Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 258, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117970
Keywords
Methanol oxidation reaction; Hydrogen evolution reaction; Oxygen evolution reaction; CoNi-zeolitic imidazole framework; MoS2 nanosheets
Funding
- National Natural Science Foundation of China [21571158, 21601161]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [19HASTIT050]
- Innovative Technology Team of Henan Province [CXTD2014042]
- Key Research Project of University of Henan Province [19zx004]
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We have explored a nanocomposite composed of a bimetallic CoNi-zeolitic imidazole framework embedded by MoS2 nanosheets (MoS2@CoNi-ZIF), as a bifunctional electrocatalyst for non-Pt methanol oxidation reaction (MOR) and overall water splitting in an alkaline solution. The series of MoS2@CoNi-ZIF nanocomposites exhibit different catalytic activities. Significantly, the MoS2@CoNi-ZIF nanosheet with a ratio of MoS2:CoNi-ZIF = 3:1 (MoS2@CoNi-ZIF(3-1)) shows the excellent electrocatalytic activity for MOR, affording an oxidation potential at 1.6 V, also with high catalytic current density and durability. Moreover, the MoS2@CoNi-ZIF(3-1) nano composite shows a superior electrocatalytic performance toward HER and OER. When the MoS2@CoNi-ZIF(3-1) was applied as the bifunctional catalyst for both the anode and cathode, the voltage applied to a two-electrode cell is 1.55V to achieve a current density of 10 mA cm(-2) for overall water splitting. This work provides a promising electrocatalyst for developing high-performance non-Pt-based clean energy and fuel cells in alkaline solution.
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