Towards maximized utilization of iridium for the acidic oxygen evolution reaction

查看全文 作　　者：Marc [1]Ledendecker;Simon [1]Geiger;Katharina [1]Hengge;Joohyun [1]Lim;Serhiy [3]Cherevko;Andrea M. [1]Mingers;Daniel [1]Gohl;Guilherme V. [1,5]Fortunato;Daniel [2]Jalalpoor;Ferdi [2]Schuth;Christina [1]Scheu;Karl J. J. [1,3,4]Mayrhofer

机构地区：[1]Department of Interface Chemistry and Surface Engineering,Nanoanalytics and Interfaces Max-Planck-Institut fur Eisenforschung GmbH,40237 Dusseldorf,Germany;[2]Department of Heterogeneous Catalysis,Max-Planck-Institut fur Kohlenforschung,Kaiser- Wilhelm-Platz 1,45470 Mulheim an der Ruhr,Germany;[3]Helmholtz-Institute Erlangen-Nurnbergfar Renewable Energy (IEK-11),Forschungszentrum Jillich,91058 Erlangen,Germany;[4]Department of Chemical and Biological Engineering,Friedrich-Alexander- Universitat Erlangen -Nurnberg,91058 Erlangen,Germany;[5]Institute of Chemistry,Universidade Federal de Mato Grosso do Sul,Av. Senador Filin to Muller,1555,Campo Grande,MS 79074-460,Brazil

出　　处：《Nano Research》索引2019年第12卷第9期,共6页

摘　　要：The reduction in noble metal content for efficient oxygen evolution catalysis is a crucial aspect towards the large scale commercialisation of polymer electrolyte membrane electrolyzers.Since catalytic stability and activity are inversely related,long service lifetime still demands large amounts of low-abundant and expensive iridium.In this manuscript we elaborate on the concept of maximizing the utilisation of iridium for the oxygen evolution reaction.By combining different tin oxide based support materials with liquid atomic layer deposition of iridium oxide,new possibilities are opened up to grow thin layers of iridium oxide with tuneable noble metal amounts.In-situ,time-and potential-resolved dissolution experiments reveal how the stability of the substrate and the catalyst layer thickness directly affect the activity and stability of deposited iridium oxide.Based on our results,we elaborate on strategies how to obtain stable and active catalysts with maximized iridium utilisation for the oxygen evolution reaction and demonstrate how the activity and durability can be tailored correspondingly.Our results highlight the potential of utilizing thin noble metal films with earth abundant support.materials for future catalytic applications in the energy sector. 关键词：oxygen evolution reaction liquid ATOMIC layer depositi on CATALYSIS IRIDIUM CORE-SHELL nano particles

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Towards maximized utilization of iridium for the acidic oxygen evolution reaction

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