(187f) Synthesis of Cu3pt Ordered Single Atom Alloy and Non-Precious Metal Based Catalysts for Enhanced Hydrogen Evolution Reaction

Heavy reliance on fossil fuels has led to their depletion and triggered harmful environmental issues, including global warming, which is essential to exploret the renewable energy sources like solar, wind, and hydrogen. Among these options, hydrogen (H₂) is a promising choice because it has the highest energy density by weight and only produces water when burned, making it an excellent and environmentally friendly energy carrier. However, the majority of H₂ production currently comes from fossil fuels through a process that not only has low efficiency but also generates CO₂ emissions. Comparing with the traditional method, using renewable energy sources to drive the electrochemical hydrogen evolution reaction (HER) has significant potential for efficient hydrogen production, which is clean and renewable. Currently, although Pt is recognized as the top catalyst for HER, the high cost and limited availability of Pt pose obstacles to its widespread use. This drives the search for new catalysts that are affordable, aiming to replace Pt while retaining strong catalytic activity. Additionally, efforts are being made to explore different structures of Pt catalysts to enhance Pt's activity and stability in HER. To overcome this obstacle, two promising ways involve designing new catalyst structure to improve Pt atom efficiency and reducing Pt loading, and even substituting Pt with non-precious metal to design catalysts. Herein, we reported a synthesis of Cu₃Pt ordered single atom alloy(SAA) nanocages with high Pt atomic utilization which remained as an efficient catalyst for HER, exhibiting a lower overpotential of 16 mV at 10 mA/cm² for HER. Moreover, we designed uniformed NiMoCo nanoparticles to explore the effect of doping with a third precursor into the NiMo to modify hydrogen intermediates absorption for HER performance. Specifically, the NiMoCo exhibited a reduced overpotential from 110 mV to 60 mV at 10 mA/cm² with optimized Co doping.