摘要

Direct hydrogen peroxide fuel cells have inspired the benign interests for air-independent submarine and underwater unmanned electronic applications.Yet,the process of H2O2 reduction reaction is significantly hindered by the sluggish electron transfer kinetics and poor mass transport efficiency.Herein,a three-dimensional monolithic silver nanowire aerogel assisted by the graphene monolayers is prepared,and validated as a promising H2O2 reduction catalyst.The interconnected,continuous aerogels and the substrate-free features allow the electron rapid flow and mass transport.Attributed to above advantages,the composites exhibit a high effectiveness and a low impedance during the catalysis.The direct hydrogen peroxide fuel cell equipped with these hybrid aerogels delivers a maximum power density of 1.4Wg~(-1)and 11.25Wg~(-1)$~(-1)based on the electrode weight and capital cost,which are substantially higher than previous values.The concept of building three-dimensional aerogels as self-standing electrodes provides a method for designing and manufacturing next-generation direct hydrogen peroxide fuel cells to bring the technology much closer to commercialization.

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