State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, P.R. China.
Chem Asian J. 2019 Nov 4;14(21):3868-3874. doi: 10.1002/asia.201901098. Epub 2019 Sep 26.
Designing and constructing nano-architectures with abundant reactive atoms exposed on the surface and widely open pore interiors is an effective strategy for highly efficient utilization of Pt-based catalysts. Herein, we report a facile method to synthesize tri-metallic PtPdIr mesoporous hollow nanospheres (PtPdIr MHNSs) by selective chemical removal of sacrificial metallic cores from pre-constructed Pd@PtIr mesoporous nanospheres (Pd@PtIr MNSs). The unique nano-architectures, with mesoporous shells interconnected into the interior hollow cavities and the synergistic electronic effect from tri-metallic PtPdIr composition, enable the as-synthesized PtPdIr MHNSs to be efficient bifunctional electrocatalysts for catalyzing both methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR).
设计和构建具有丰富表面反应原子和广泛开放孔内的纳米结构是高效利用基于 Pt 的催化剂的有效策略。在此，我们报告了一种简便的方法，通过选择性化学去除预构建的 Pd@PtIr 介孔纳米球（Pd@PtIr MNSs）中的牺牲金属核来合成三元 PtPdIr 介孔中空纳米球（PtPdIr MHNSs）。独特的纳米结构，具有介孔壳相互连接到内部中空腔和三元 PtPdIr 组成的协同电子效应，使合成的 PtPdIr MHNSs 成为高效的双功能电催化剂，可同时催化甲醇氧化反应（MOR）和氧还原反应（ORR）。
