The development of direct methanol fuel cell technology is expected to ease the excessive consumption of non-renewable fossil fuels, which puts forward a new request for the exploration of advanced Pt-alternative electrocatalysts toward the methanol oxidation reaction (MOR). Here, we demonstrate a facile and robust bottom-up method for the spatial construction of three-dimensional (3D) porous rhodium–copper alloy nanoflowers stereoassembled on Ti₃C₂T_x MXene nanosheets (RhCu NF/Ti₃C₂T_x) through an in situ soft-chemistry process. With the synergistic contributions from the distinctive structural merits, such as the 3D nanoflower-shaped configuration, abundant porosity, bimetallic alloy and strain effects, and excellent metallic conductivity, the resultant RhCu NF/Ti₃C₂T_x nanoarchitectures manifest significantly boosted electrocatalytic MOR performance under alkaline conditions, which is more competitive than that of conventional particle-shaped Rh catalysts dispersed on Ti₃C₂T_x nanosheets, graphene, carbon nanotubes, carbon black and commercial Pt/carbon black and Pd/carbon black catalysts.

中文翻译：

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在 Ti3C2Tx MXene 上立体组装的三维多孔铑铜合金纳米花作为高效甲醇氧化电催化剂


直接甲醇燃料电池技术的发展有望缓解不可再生化石燃料的过度消耗，这为探索先进的 Pt 替代电催化剂对甲醇氧化反应 （MOR） 提出了新的要求。在这里，我们展示了一种简单而稳健的自下而上的方法，用于通过原位立体组装在 Ti₃C₂T_x MXene 纳米片 （RhCu NF/Ti₃C₂T_x） 上的三维 （3D） 多孔铑铜合金纳米花的空间构建软化学工艺。凭借独特的结构优点的协同作用，例如 3D 纳米花形构型、丰富的孔隙率、双金属合金和应变效应以及优异的金属导电性，所得的 RhCu NF/Ti₃C₂T_x 纳米结构在碱性条件下表现出显着提升的电催化 MOR 性能，这比传统结构更具竞争力分散在 Ti₃C₂T_x 纳米片、石墨烯、碳纳米管、炭黑和商用 Pt/炭黑和 Pd/炭黑催化剂上的颗粒状 Rh 催化剂。