{"id":9128,"date":"2021-11-23T14:13:12","date_gmt":"2021-11-23T14:13:12","guid":{"rendered":"https:\/\/www.upjs.sk\/informacie\/vyskum\/vedeckovyskumna-cinnost\/spickove-timy\/qmagna-tim\/aktuality\/26066-2\/"},"modified":"2023-06-30T10:50:34","modified_gmt":"2023-06-30T09:50:34","slug":"26066-2","status":"publish","type":"post","link":"https:\/\/www.upjs.sk\/26066-2\/","title":{"rendered":"Elektrochemick\u00fd indukovan\u00fd v\u00fdvoj pnutia v nano\u010dasticiach na b\u00e1ze Pt-Ni pozorovan\u00fd pomocou Braggovho koherentn\u00e9ho difrak\u010dn\u00e9ho zobrazovania"},"content":{"rendered":"\n
V tejto \u0161t\u00fadii sa vedci z \u00dastavu fyzik\u00e1lnych vied, UPJ\u0160 spojili s kolegami z USA a Japonska a spolo\u010dne pou\u017eili jednu z najmodernej\u0161\u00edch mikroskopick\u00fdch metod\u00edk na synchrotr\u00f3ne tzv. Braggovo koherentn\u00e9 difrak\u010dn\u00e9 zobrazovanie (BCDI), aby odhalili v\u00fdvoj nap\u00e4tia v nano\u010dasticiach katalyz\u00e1tora na b\u00e1ze zliatiny Pt\u2013Ni. Tieto syst\u00e9my s\u00fa d\u00f4le\u017eit\u00fdmi materi\u00e1lmi pre zariadenia na elektrochemick\u00fa konverziu energie pre vod\u00edkov\u00fa ekonomiku, ako s\u00fa vod\u00edkov\u00e9 palivov\u00e9 \u010dl\u00e1nky. Pnutie v obale nano\u010dastice, ktor\u00e9 z\u00e1vis\u00ed na jej zlo\u017een\u00ed, bolo v zhode s jej katalytickou aktivitou.
Predlo\u017een\u00e1 \u0161t\u00fadia demon\u0161truje, \u017ee BCDI umo\u017e\u0148uje kvantitat\u00edvne stanovenie pnutia v povrchov\u00fdch vrstv\u00e1ch nano\u010dast\u00edc zliatin na b\u00e1ze Pt-Ni po\u010das elektrochemick\u00fdch reakci\u00ed, \u010do poskytuje prostriedok na povrchov\u00e9ho pnutia ako hlavn\u00e9ho parametra na navrhovanie \u0161irokej \u0161k\u00e1ly elektrokatalyz\u00e1torov. \u010cl\u00e1nok bol publikovan\u00fd v prest\u00ed\u017enom \u010dasopise Nanoletters (Nano Lett. 2021, 21, 5945-5951) s impakt faktorom 11,189. <\/p>\n\n\n\n