Zheng, T; Li, Y; Sun, Y; Dall'Agnese, Y; Dall'Agnese, C; Sasaki, S-I; Tamiaki, H; Zheng, T; Li, Y; Sun, Y; Dall'Agnese, Y; Dall'Agnese, C; Sasaki, S-I; Tamiaki, H; Wang, X-F; - view fewer (2022) Effect of the Fabrication Method of Chlorophyll-Ti3C2Tx-Based Photocatalysts on Noble Metal-Free Hydrogen Evolution. Energy Technology , 10 (2) , Article 2100713. 10.1002/ente.202100713.

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Abstract

Composites composed of a chlorophyll-a derivative and Ti3C2Tx MXene recently showed promising results as photocatalysts for the hydrogen evolution reaction. Herein, this type of composites is prepared by using a layered Ti3C2Tx material via an HCl@LiF etching technique, instead of the previously adopted HF etching technique. The performance of H2 evolution, therefore, showed a fourfold increase in this photocatalytic system, compared with the reported data in our previous works. The underlying reason for such a large improvement of the chlorophyll-MXene photocatalyst performance would be attributed to a more suitable surface chemistry, higher conductivity, fewer defects, higher surface area, and larger interlayer space of Ti3C2Tx introduced by the Li+ ions from LiF in the etching process. Herein, it is revealed that the preparation method of MXenes used as the cocatalysts is key to improve the H2 evolution efficiency in photocatalytic water splitting.

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