Efficient photocatalytic hydrogen evolution reaction (HER) in the visible‐to‐near infrared region at a low cost remains a challenging issue. This work demonstrates the fabrication of organic‐inorganic composites by deposition of supramolecular aggregates of a chlorophyll derivative, namely, zinc methyl 3‐devinyl‐3‐hydroxymethyl‐pyropheophorbide a (Chl) on the surface of Ti₃C₂T_x MXene with 2D accordion‐like morphology. This composite material is employed as noble metal‐free catalyst in photocatalytic HER under the white light illumination, where Chl serves as a small molecule organic semiconductor component instead of ordinary inorganic and polymer organic semiconductors such as TiO₂ and g‐C₃N₄, and Ti₃C₂T_x serves as a co‐catalyst. Different composition ratios of Chl/Ti₃C₂T_x are compared for their light‐harvesting ability, morphology, charge transfer efficiency, and photocatalytic performance. The best HER performance is found to be as high as 52 ± 5 µmol h⁻¹ g_cat⁻¹ after optimization. Such a large HER activity is attributed to the efficient light harvesting followed by exciton transfer in Chl aggregates and the resultant charge separation at the interface of Chl/Ti₃C₂T_x.

中文翻译：

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Ti3C2Tx MXene纳米片上类似于叶绿素的分子聚集体，可有效释放无贵金属的光催化氢

在可见光到近红外区域内以低成本进行有效的光催化氢释放反应（HER）仍然是一个具有挑战性的问题。这项工作展示了通过在叶绿素衍生物的超分子聚集体上以2D沉积在Ti ₃ C ₂ T _x MXene表面上的叶绿素衍生物的超分子聚集体，即甲基3-devinyl-3-羟基甲基-焦脱镁叶绿酸a（Chl），来制造有机-无机复合材料。手风琴状形态。这种复合材料在白光照射下用作光催化HER中的无贵金属催化剂，其中Chl用作小分子有机半导体组分，而不是普通的无机和高分子有机半导体（例如TiO ₂和g-C _3）N ₄和Ti ₃ C ₂ T _x用作助催化剂。叶绿素/ Ti的不同组成比₃ c ^ ₂ Ť _X为他们的捕光能力，形态学，电荷转移效率，和光催化性能进行比较。经过优化后，发现最佳的HER性能高达52±5 µmol h ^-1 g _cat ^-1。如此大的HER活性归因于有效的光收集，随后是Chl聚集体中的激子转移，以及Chl / Ti ₃ C ₂ T _x界面处的电荷分离。