耐久型四元PtPdRuCu纳米管作为燃料电池氧还原高效电催化剂研究OA

Fuel cells offer advantages such as zero emissions,high efficiency and sustainability,and boast promising development prospects.However,their large-scale commercialization is hindered by the sluggish kinetics of the cathodic oxygen reduction reaction and the high cost of platinum-based catalysts.Developing alternative catalysts with low platinum loading,high activity,and superior stability is a key research focus and challenge.In this study,a precise structural engineering strategy is employed,using copper nanowires as a sacrificial template combined with galvanic replacement/reduction and dealloying processes,to successfully construct quaternary PtPdRuCu nanotubes.This unique structure not only significantly enhances platinum atom utilization,but also,through multi-component synergy,effectively optimizes the electronic structure of platinum sites.This electronic modulation weakens the strong adsorption of oxygenated intermediates,thereby breaking the reaction kinetic limitations.Experimental results demonstrate that the catalyst exhibits a remarkable mass activity of 1.11 A/mgPt at 0.9 V(vs.RHE),which is 4.27 times that of commercial Pt/C.Furthermore,after 30 000 accelerated durability test cycles,the activity loss is only about 1％,indicating exceptional stability.This work provides a new design concept and a feasible synthesis pathway for developing next-generation high-performance,low-platinum fuel cell catalysts.