电化学（中英文）2026，Vol.32Issue(8)：37-48,12.DOI:10.61558/2993-074X.3617
微波辅助合成Pd@PdPtCuFe凹面截角八面体纳米晶体用于多功能电催化
Microwave-Assisted Synthesis of Core-Shell Structured Pd@PdPtCuFe Recessed Truncated Octahedral Nanocrystals for Multifunctional Electrocatalysis
摘要
Abstract
Developing cost-efficient and durable multifunctional electrocatalysts of hydrogen evolution reaction,oxygen reduction reaction and oxygen evolution reaction is crucial for improving energy conversion efficiency in electrolytic water splitting electrolyzer and advancing rechargeable zinc-air batteries.Polyhedral shaped nanocrystals with well-defined crystal fac-ets represent a type of model catalysts that enables the exploration of structure-activity relationships.However,it is still very challenging to prepare alloy nanocrystals with multiple metal components due to their complicated redox potentials and mixing enthalpy.Herein,we report a rapid microwave-assisted polyol reduction method for syntheses of core-shell Pd@PdPtCu,Pd@PdPtCuNi,Pd@PdPtCuCo and Pd@PdPtCuZn octahedral nanocrystals,and recessed truncated-octahe-dral Pd@PdPtCuFe nanocrystals.Ascribing to the fast reduction and nucleation rate of Pd precursors,Pd core was firstly formed.Further concurrent reduction and efficient diffusion of the rest metal precursors resulted in the PdPtCu or PdPtCuM(M=Ni,Co,Fe and Zn)alloy shell.It was observed that Fe plays a decisive role in driving the morphological evolution from octahedral to recessed truncated-octahedral nanocrystals.The Fe³+-Br-coordination modulates crystal growth kinetics by al-tering surface adsorption dynamics,resulting in a mixed exposure of{111}and{100}facets rich in edge and vertex sites.Struc-tural analyses confirmed a well-defined Pd core and homogeneous PdPtCuFe alloy shell with a face-centered-cubic phase.Owing to the synergistic electronic coupling between Fe and noble-metal components and the strain-regulated surface con-figuration,the obtained Pd@PdPtCuFe/C exhibited superior multifunctional activity with a HER overpotential of 18 mV at 10 mA·cm-² and Tafel slope of 27 mV·dec-1,the most active HER catalyst among the five prepared core@shell catalysts and superior to commercial Pt/C.In addition,it delivered an OER overpotential of 360 mV at 10 mA·cm-² and a Tafel slope of 75.9 mV·dec-¹,comparable to benchmark IrO2 catalysts.All the prepared catalysts exhibited certain ORR activity in alka-line electrolytes,and the champion catalyst Pd@PdPtCuFe/C is manifested with an ORR half-wave potential of 0.792 V in alkaline electrolytes.When applied as a cathode catalyst in ZABs,the Pd@PdPtCuFe/C showed a peak power density of 81.2 mW·cm-² and maintained stable upon cycling for over 50 h.This work provides a generalizable route for ultrafast mor-phology-controlled synthesis of multimetallic nanocrystals,paving the way for the rational design of high-performance,low-PGM bifunctional catalysts for next-generation energy conversion and storage systems.关键词
合金/核壳结构/八面体/截角八面体/多功能电催化Key words
Octahedra/Recessed truncated-octahedra/Microwave-assisted/Core-shell/Multifunctional electrocatalysis引用本文复制引用
胡德忠,姜文丹,黄伟杰,杨俊,康雄武..微波辅助合成Pd@PdPtCuFe凹面截角八面体纳米晶体用于多功能电催化[J].电化学（中英文）,2026,32(8):37-48,12.基金项目
This work was supported by International Science and Technology Cooperation Programs of Guang-dong Province(No.2025A0505020017)and the Natu-ral Science Foundation of Guangdong Province(No.2024A1515010030). （No.2025A0505020017）
