Chlorophyll derivatives/MXene hybrids for photocatalytic hydrogen evolution: Dependence of performance on the central coordinating metals |
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| Affiliation: | 1. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) & State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, PR China;2. Institute for Materials Discovery, University College London, London, WC1E 7JE, United Kingdom;3. Department of Materials Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan;4. Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan;5. Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga, 526-0829, Japan |
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| Abstract: | Development of efficient photocatalytic hydrogen evolution reaction (HER) with illumination of visible light is challenging. In this work, five chlorophyll derivatives (M-Chls; M = H2/Cu/Ni/Co/Zn) with different central ions in its cyclic tetrapyrrole ring including free base, copper, nickel, cobalt, and zinc were synthesized and employed as the effective visible-light harvester for efficient HER. In addition, two-dimensional (2D) noble metal-free co-catalyst Ti3C2Tx MXene was used as an excellent electron capturer due to its outstanding conductivity property. These M-Chls are modified on the surface of Ti3C2Tx MXene with 2D accordion-like morphology by means of a simple deposition process to form noble metal-free Chl/Ti3C2Tx-based photocatalysts for HER. It is found that the best HER performance as high as 49 μmol/h/gcat was achieved with the Co-Chl@Ti3C2Tx hybrid, which was much higher than those of other M-Chl@Ti3C2Tx composites. This research provides a specific way to synthesize low-cost and environmentally friendly natural Chls for developing highly efficient photocatalytic HER through molecular engineering. |
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| Keywords: | Central metals ion Chlorophyll derivatives Aggregates materials Hydrogen evolution reaction |
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