Ua hoʻomohala kahi hui noiʻi Kelemania i nā supercrystals ʻelua-dimensional bimetallic me nā waiwai catalytic maikaʻi loa. Hiki ke hoʻohana ʻia iā lākou e hana i ka hydrogen ma ka hoʻoheheʻe ʻana i ka waikawa formic, me nā hopena moʻolelo.
Ua hoʻomohala nā kānaka ʻepekema i alakaʻi ʻia e ke Kulanui ʻo Ludwig Maximilian o Munich (LMU Munich) ma Kelemania i kahi ʻenehana photocatalytic no ka hana hydrogen e pili ana i nā supercrystals ʻelua-dimensional bimetallic plasma.
Ua hōʻuluʻulu nā kānaka noiʻi i nā ʻano plasmonic ma ka hoʻohui ʻana i nā nanoparticles gula pākahi (AuNPs) a me nā nanoparticles platinum (PtNPs).
Ua ʻōlelo ʻo Emiliano Cortes, ka mea noiʻi: "He kūpono loa ka hoʻonohonoho ʻana o nā nanoparticles gula i ka hoʻopili ʻana i ka mālamalama hanana a me ka hoʻoulu ʻana i nā kahua uila kūloko ikaika, i kapa ʻia he mau wahi wela, e hana ʻia ma waena o nā ʻāpana gula."
Ma ke ʻano hoʻonohonoho ʻōnaehana i manaʻo ʻia, launa pū ka mālamalama ʻike ʻia me nā electrons i loko o ka metala a hoʻoulu iā lākou e haʻalulu me ka resonantly, e hoʻoulu ai i nā electrons e neʻe wikiwiki mai kekahi ʻaoʻao o ka nanoparticle a i kekahi. Hoʻokumu kēia i kahi magnet liʻiliʻi i kapa ʻia e nā loea he dipole moment.
ʻO ia ka huahana o ka nui o ka hoʻouka a me ka mamao ma waena o nā kikowaena o nā hoʻouka maikaʻi a me nā hoʻouka maikaʻi ʻole. Ke hana ʻia kēia, hopu nā nanoparticles i ka nui o ka lā a hoʻololi iā ia i mau electrons ikaika loa. Kōkua lākou i ka hoʻomalu ʻana i nā hopena kemika.
Ua hoʻāʻo ke kaiāulu hoʻonaʻauao i ka pono o nā plasmonic bimetallic 2D supercrystals i ka hoʻoheheʻe ʻana i ka waikawa formic.
"Ua koho ʻia ka hopena probe no ka mea ʻoi aku ka liʻiliʻi o ka pane ʻana o ke gula ma mua o ka platinum a no ka mea he mea lawe H2 carbon-neutral ia," wahi a lākou.
"ʻO ka hana i hoʻonui ʻia e ka hoʻokolohua o ka platinum ma lalo o ka hoʻomālamalama ʻana e hōʻike ana i ka pilina o ka mālamalama me ka pūʻulu gula e hopena i ka hoʻokumu ʻia ʻana o ka platinum ma lalo o ka uila," wahi a lākou. "ʻOiaʻiʻo, i ka wā e hoʻohana ʻia ai ka waikawa formic ma ke ʻano he mea lawe H2, ʻike ʻia nā supercrystals AuPt e loaʻa ka hana plasma maikaʻi loa."
Ua hōʻike ke aniani i ka nui o ka hana ʻana o ka H2 he 139 mmol no ka gram o ka mea hoʻouluulu i kēlā me kēia hola. Ua ʻōlelo ka hui noiʻi ʻo ia hoʻi, ʻo ka mea photocatalytic i kēia manawa ke paʻa nei i ka moʻolelo honua no ka hana ʻana i ka hydrogen ma o ka dehydrogenating formic acid ma lalo o ka mana o ka mālamalama ʻike ʻia a me ka radiation o ka lā.
Manaʻo nā kānaka ʻepekema i kahi hopena hou ma ka pepa "Plasmonic bimetallic 2D supercrystals for hydrogen generation," i paʻi ʻia nei ma ka puke pai ʻo Nature Catalice. Aia pū ka hui i nā mea noiʻi mai ke Kulanui Free o Berlin, ke Kulanui o Hamburg a me ke Kulanui o Potsdam.
"Ma ka hoʻohui ʻana i nā plasmons a me nā metala catalytic, ke holomua nei mākou i ka hoʻomohala ʻana o nā photocatalysts ikaika no nā noi ʻoihana. He ala hou kēia e hoʻohana ai i ka lā a loaʻa pū kekahi i ka hiki ke hana i nā hopena ʻē aʻe, e like me ka hoʻololi ʻana i ke kalapona dioxide i nā mea pono," wahi a Cole Thes. .
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