ʻO ka carbonized melamine foam, i hoʻolauna ʻia e kahi hui i alakaʻi ʻia e Jaephil Cho ma ka Ulsan National Institute of Science and Technology (Korea), kahi puke electrocatalyst maikaʻi loa no ka hōʻemi ʻana i ka oxygen i loko o nā wahie a me nā pā, hāʻawi i kahi hopena hiki ke hoʻemi i nā kumukūʻai akā hāʻawi i nā ʻeke metala-ea a me nā wahie.
Ua hoʻolauna mai kahi hui o nā kānaka ʻepekema Kōlea a me ʻAmelika i kahi mea hou no nā electrodes e pili ana i ka melamine foam a me ke kalapona ʻeleʻele kūpono. Hoʻomaʻalahi nui ka porosity kiʻekiʻe i ka lawe wikiwiki ʻana i ka nui a me ka nui o nā kikowaena hana catalytically e hoʻonui nui i ka hana hoʻemi oxygen o nā cathodes no nā cell wahie a me nā pila ea metala.
ʻO ka hopena i hana ʻia ma nā cathodes o nā wahie a me nā ʻeke metala-ea ʻo ia ka hoʻemi electrochemical o ka oxygen, ʻo ia hoʻi ka oxygen reduction reaction (ORR). ʻAʻole loa kēia pane ʻana ma muli o kona lohi, a ʻoi aku ka haʻahaʻa o ka pono o nā cell ma mua o ka hiki.
Pono ka catalytic cathode e hoʻopili i ka oxygen me ka wai, e lawe i nā electrons e hana i nā OH- i loko o ka hopena alkaline. ʻO ka pilikia ʻo ia i loko o kahi ʻōnaehana paʻakikī e pili ana i nā reactants paʻa, wai, a me ke kinoea, ʻoi aku ka lohi o ka lawe ʻana i ke kaʻina hana, ʻoi aku ka nui o ka hoʻokuʻu ʻana me nā density kiʻekiʻe o kēia manawa.
ʻO nā Cathodes i hana ʻia me ke kākoʻo kalapona porous (ʻeleʻele kalapona) kahi e hoʻopuehu maikaʻi ʻia ai kahi metala hana catalytically e like me ka platinum hiki ke hōʻemi maikaʻi i kēia kaohi kinetic. Eia nō naʻe, he pipiʻi lākou a ʻaʻole paʻa loa, no laila e hana ʻole ai lākou no ka hoʻohana ākea.
ʻO kahi hui i alakaʻi ʻia e Jaephil Cho ma ka Ulsan National Institute of Science and Technology (Korea) a me Meilin Liu ma ka Georgia Institute of Technology (USA) no laila ke manaʻo nei e hoʻomohala i kahi koho ʻoi aku ka waiwai.
Ua hoʻoikaika ʻia lākou e ke ʻano tetrapod (Greek tetra: ʻehā, podes: feet) o nā mea haʻihaʻi e hoʻohui i kahi electrocatalyst maikaʻi loa. ʻO nā Tetrapods, nona nā "wāwae" ʻehā i kuhikuhi ʻia i nā kihi o kahi tetrahedron noʻonoʻo, ua kūkulu ʻia ma kahakai a ma kahi kokoke i nā pā a me nā uwa e hōʻemi ai i ka ikaika o ka nalu i kahakai. Hāʻawi kēia mau hale i wahi hoʻāno no nā ʻano ola kai i loko o ko lākou mau lua nui. Ke hoʻoheheʻe ʻia ka huʻa melamine a lepo me ka mortar a me ka pestle, hana ia i nā ʻāpana microscopic e like me nā tetrapods.
Ua mālama nā kānaka ʻepekema i ka melamine foam me ka hao chloride a me ka nitrogen-doped ketjenblack (e alakaʻi ana i nā pellets o ke kalapona ʻeleʻele). Ua hoʻokahe ʻia kēia huahana a lawe ʻia me ka waikawa sulfuric. ʻO ka hopena o nā nanotetrapods i hoʻopaʻa ʻia me nā nanoparticles o ke kalapona ʻeleʻele he kiʻekiʻe kiʻekiʻe kikoʻī kikoʻī kikoʻī, kahi nui o nā kikowaena catalytically active (Fe/Fe).3C, a me nā pūʻulu CN), a me nā pores he nui e hiki ai ke lawe wikiwiki. ʻO nā cathodes i hana ʻia me kēia mea electrode hou he mau hana lōʻihi loa a maikaʻi loa, hoʻohālikelike ʻia me nā cathodes i hoʻokumu ʻia me ka metala - ma ke kumu kūʻai haʻahaʻa loa. He wahi hoʻomaka maikaʻi paha kēia no ka hanauna hou o nā ʻeke ea metala a maikaʻi loa.
Ke kākoʻo nei ʻo SINOYQX i kekahi mau ʻoihana a me nā kulanui ma Kina no ka hoʻoheheʻe ʻana i ka melamine foam no ka hōʻemi ʻana i ka oxygen i loko o nā cell wahie a me nā pila.
Ua ʻōlelo ʻia kekahi mai http://www.chemistryviews.org/details/ezine/4153391/Inspired_by_a_Breakwater.html