We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Self-Supported NiS Nanoparticle-Coupled Ni<sub>2</sub>P Nanoflake Array Architecture: An Advanced Catalyst for Electrochemical Hydrogen Evolution.
- Authors
Sun, Jianmin; Chen, Yajie; Ren, Zhiyu; Fu, Huiying; Xiao, Yuting; Wang, Jinge; Tian, Guohui
- Abstract
The fabrication of heterostructured semiconductors is an effective strategy for improving electrochemical hydrogen evolution performance. In this work, we designed and prepared a novel self-supported NiS nanoparticle-coupled Ni2P nanoflake array architecture. Vertically oriented Ni(OH)2 nanoflake arrays were first grown on carbon fiber paper by using a hydrothermal seed growth process. Then, the following sulfuration and phosphatization processes resulted in the formation of NiS nanoparticle-decorated Ni2P nanoflake arrays supported on carbon fiber paper (CP/Ni2P/NiS). The obtained CP/Ni2P/NiS heterostructured nanoflake arrays, as novel 3D hydrogen evolution cathodes, possess superhydrophilic surfaces, abundant coupling interfaces, and sufficient surface active sites; they can also facilitate proton accessibility, rapid charge transport, and timely gas detachment. As expected, these positive synergistic effects endowed the optimal CP/Ni2P/NiS heterostructured nanoflake array electrode with a low onset overpotential of 58 mV and a small Tafel slope of 68 mV dec−1. A low overpotential of −103 mV is needed to afford a catalytic current density of 10 mA cm−2. The current density of the heterostructure hybrid electrode can keep its catalytic current density for at least 5000 cycles reaction without obvious loss of catalytic activity, indicating its good durability.
- Subjects
HYDROGEN evolution reactions; HYDROPHILIC interactions; CURRENT density (Electromagnetism); NICKEL sulfide; CARBON fibers
- Publication
ChemElectroChem, 2017, Vol 4, Issue 6, p1341
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201700094