Facile synthesis of cobalt modified 2D titanium carbide with enhanced hydrogen evolution performance in alkaline media |
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| Affiliation: | 1. Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electrical Engineering, East China Normal University, Shanghai, 200241, China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China;3. Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hengyang Normal University, Hengyang, 421008, PR China |
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| Abstract: | 2D transition metal carbides, nitrides and carbonitrides, namely the MXenes, attract more and more attentions due to their unique properties. Here, we report a simple one-step molten salt etching method to prepare Co modified MXene hybrid (Ti3C2Tx:Co) by the reaction of Ti3AlC2 with Lewis acid CoCl2 at 750 °C. Most of Co atoms aggregates in the interlayered space of Ti3C2Tx. Benefitting from the improved electron charge transfer efficiency and increased active sites, the sulfuric acid treated Ti3C2Tx:Co-12h hybrid exhibits excellent electrocatalytical activity for hydrogen evolution reaction in alkaline media, delivering a current density of 10 mA cm−2 at an overpotential of 103.6 mV, which is lower than most noble metal free MXene based electrocatalysts. The results illustrate that the proposed method is very facile and useful to incorporate mid-to-late transition metals into the MXene phase to prepare MXene based HER electrocatalysts. |
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| Keywords: | MXene Hydrogen evolution reaction Cobalt Electrocatalyst |
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