Magnetic, recyclable PtyCo1−y/Ti3C2X2 (X = O, F) catalyst: a facile synthesis and enhanced catalytic activity for hydrogen generation from the hydrolysis of ammonia borane

Abstract

Exploring the applications of two dimensional layered Ti₃C₂X₂ (X = OH, F) is of great importance because of its excellent physical and chemical properties. Herein, we report the synthesis of the bimetallic catalyst Pt_yCo_1−y/Ti₃C₂X₂via a facile one-pot approach using Ti₃C₂X₂ as the support. The in situ synthesized Pt_yCo_1−y/Ti₃C₂X₂ is subsequently applied as a catalyst for hydrogen evolution from the hydrolysis of ammonia borane at 25 °C. Experimental results show that Pt_0.08Co_0.92/Ti₃C₂X₂ exhibits excellent catalytic activity for the hydrolysis of ammonia borane with a high hydrogen generation rate of 100.7 L H₂ (min g_Pt)⁻¹ and turnover frequency of 727 mol H₂ (min mol_Pt)⁻¹ because of the synergistic effect between Pt and Co. Moreover, Pt_0.08Co_0.92/Ti₃C₂X₂ could be recovered from the reaction mixture by a magnet and recycled at least seven times, thus showing its high recycling efficiency.