Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 28, Pages 18036-18042Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b03849
Keywords
hydrogen evolution reaction; FeSe2; electrocatalysis; water splitting; hybrid catalyst
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Herein, we describe the preparation and testing of Co-doped FeSe2 hybridized with graphene (Fe1-xCoxSe2/RGO), a high-active yet stable electrocatalyst for hydrogen evolution reactions (HERs) in acidic solutions. First, we systematically analyze the composition and morphology of Fe1-xCoxSe2/RGO and attribute its excellent electrochemical performance to its unique architecture a base of highly conductive graphene with fully exposed active edges that enhances conductivity and facilitates ion/electron transfer. Our experimental measurements indicate elevated HER activity with a moderate overpotential of similar to 166 mV at a hydrogen production current density of 10 mA cm(-2), a small Tafel slope of similar to 36 mV dec(-1), and long cycling lifespan more than 20 h. The promising results, in addition to the fact that Fe1-xCoxSe2/RGO is a high-performance, precious-metal-free electrocatalyst, pave the way for exciting opportunities in renewable hydrogen production applications.
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