Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 608, Issue -, Pages 3040-3048Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.11.025
Keywords
Hierarchical hybrid nanostructure; Tandem configuration; Synergic catalysis; Electrocatalyst; Oxygen evolution
Categories
Funding
- National key R&D program of China [2020YFB2008601]
- Shanghai Road and Belt International Cooperation Project [19520744200]
- Key Basic Research Pro-gram of Science and Technology Commission of Shanghai Munici-pality [20JC1415300]
- National Natural Science Foundation of China [61974155]
- Key Research Program of Frontier Sciences of Chinese Academy of Sciences [QYZDJSSW-JSC001]
- State Key Labora-tory of Transducer Technology of China [SKT1806]
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A sequential synthetic strategy was used to prepare a hierarchical nanostructure with optimized electron transfer capability, catalytic activity and durability, resulting in a superior OER catalytic ability and good durability for the obtained nanocatalyst 1T-MoS2/Co3O4/CN.
High efficient and durable catalysts are always needed to lower the kinetic barriers as well as prolong the service life associated with oxygen evolution reaction (OER). Herein, a sequential synthetic strategy is considered to prepare a hierarchical nanostructure, in which each component can be configured to achieve their full potential so that endows the resulting nanocatalyst a good overall performance. In order to realize this, well-organized cobalt oxide (Co3O4) nanopillars are firstly grown onto ultrathin 1Tmolybdenum sulfide (1T-MoS2) to obtain high surface area electrocatalyst, providing electron transfer pathways and structural stability. After that, zeolitic imidazolate framework-67 (ZIF-67) derived carbonization film is further in situ deposited on the surface of nanopillars to generate plentiful active sites, thereby accelerating OER kinetics. Based on the combination of different components, the electron transfer capability, catalytic activity and durability are optimized and fully implemented. The obtained nanocatalyst (defined as 1T-MoS2/Co3O4/CN) exhibits the superior OER catalytic ability with the overpotential of 202 mV and Tafel slope of 57 mV.dec(-1) at 10 mA.cm(-2) in 0.1 M KOH, and good durability with a minor chronoamperometric decay of 9.15 % after 60,000 s of polarization. (C) 2021 Elsevier Inc. All rights reserved.
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