Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 248, Issue -, Pages 202-210Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.02.014
Keywords
Metal-organic framework; Bifunctional; Catalysts; Heterostructure and synergistic
Funding
- National Research Foundation of Korea (NRF) - Korea government (MISP) [2014R1A4A1008140]
- program for fostering next-generation researchers in the engineering of National Research Foundation of Korea (NRF) - Ministry of Education ICT [2017H1D8A2030449]
- National Research Foundation of Korea [2014R1A4A1008140] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Fabrication of highly efficient, sustainable and low-cost nonprecious metal oxide for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is exceedingly challenging and warranted for overall water splitting. Herein, we synthesized cobalt nanoleaves metal-organic framed work (MOF) on nickel foam substrate with uniform growth. After calcination of Co-MOF, molybdenum disulfide nanosheets is grown by a facial hydrothermal method. The as-prepared heterostructure (Co3O4/MoS2) can act as bifunctional electrocatalysts for overall water splitting. Under optimized condition, synthesized Co3O4/MoS2 heterostructure catalyst exhibited excellent catalytic activity for both OER and HER in 1 M KOH solution with a current density of 20 mA cm(-2) at overpotential of 230 mV for OER and 205 mV for HER (@ j = 10 mA cm(-2)) and Tafel slopes of 45 and 98 mV dec(-1), respectively. The superior catalytic activity for both OER and HER arises from the unique heterostructure of Co3O4/MoS2 and the synergistic effects of Co3O4 and MoS2.
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