E hoʻopiha i ka palapala ma lalo nei a e leka uila mākou iā ʻoe i ka PDF version of "Nā hoʻomaikaʻi ʻenehana hou e hoʻololi i ka carbon dioxide i wahie wai"
ʻO ka carbon dioxide (CO2) ka huahana o ka puhi ʻana i nā wahie mōʻalihaku a me ke kinoea ʻōmaʻomaʻo maʻamau, hiki ke hoʻohuli hou ʻia i mau wahie pono ma ke ʻano hoʻomau.ʻO kahi ala hoʻohiki e hoʻohuli ai i ka hoʻokuʻu ʻana o CO2 i mea ʻai wahie he kaʻina i kapa ʻia ʻo electrochemical reduction.Akā i mea e hiki ai ke kūʻai aku, pono e hoʻomaikaʻi ʻia ke kaʻina hana no ke koho ʻana a i ʻole ka hana ʻana i nā huahana i makemake nui ʻia.I kēia manawa, e like me ka mea i hōʻike ʻia ma ka puke pai Nature Energy, ua hoʻomohala ʻo Lawrence Berkeley National Laboratory (Berkeley Lab) i kahi ala hou e hoʻomaikaʻi ai i ka ʻili o ka copper catalyst i hoʻohana ʻia no ka hopena kōkua, ma laila e hoʻonui ai i ka koho o ke kaʻina.
"ʻOiai ua ʻike mākou ʻo ke keleawe ka mea hoʻoikaika maikaʻi loa no kēia pane ʻana, ʻaʻole ia e hāʻawi i ka koho kiʻekiʻe no ka huahana i makemake ʻia," wahi a Alexis, he kanaka ʻepekema kiʻekiʻe ma ke Keʻena ʻepekema ʻepekema ma Berkeley Lab a he kaukaʻi o ka ʻenekinia kemika ma ke Kulanui. o Kaleponi, Berkeley.Ua ʻōlelo ʻo Spell."Ua ʻike kā mākou hui hiki iā ʻoe ke hoʻohana i ke kaiapuni kūloko o ka catalyst e hana i nā hoʻopunipuni like ʻole e hāʻawi i kēia ʻano koho."
Ma nā haʻawina mua, ua hoʻokumu ka poʻe noiʻi i nā kūlana kūpono e hāʻawi i ka ʻenehana uila a me nā kemika maikaʻi loa no ka hana ʻana i nā huahana waiwai kalapona me ka waiwai kūʻai.Akā, kū'ē kēia mau kūlana i nā kūlana i hana maoli ʻia i loko o nā pūla wahie maʻamau me ka hoʻohana ʻana i nā mea conductive e pili ana i ka wai.
I mea e hoʻoholo ai i ka hoʻolālā i hiki ke hoʻohana ʻia i loko o ka wahie kaiapuni wai, ma ke ʻano he ʻāpana o ka Energy Innovation Center papahana o ka Ministry of Energy's Liquid Sunshine Alliance, ua huli ʻo Bell a me kāna hui i kahi ʻāpana lahilahi o ka ionomer. nā molekala (ions) e hele ai.E hoʻokaʻawale i nā ion ʻē aʻe.Ma muli o kā lākou mau waiwai kemika koho, kūpono loa lākou no ka loaʻa ʻana o ka hopena ikaika i ka microenvironment.
ʻO Chanyeon Kim, kahi mea noiʻi postdoctoral ma ka hui Bell a me ka mea kākau mua o ka pepa, ua manaʻo e uhi i ka ʻili o nā catalysts keleawe me ʻelua ionomers maʻamau, Nafion a me Sustainion.Manaʻo ka hui e hoʻololi i ke kaiapuni kokoke i ka catalyst-me ka pH a me ka nui o ka wai a me ka carbon dioxide-ma kekahi ala e kuhikuhi ai i ka hopena e hana i nā huahana waiwai kalapona i hiki ke hoʻololi maʻalahi i nā kemika pono.Nā huahana a me nā wahie wai.
Hoʻopili nā mea noiʻi i kahi ʻāpana lahilahi o kēlā me kēia ionomer a me kahi papalua o nā ionomers ʻelua i kahi kiʻi keleawe i kākoʻo ʻia e kahi mea polymer e hana ai i kahi kiʻiʻoniʻoni, hiki iā lākou ke hoʻokomo ma kahi kokoke i hoʻokahi ʻaoʻao o kahi pūlima electrochemical.I ka hoʻokomo ʻana i ka carbon dioxide i loko o ka pākaukau a hoʻohana i ka volta, ua ana lākou i ka nui o ke au e kahe ana ma ka pākaukau.A laila ana lākou i ke kinoea a me ka wai i hōʻiliʻili ʻia i loko o ka waihona e pili ana i ka wā o ka hopena.No ka hihia ʻelua-papa, ua ʻike lākou he 80% ka nui o ka ikehu i hoʻopau ʻia e ka hopena - ʻoi aku ka kiʻekiʻe ma mua o 60% i ka hihia uncoated.
"Ke hāʻawi nei kēia uhi sandwich i ka maikaʻi o nā ao ʻelua: ke koho kiʻekiʻe o ka huahana a me ka hana kiʻekiʻe," wahi a Bell.ʻAʻole maikaʻi ka ʻaoʻao pālua ʻelua no nā huahana waiwai kalapona, akā hoʻopuka pū kekahi i kahi au ikaika i ka manawa like, e hōʻike ana i ka piʻi ʻana o ka hana.
Ua hoʻoholo ka poʻe noiʻi ʻo ka pane i hoʻomaikaʻi ʻia ʻo ia ka hopena o ka hoʻonui CO2 kiʻekiʻe i hōʻiliʻili ʻia i loko o ka uhi pololei ma luna o ke keleawe.Eia kekahi, ʻo nā molekele i hoʻopiʻi maikaʻi ʻia e hōʻiliʻili i ka ʻāpana ma waena o nā ionomers ʻelua e hoʻohua i ka acidity kūloko.Hoʻopau kēia hui ʻana i nā kālepa hoʻopaʻapaʻa e hana ʻia me ka ʻole o nā kiʻiʻoniʻoni ionomer.
I mea e hoʻomaikaʻi hou ai i ka maikaʻi o ka hopena, ua huli nā mea noiʻi i kahi ʻenehana i hōʻoia mua ʻia ʻaʻole pono i kahi kiʻi ionomer e like me ke ʻano ʻē aʻe e hoʻonui ai i ka CO2 a me ka pH: pulsed voltage.Ma ka hoʻohana ʻana i ka volta pulsed i ka uhi ʻana ionomer pālua, ua loaʻa i nā mea noiʻi ka piʻi ʻana o 250% o nā huahana waiwai kalapona i hoʻohālikelike ʻia me ke keleawe ʻole a me ka volta static.
ʻOiai ke nānā aku nei kekahi poʻe noiʻi i kā lākou hana i ka hoʻomohala ʻana i nā catalysts hou, ʻaʻole i noʻonoʻo ka loaʻa ʻana o ka catalyst i nā kūlana hana.ʻO ka hoʻomalu ʻana i ke kaiapuni ma ka ʻili catalyst he ala hou a ʻokoʻa.
"ʻAʻole mākou i hele mai me kahi catalyst hou loa, akā ua hoʻohana mākou i ko mākou ʻike i nā kinetics reaction a hoʻohana i kēia ʻike e alakaʻi iā mākou i ka noʻonoʻo e pili ana i ka hoʻololi ʻana i ke kaiapuni o ka pūnaewele catalyst," wahi a Adam Weber, he ʻenekinia kiʻekiʻe.ʻO nā kānaka ʻepekema ma ke kahua o ka ʻenehana ikehu ma Berkeley Laboratories a me ka mea kākau pū i nā pepa.
ʻO ka hana aʻe e hoʻonui i ka hana ʻana o nā catalysts coated.ʻO nā hoʻokolohua mua o ka hui Berkeley Lab e pili ana i nā ʻōnaehana kumu hoʻohālike liʻiliʻi liʻiliʻi, ʻoi aku ka maʻalahi ma mua o nā hale porous ʻāpana nui i koi ʻia no nā noi kalepa."ʻAʻole paʻakikī ka hoʻopili ʻana i kahi uhi ma kahi pālahalaha.Akā ʻo nā ʻano hana pāʻoihana e pili ana i ka uhi ʻana i nā pōpō keleawe liʻiliʻi, "wahi a Bell.He mea paʻakikī ka hoʻohui ʻana i kahi papa lua o ka uhi.Hoʻokahi mea hiki ke hoʻohui a waiho i nā ʻāpana ʻelua i loko o kahi mea hoʻoheheʻe, a me ka manaʻolana e hoʻokaʻawale lākou i ka wā e hoʻoheheʻe ʻia ai ka solvent.Pehea inā ʻaʻole lākou?Ua hoʻopau ʻo Bell: "Pono mākou e maʻalahi."E nānā iā Kim C, Bui JC, Luo X a me nā mea ʻē aʻe.ʻO ka microenvironment catalyst maʻamau no ka hoʻemi electro-reduction o CO2 i nā huahana multi-carbon me ka hoʻohana ʻana i ka uhi ionomer pālua ma luna o ke keleawe.Nat Energy.2021;6(11):1026-1034.doi:10.1038/s41560-021-00920-8
Hoʻopuka hou ʻia kēia ʻatikala mai nā mea aʻe.'Ōlelo Aʻo: Ua hoʻoponopono ʻia paha ka lōʻihi a me ka ʻike.No ka ʻike hou aku, e ʻoluʻolu e kelepona i ke kumu i ʻōlelo ʻia.
Ka manawa hoʻouna: Nov-22-2021
