQS/S exhibits high crystalline structure and abundant S defects. Density of state calculation shows that AQD has stable internal bonding and easy external bonding with metals, conducive to the dispersion of metal reaction sites, ensuring excellent activity and high stability. Under 1.0 m KOH solution, ultralow overpotentials of 62 and 133 mV at 10 mA cm −2 on AQS/S for hydrogen evolution reaction and on activated AQS/S (A‐AQS/S) for oxygen evolution reaction, respectively, are achieved. 100 h chronopotentiometry and the cyclic voltammetry tests show that catalysts have high durability. The AQS/S‖A‐AQS/S two‐electrode system is also found to have good electrocatalytic activity for 1.43 V to get 10 mA cm −2 in overall water splitting, better than the state‐of‐the‐art 20% Pt/C‖RuO2 combination. Abstract : The catalytic mechanism of AQD/S catalyst for overall water splitting is clarified here. AQD/S accelerates electron transport efficiency. The electrons are transferred to the active sites of hydrogen evolution reaction (M–S/N) and oxygen evolution reaction (M–OOH), which catalyzes water splitting, resulting in hydrogen evolution and oxygen evolution.