Nobel metal Pt composites show high catalytic activity for hydrogen evolution reaction (HER) but limited in application by high Pt contents and therefore the cost. Herein, a series of Pt nanoparticle (NP)-deposited 2D Ti₃C₂T_x MXenes were prepared by an atomic layer deposition (ALD) method with relatively low Pt contents (0.98–3.10 wt %) and showed excellent HER catalytic activity and stability. The electrochemical results indicated that the prepared catalysts showed the optimal HER activity as the ALD deposition cycle reached 40, with an overpotential of 67.8 mV approaching that of the commercial Pt/C catalyst (64.2 mV). The excellent behavior was attributed to the homogeneous dispersion of the Pt NPs and the good conductivity of the 2D Ti₃C₂T_x MXene supports.

中文翻译：

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铂纳米颗粒沉积Ti ₃ C ₂ T _x MXene的氢分解反应

诺贝尔金属Pt复合材料对氢气析出反应（HER）表现出高催化活性，但由于高Pt含量和成本而在应用中受到限制。在此，通过原子层沉积（ALD）方法制备了一系列Pt纳米颗粒（NP）沉积的2D Ti ₃ C ₂ T _x MXene，其Pt含量相对较低（0.98–3.10 wt％），并且具有出色的HER催化活性和稳定性。电化学结果表明，制备的催化剂在ALD沉积循环达到40时表现出最佳的HER活性，其超电势为67.8 mV，接近工业Pt / C催化剂的超电势（64.2 mV）。优异的性能归因于Pt NPs的均匀分散和2D Ti ₃的良好电导率C ₂ T _x MXene支持。