期刊
SMALL
卷 18, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202201896
关键词
atomic layer deposition; electrocatalysis; hydrogen evolution reaction; metal sulfides; oxides; tandem interfaces
类别
资金
- National Natural Science Foundation of China [21701190, 51902356]
A highly active and durable electrocatalyst for the hydrogen evolution reaction (HER) has been reported. The catalyst demonstrates excellent performance in alkaline and neutral mediums. A ternary composite material with a tandem interface strategy is used, which allows for superior HER performance through the modulation of heterointerface and intermediates electronic structure.
Reported herein is a highly active and durable hydrogen evolution reaction (HER) electrocatalyst, which is constructed following a tandem interface strategy and functional in alkaline and even neutral medium (pH approximate to 7). The ternary composite material, consisting of conductive nickel foam (NF) substrate, Ni3S2-MoS2 heterostructure, and TiO2 coating, is synthesized by the hydrothermal method and atomic layer deposition (ALD) technique. Representative results include: (1) versatile characterizations confirm the proposed composite structure and strong electronic interactions among comprised sulfide and oxide species; (2) the material outperforms commercial Pt/C by recording an overpotential of 115 mV and a Tafel slope of 67 mV dec(-1) under neutral conditions. A long-term stability in alkaline electrolytes up to 200 h and impressive overall water splitting behavior (1.56 V @ 10 mA cm(-2)) are documented; (3) implementation of ALD oxide tandem layer is crucial to realize the design concept with superior HER performance by modulating a variety of heterointerface and intermediates electronic structure.
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