{"id":49082,"date":"2023-01-16T19:01:47","date_gmt":"2023-01-16T18:01:47","guid":{"rendered":"https:\/\/www.upjs.sk\/?page_id=49082"},"modified":"2023-06-30T11:10:23","modified_gmt":"2023-06-30T10:10:23","slug":"strukturalna-zavislost-reakcie-vyvoja-vodika","status":"publish","type":"post","link":"https:\/\/www.upjs.sk\/strukturalna-zavislost-reakcie-vyvoja-vodika\/","title":{"rendered":"\u0160truktur\u00e1lna z\u00e1vislos\u0165 reakcie v\u00fdvoja vod\u00edka od teploty napra\u0161ovania v katalyz\u00e1toroch prechodn\u00fdch kovov v alkalickom prostred\u00ed"},"content":{"rendered":"\n
V tomto \u010dl\u00e1nku sme \u0161tudovali katalytick\u00fa aktivitu magnetr\u00f3nov\u00fdm napra\u0161ovan\u00edm tenk\u00fdch vrstiev Mo, V, Ni a Co pre reakciu v\u00fdvoja vod\u00edka (HER) v alkalickom prostred\u00ed. U niektor\u00fdch kovov sme pozorovali ve\u013emi ve\u013ek\u00e9 zv\u00fd\u0161enie aktivity HER, a to pre tenk\u00e9 vrstvy napra\u0161ovan\u00e9 pri zv\u00fd\u0161en\u00fdch teplot\u00e1ch v porovnan\u00ed s kovmi napra\u0161ovan\u00fdmi pri izbovej teplote. \u0160truktur\u00e1lna anal\u00fdza ukazuje, \u017ee Mo a V pripraven\u00e9 pri 800 \u00b0 C maj\u00fa \u0161trukt\u00faru fcc na rozdiel od tenk\u00fdch vrstiev t\u00fdchto kovov napra\u0161ovan\u00fdch pri izbovej teplote, ktor\u00e9 maj\u00fa \u0161trukt\u00faru bcc. V\u0161etky tenk\u00e9 vrstvy Ni a Co pripraven\u00e9 pri izbovej teplote a pri vysokej teplote mali \u0161trukt\u00faru fcc. \u00dadaje z impedan\u010dnej spektroskopie nazna\u010duj\u00fa, \u017ee fcc Mo je lep\u0161\u00ed katalyz\u00e1tor ako fcc Ni, ktor\u00fd sa be\u017ene vyu\u017e\u00edva na kon\u0161trukciu elektr\u00f3d v priemyseln\u00fdch alkalick\u00fdch elektrol\u00fdzeroch. Stabilitn\u00e9 testy tie\u017e nazna\u010duj\u00fa, \u017ee tenkovrstvov\u00e9 katalyz\u00e1tory fcc-Mo pripraven\u00e9 pri 800 \u00b0C s\u00fa odolnej\u0161ie katalyz\u00e1tory ako tenk\u00e9 vrstvy Ni. Na\u0161a \u0161t\u00fadia poukazuje na to, \u017ee \u0161truktur\u00e1lne f\u00e1zy katalyz\u00e1torov m\u00f4\u017eu by\u0165 k\u013e\u00fa\u010dov\u00fdm faktorom, ktor\u00fd riadi aktivitu prechodn\u00fdch kovov pre HER v alkalickom m\u00e9diu.<\/p>\n\n\n\n
V\u00fdsledky na\u0161ej \u0161t\u00fadie boli publikovan\u00e9 v prest\u00ed\u017enom \u010dasopise International Journal of Hydrogen Energy [M.Kozejova et al. Structural dependence of hydrogen evolution reaction on transition metal catalysts sputtered at different temperatures in alkaline media. International Journal of Hydrogen Energy 47 (2022) 26987-26999], ktor\u00fd m\u00e1 impaktov\u00fd faktor 7,139.<\/p>\n\n\n\n