Porous nickel disulfide/reduced graphene oxide nanohybrids with improved electrocatalytic performance for hydrogen evolution

Single porous nickel disulfide (NiS2) nanoballs and nanohybrids of NiS2 with reduced graphene oxide (NiS2/rGO) were successfully prepared by a simple hydrothermal process in the absence or presence of graphene oxide. NiS2/rGO nanocomposites exhibit remarkable electrocatalytic performance for hydroge...

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Bibliographic Details
Published inCatalysis communications Vol. 85; pp. 26 - 29
Main Authors Chen, Ruidian, Song, Yuxin, Wang, Zikai, Gao, Yuhang, Sheng, Ye, Shu, Zhanyi, Zhang, Jian, Li, Xing'ao
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.10.2016
Subjects
Electrocatalytic
Hydrogen evolution
Nanocomposites
NiS2
Porous
Electrocatalytic
Nanocomposites
Hydrogen evolution
NiS2
Porous
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Summary:Single porous nickel disulfide (NiS2) nanoballs and nanohybrids of NiS2 with reduced graphene oxide (NiS2/rGO) were successfully prepared by a simple hydrothermal process in the absence or presence of graphene oxide. NiS2/rGO nanocomposites exhibit remarkable electrocatalytic performance for hydrogen evolution from water splitting due to the plentiful active sites in the porous NiS2, the improved conductivity and the positive synergetic effect between NiS2 and rGO. The nanocomposites displayed superior activity for the hydrogen evolution reaction (10mAcm−2 vs. −200mV, Tafel slope of 52mVdec−1) and an excellent electrocatalytic stability. [Display omitted] •Porous NiS2 and NiS2/rGO were prepared by a one-pot hydrothermal process.•The rich active sites of NiS2 from porous structures can promote the HER activity.•Coupled with graphene, the HER activity of composites is further promoted.•Negligible decay in activity is found after 3000cycles for NiS2/rGO sample.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2016.07.010