DC FieldValueLanguage
dc.contributor.authorJohny, Jacob-
dc.contributor.authorLi, Yao-
dc.contributor.authorKamp, Marius-
dc.contributor.authorPrymak, Oleg-
dc.contributor.authorLiang, Shun Xing-
dc.contributor.authorKrekeler, Tobias-
dc.contributor.authorRitter, Martin-
dc.contributor.authorKienle, Lorenz-
dc.contributor.authorRehbock, Christoph-
dc.contributor.authorBarcikowski, Stephan-
dc.contributor.authorReichenberger, Sven-
dc.date.accessioned2021-11-25T11:39:44Z-
dc.date.available2021-11-25T11:39:44Z-
dc.date.issued2021-
dc.identifier.citationNano Research : (2021) (in press; CC BY 4.0)de_DE
dc.identifier.issn1998-0124de_DE
dc.identifier.urihttp://hdl.handle.net/11420/11077-
dc.description.abstractHigh entropy metallic glass nanoparticles (HEMG NPs) are very promising materials for energy conversion due to the wide tuning possibilities of electrochemical potentials offered by their multimetallic character combined with an amorphous structure. Up until now, the generation of these HEMG NPs involved tedious synthesis procedures where the generated particles were only available on highly specialized supports, which limited their widespread use. Hence, more flexible synthetic approaches to obtain colloidal HEMG NPs for applications in energy conversion and storage are highly desirable. We utilized pulsed laser ablation of bulk high entropy alloy targets in acetonitrile to generate colloidal carbon-coated CrCoFeNiMn and CrCoFeNiMnMo HEMG NPs. An in-depth analysis of the structure and elemental distribution of the obtained nanoparticles down to single-particle levels using advanced transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) methods revealed amorphous quinary and senary alloy phases with slight manganese oxide/hydroxide surface segregation, which were stabilized within graphitic shells. Studies on the catalytic activity of the corresponding carbon-HEMG NPs during oxygen evolution and oxygen reduction reactions revealed an elevated activity upon the incorporation of moderate amounts of Mo into the amorphous alloy, probably due to the defect generation by atomic size mismatch. Furthermore, we demonstrate the superiority of these carbon-HEMG NPs over their crystalline analogies and highlight the suitability of these amorphous multi-elemental NPs in electrocatalytic energy conversion. [Figure not available: see fulltext.]en
dc.language.isoende_DE
dc.relation.ispartofNano researchde_DE
dc.subjectamorphousde_DE
dc.subjectcatalysisde_DE
dc.subjecthigh entropy alloyde_DE
dc.subjectoxygen evolution reactionde_DE
dc.subjectoxygen reduction reactionde_DE
dc.subjectpulsed laser ablation in liquidde_DE
dc.titleLaser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalystsde_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishHigh entropy metallic glass nanoparticles (HEMG NPs) are very promising materials for energy conversion due to the wide tuning possibilities of electrochemical potentials offered by their multimetallic character combined with an amorphous structure. Up until now, the generation of these HEMG NPs involved tedious synthesis procedures where the generated particles were only available on highly specialized supports, which limited their widespread use. Hence, more flexible synthetic approaches to obtain colloidal HEMG NPs for applications in energy conversion and storage are highly desirable. We utilized pulsed laser ablation of bulk high entropy alloy targets in acetonitrile to generate colloidal carbon-coated CrCoFeNiMn and CrCoFeNiMnMo HEMG NPs. An in-depth analysis of the structure and elemental distribution of the obtained nanoparticles down to single-particle levels using advanced transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) methods revealed amorphous quinary and senary alloy phases with slight manganese oxide/hydroxide surface segregation, which were stabilized within graphitic shells. Studies on the catalytic activity of the corresponding carbon-HEMG NPs during oxygen evolution and oxygen reduction reactions revealed an elevated activity upon the incorporation of moderate amounts of Mo into the amorphous alloy, probably due to the defect generation by atomic size mismatch. Furthermore, we demonstrate the superiority of these carbon-HEMG NPs over their crystalline analogies and highlight the suitability of these amorphous multi-elemental NPs in electrocatalytic energy conversion. [Figure not available: see fulltext.]de_DE
tuhh.publisher.doi10.1007/s12274-021-3804-2-
tuhh.publication.instituteBetriebseinheit Elektronenmikroskopie M-26de_DE
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
dc.identifier.scopus2-s2.0-85113964483-
item.creatorOrcidJohny, Jacob-
item.creatorOrcidLi, Yao-
item.creatorOrcidKamp, Marius-
item.creatorOrcidPrymak, Oleg-
item.creatorOrcidLiang, Shun Xing-
item.creatorOrcidKrekeler, Tobias-
item.creatorOrcidRitter, Martin-
item.creatorOrcidKienle, Lorenz-
item.creatorOrcidRehbock, Christoph-
item.creatorOrcidBarcikowski, Stephan-
item.creatorOrcidReichenberger, Sven-
item.languageiso639-1en-
item.creatorGNDJohny, Jacob-
item.creatorGNDLi, Yao-
item.creatorGNDKamp, Marius-
item.creatorGNDPrymak, Oleg-
item.creatorGNDLiang, Shun Xing-
item.creatorGNDKrekeler, Tobias-
item.creatorGNDRitter, Martin-
item.creatorGNDKienle, Lorenz-
item.creatorGNDRehbock, Christoph-
item.creatorGNDBarcikowski, Stephan-
item.creatorGNDReichenberger, Sven-
item.openairetypeArticle-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.mappedtypeArticle-
item.fulltextNo Fulltext-
item.cerifentitytypePublications-
crisitem.author.deptBetriebseinheit Elektronenmikroskopie M-26-
crisitem.author.deptBetriebseinheit Elektronenmikroskopie M-26-
crisitem.author.orcid0000-0002-5664-859X-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.author.parentorgStudiendekanat Maschinenbau-
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