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• W3210274749 endingPage "328" @default.
• W3210274749 startingPage "320" @default.
• W3210274749 abstract "• The MoS 2 /NiS 2 and WS 2 /NiS 2 heterostructures are synthesized by a facile solid-state synthesis strategy. • The obtained heterostructures spontaneously construct a built-in electric field at the heterointerface. • The MoS 2 /NiS 2 and WS 2 /NiS 2 heterostructures exhibit superior OER performance. Developing highly efficient, durable, and non-noble electrocatalysts for the sluggish anodic oxygen evolution reaction (OER) is the pivotal for meeting the practical demand in water splitting. However, the current transition-metal electrocatalysts still suffer from low activity and durability on account of poor interfacial reaction kinetics. In this work, a facile solid-state synthesis strategy is developed to construct transition-metal sulfides heterostructures (denoted as MS 2 /NiS 2 , M = Mo or W) for boosting OER electrocatalysis. As a result, MoS 2 /NiS 2 and WS 2 /NiS 2 show lower overpotentials of 300 mV and 320 mV to achieve the current density of 10 mA·cm −2 , and smaller Tafel slopes of 60 mV·dec −1 and 83 mV·dec −1 in 1 mol·L −1 KOH, respectively, in comparison with the single MoS 2 , WS 2 , NiS 2 , as well as even the benchmark RuO 2 . The experiments reveal that the designed heterostructures have strong electronic interactions and spontaneously develop a built-in electric field at the heterointerface with uneven charge distribution based on the difference of band structures, which promote interfacial charge transfer, improve absorptivity of OH − , and modulate the energy level more comparable to the OER. Thus, the designed transition-metal sulfides heterostructures exhibit a remarkably high electrocatalytic activity for OER. This study provides a simple strategy to manipulate the heterostructure interface via an energy level engineering method for OER and can be extended to fabricate other heterostructures for various energy-related applications." @default.
• W3210274749 created "2021-11-08" @default.
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• W3210274749 date "2022-01-01" @default.
• W3210274749 modified "2023-10-16" @default.
• W3210274749 title "Interfacial engineering of transition-metal sulfides heterostructures with built-in electric-field effects for enhanced oxygen evolution reaction" @default.
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• W3210274749 doi "https://doi.org/10.1016/j.cjche.2021.09.026" @default.
• W3210274749 hasPublicationYear "2022" @default.
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