Electrocatalytic water-splitting performance of MoS2 nanostructures can be improved by increasing edge density, activating basal planes, expanding interlayer spacing and stabilizing the 1T-phase. In this work, for the first time,...
Fabrication of hybrid trimetallic-organic framework-derived N, C co-doped Ni–Fe–Mn–P ultrathin nanosheet electrocatalyst demonstrating excellent performance with low overpotentials and cell voltage for HER, OER and overall water splitting.
Metallic (1T) molybdenum disulfide (MoS 2 ) is a much better electrocatalyst than the semiconducting (2H) MoS 2 because of its superior conductivity, presence of active basal planes, and bulky interlayers. However, the lack of thermodynamic stability has hindered its practical uses. The insertion of transition metals and nonmetals in the interlayers and the crystal is known to improve both the thermodynamic stability and the catalytic efficacy of 1T-MoS 2 . In this study, for the first time we have developed an electrocatalyst for water splitting based on metallic copper molybdenum sulfide (1T-CMS). The present catalyst, P-doped and intercalated 1T-CMS ultrathin 2D nanosheets on carbon cloth (P-1T-CMS@CC), demonstrates excellent catalytic efficacy for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). It required an overpotential of 95 mV for HER and of 284 mV for OER at a current density of 10 mA cm −2 . The P-1T-CMS@CC(+ −) device also shows excellent performance, requiring a cell voltage of only 1.51 V at a current density of 10 mA cm −2 .
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