It is imperative but challenging to develop non-noble metal-based bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Our work reports a core-shell nanostructure that is constructed by the electrodeposition of ultrathin NiFe-LDH nanosheets (NiFe-LDHNS) on CuSe nanowires, which are obtained by selenizing Cu(OH) nanowires in situ grown on Cu foam. The obtained CuSe@NiFe-LDHNS electrocatalyst provides more exposed edges and catalytic active sites, thus exhibiting excellent OER and HER electrocatalytic performance in alkaline electrolytes. This catalyst needs only an overpotential of 197 mV for OER at 50 mA cm and 195 mV for HER at 10 mA cm. Besides, when employed as a bifunctional catalyst for overall water-splitting, it requires a cell voltage of 1.67 V to reach 10 mA cm in alkaline media. Furthermore, the corresponding water electrolyzer demonstrates robust durability for at least 40 h. The excellent performance of CuSe@NiFe-LDHNS might be ascribed to the synergistic effect from the ultrathin NiFe-LDHNS, the CuSe nanowires anchored on the Cu foam, and the formed core-shell nanostructure, which offers large surface area, ample active sites, and sufficient channels for gas and electrolyte diffusion. This work provides an efficient strategy for the fabrication of self-supported electrocatalysts for efficient overall water-splitting.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcis.2021.04.101 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Tunable optical and magnetic properties of Ni-doped CuSe nanowires using an anodic aluminum oxide template assisted hydraulic method.
Nanotechnology
August 2019
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan.
High uniformity of un-doped and Ni-doped CuSe nanowires have been fabricated by smelting the bulk and injecting the molten liquid into the anodic aluminum oxide (AAO) template. The Ni dopant concentration and morphology of CuSe nanowires can be well controlled via preparing the bulk materials and the channel size of the AAO template, respectively. The cathodoluminescence peaks of the un-doped, 0.
View Article and Find Full Text PDFGood Performance and Flexible PEDOT:PSS/CuSe Nanowire Thermoelectric Composite Films.
ACS Appl Mater Interfaces
April 2019
State Key Laboratory of High Performance Ceramics and Superfine Microstructure , Shanghai Institute of Ceramics, Chinese Academy of Science , Shanghai 200050 , China.
Herein, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) coated Cu Se (PC-Cu Se ) nanowires are prepared by a wet-chemical method, and PEDOT:PSS/Cu Se nanocomposite films on flexible nylon membrane are fabricated by vacuum assisted filtration and then cold-pressing. XRD analysis reveals that the Cu Se with different compositions can be obtained by adjusting the nominal Cu/Se molar ratios of their sources. For the composite film starting from a Cu/Se nominal molar ratio of 3, an optimized power factor of ∼270.
View Article and Find Full Text PDFAqueous preparation of surfactant-free copper selenide nanowires.
J Colloid Interface Sci
March 2015
Institute for Superconducting and Electronic Materials, Squires Way, Innovation Campus of University of Wollongong, Wollongong, NSW 2500, Australia.
Uniform surfactant-free copper selenide (Cu2-xSe) nanowires were prepared via an aqueous route. The effects of reaction parameters such as Cu/Se precursor ratio, Se/NaOH ratio, and reaction time on the formation of nanowires were comprehensively investigated. The results show that Cu2-xSe nanowires were formed through the assembling of CuSe nanoplates, accompanied by their self-redox reactions.
View Article and Find Full Text PDFLarge-scale growth of Cu2ZnSnSe4 and Cu2ZnSnSe4/Cu2ZnSnS4 core/shell nanowires.
Nanotechnology
July 2011
Department of Physics, Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, Shanghai, People's Republic of China.
We present a fast and simple protocol for large-scale preparation of quaternary Cu(2)ZnSnSe(4) (CZTSe), as well as CZTSe/Cu(2)ZnSnS(4) (CZTS) core/shell nanowires using CuSe nanowire bundles as self-sacrificial templates. CuSe nanowire bundles were synthesized by reacting Cu(2 - x)Se nanowire bundles with sodium citrate solution. CZTSe nanowires were prepared by reacting CuSe nanowire bundles with Zn(CH(3)COO)(2) and SnCl(2) in triethylene glycol.
View Article and Find Full Text PDFLarge-scale synthesis and phase transformation of CuSe, CuInSe2, and CuInSe2/CuInS2 core/shell nanowire bundles.
ACS Nano
April 2010
Center of Super-Diamond and Advanced Films (COSDAF), and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, People's Republic of China.
Facile chemical approaches for the controllable synthesis of CuSe, CuInSe2 nanowire, and CuInSe2/CuInS2 core/shell nanocable bundles were developed. Hexagonal CuSe nanowire bundles with lengths up to hundreds of micrometers, consisting of many aligned nanowires with a diameter of about 10-15 nm, were prepared by reacting cubic Cu(2-x)Se nanowire bundles with a sodium citrate solution at room temperature. The CuSe nanowire bundles were then used as self-sacrificial templates for making bundles of tetragonal chalcopyrite CuInSe2 nanowires by reacting with InCl3 via a solvothermal process.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!