Chemically deposited Co 3 S 4 thin film: morphology dependant electrocatalytic oxygen evolution reaction
Applied Physics A(2020)
摘要
In the field of energy conversion and storage, the cost-effective and highly active oxygen evolution reaction (OER) catalysts are in much demand. Herein, morphology dependant OER activity of Co 3 S 4 thin film electrodes fabricated using simple and cost effective successive ionic layer adsorption and reaction (SILAR) method is demonstrated for the first time. The morphology of Co 3 S 4 has been influenced by varying number of deposition cycles. The effect of change in morphology on the electrocatalytic properties of Co 3 S 4 thin film electrode is studied. The OER performance of Co 3 S 4 thin film is related to the morphology. The OER activity with an overpotential of 275 mV @10 mA cm −2 and Tafel slope of 53 mV dec −1 in 1 M KOH electrolyte is due to increased electrochemical active surface area, super-hydrophilic nature, and low electron transfer resistance of Co 3 S 4 thin film electrode.
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关键词
Cobalt sulfide, Electrocatalyst, Oxygen evolution reaction (OER), Successive ionic layer adsorption and reaction (SILAR) method, Thin film
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