Highly Excavated Octahedral Nanostructures Integrated from Ultrathin Mesoporous PtCu Nanosheets: Construction of Three-Dimensional Open Surfaces for Enhanced Electrocatalysis.

Developing electrocatalysts with ultrathin nanostructures and high mesoporosity is a relevant high-priority research direction toward enhancing the performance of noble metals. Herein, mesoporous, highly excavated octahedral PtCu nanostructures are prepared by a facile one-pot synthesis. The mesoporous, highly excavated octahedral PtCu nanostructures are built with mutually perpendicular interlaced mesoporous nanosheets with a thickness of ≈4.5 nm. Benefiting from its mesoporous features, three-dimensional (3D) open surfaces, ultrathin nanosheets, and a Cu-rich surface, PtCu exhibits excellent electrocatalytic performance and high antipoisoning activity toward the methanol oxidation reaction.