Journal
ACS APPLIED NANO MATERIALS
Volume 2, Issue 1, Pages 325-333Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b01932
Keywords
oxygen evolution reaction; cactuslike support; water splitting; NiFe layered double hydroxide; efficient catalyst
Funding
- Ministry of Education [MOE2016-T2-2-138]
- NUS CA2DM
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The oxygen evolution reaction (OER) is a pivotal half-reaction for next-generation energy storage and conversion technologies, for example, in metal-air batteries and water splitting. Herein, we report the preparation of a freestanding cactuslike structural (Ni,Co)Se-2 support shelled with NiFe layered double hydroxides (LDHs), as a highly active and durable OER catalyst with low cost. This cactuslike selenide support provides an interconnected conductive and robust framework, which can ensure efficient electron transfer and prevent the aggregation of LDHs. The synergistic combination and coupling effects of active NiFe-LDH and conductive (Ni,Co)Se, raise the intrinsic catalytic activity. As expected, when serving as an OER catalyst in 1 M KOH aqueous solution, the (Ni,Co)Se-2/NiFe-LDH presents a high activity with overpotential of approximate to 205 mV at a current density of 10 mV cm(-2), a small Tafel slope of approximate to 61 mV dec(-1), as well as a high durability observed at 30 h of a chronoamperometric test. The present study shows the promise of the cactuslike structural (Ni,Co)Se-2/NiFe-LDH as an effective OER catalyst, which provides a new thought for the fabrication of non-noble-metal catalysts and desired nanostructures.
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