Morphology-controlled synthesis of multi-metal-based spinel oxide nanocatalysts and their performance for oxygen reduction  

作　　者：Can Li Jinfong Pan Xiaobo Chen Lihua Zhang Anna Dennett Prabhu Bharathan Douglas Lee Guangwen Zhou Jiye Fang 

机构地区：[1]Department of Chemistry,State University of New York at Binghamton,Binghamton,New York,USA [2]Materials Science and Engineering Program,State University of New York at Binghamton,Binghamton,New York,USA [3]Center for Functional Nanomaterials,Brookhaven National Laboratory,Upton,New York,USA [4]Department of Mechanical Engineering,State University of New York at Binghamton,Binghamton,New York,USA

出　　处：《Electron》2024年第3期13-19,共7页电子（英文）

基　　金：National Science Foundation,Division of Materials Research,Grant/Award Numbers:DMR-1808383,DMR-2347030,DMR-1905422;Department of Energy,Basic Energy Sciences,Grant/Award Number:DE-SC0012704。

摘　　要：We present a one-pot colloidal synthesis method for producing monodisperse multi-metal(Co,Mn,and Fe)spinel nanocrystals(NCs),including nanocubes,nano-octahedra,and concave nanocubes.This study explores the mechanism of morphology control,showcasing the pivotal roles of metal precursors and capping ligands in determining the exposed crystal planes on the NC surface.The cubic spinel NCs,terminated with exclusive{100}-facets,demonstrate superior electrocatalytic activity for the oxygen reduction reaction(ORR)in alkaline media compared to their octahedral and concave cubic counterparts.Specifically,at 0.85 V,(CoMn)Fe_(2)O_(4) spinel oxide nanocubes achieve a high mass activity of 23.9 A/g and exhibit excellent stability,highlighting the promising ORR performance associated with{100}-facets of multi-metal spinel oxides over other low-index and high-index facets.Motivated by exploring the correlation between ORR performance and surface atom arrangement(active sites),surface element composition,as well as other factors,this study introduces a prospective approach for shapecontrolled synthesis of advanced spinel oxide NCs.It underscores the significance of catalyst shape control and suggests potential applications as nonprecious metal ORR electrocatalysts.

关 键 词：alkaline media morphology control multi-metal spinel catalyst NANOCRYSTALS oxygen reduction 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]