2019
DOI: 10.1002/smll.201804545
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Nickel@Nitrogen‐Doped Carbon@MoS2 Nanosheets: An Efficient Electrocatalyst for Hydrogen Evolution Reaction

Abstract: Developing cheap, abundant, and easily available electrocatalysts to drive the hydrogen evolution reaction (HER) at small overpotentials is an urgent demand of hydrogen production from water splitting. Molybdenum disulfide (MoS2) based composites have emerged as competitive electrocatalysts for HER in recent years. Herein, nickel@nitrogen‐doped carbon@MoS2 nanosheets (Ni@NC@MoS2) hybrid sub‐microspheres are presented as HER catalyst. MoS2 nanosheets with expanded interlayer spacings are vertically grown on nic… Show more

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Cited by 137 publications
(53 citation statements)
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References 72 publications
(168 reference statements)
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“…The diffraction patterns of CoCo‐PBA matched with the cubic Co 3 [Co(CN) 6 ] 2 (JCPDS 77‐1161) (Figure a). Overall, the diffraction patterns (Figure b) of as‐prepared MoS 2 are similar to those observed in previous work . The poor crystallinity might be caused by the hydro‐carbonization of glucose as reducing agent during the preparation process, which greatly inhibited the growth of MoS 2 crystal, especially in the (002) planes .…”
Section: Resultssupporting
confidence: 81%
“…The diffraction patterns of CoCo‐PBA matched with the cubic Co 3 [Co(CN) 6 ] 2 (JCPDS 77‐1161) (Figure a). Overall, the diffraction patterns (Figure b) of as‐prepared MoS 2 are similar to those observed in previous work . The poor crystallinity might be caused by the hydro‐carbonization of glucose as reducing agent during the preparation process, which greatly inhibited the growth of MoS 2 crystal, especially in the (002) planes .…”
Section: Resultssupporting
confidence: 81%
“…Two characteristic peaks at around 33°and 57°for bare MoS 2 can be indexed to the (100) and (110) crystal planes of hexagonal 2H-MoS 2 (JCPDS 37-1492), respectively (Figure 2a). [15][16][17] The peak at ∼ 8.9°is assigned to the (002) planes compared to the standard 14.4°for 2H-MoS 2 . The shift of characteristic peak indexed to (002) planes results in the increase of MoS 2 interlayer spacing from the standard 0.62 nm to 0.99 nm, which accelerates the transport and diffusion of H + during the catalytic reaction.…”
Section: Resultsmentioning
confidence: 96%
“…[20,22,24,27,38,32] It may be due to the improved in-plane electrical conductivity and carrier concentration of MoS 2 after nitrogen doping as observed in earlier cases for the nitrogen-manganese co-doped MoS 2 and nick-el@N-doped carbon@MoS 2 systems. [38,40] Therefore, the HER activity enhancement can be related to the N dopants in the MoS 2 crystal structure. Moreover, the Tafel plots were derived to understand the quantitative kinetics and mechanistic pathway of the HER process in acidic medium as shown in Figure 6b.…”
Section: Resultsmentioning
confidence: 99%