Kua arotakehia tēnei tuhinga i runga anō i ngā tikanga me ngā kaupapa here ētita a Science X. Kua whakanuia e ngā ētita ngā āhuatanga e whai ake nei, me te whakarite anō hoki i te pono o ngā ihirangi:
He rauemi nui te hauhā waro (CO2) mō te ora i runga i te Ao, ā, he hau kati kōtuhi hoki e whai wāhi ana ki te whakamahana o te ao. I ēnei rā, kei te ako ngā kaipūtaiao i te hauhā waro hei rauemi whai hua mō te whakaputa wahie waro-iti, whakahou, me ngā hua matū utu nui.
Ko te wero mā ngā kairangahau ko te tautuhi i ngā huarahi whai hua, ā, he iti hoki te utu hei huri i te hauhā waro ki ngā takawaenga waro kounga teitei pērā i te hauhā waro, te methanol, te waikawa formic rānei.
Kua kitea e te rōpū rangahau i arahina e KK Neuerlin o te National Renewable Energy Laboratory (NREL) me ngā hoa mahi i Argonne National Laboratory me Oak Ridge National Laboratory tētahi otinga whai hua mō tēnei raruraru. I whakawhanakehia e te rōpū tētahi tikanga hurihanga hei whakaputa waikawa formic mai i te hauhā waro mā te whakamahi i te hiko whakahou me te whai hua nui o te pūngao me te roa.
I whakaputaina te rangahau, ko "Scalable membrane electrode assembly architecture for efficient electrochemical conversion of carbon dioxide to formic acid" te taitara, i roto i te puka Nature Communications.
He matū takawaenga pea te waikawa formic, ā, he whānuitia ngā whakamahinga, inā koa hei rauemi mata i roto i ngā ahumahi matū, koiora rānei. Kua tautuhia hoki te waikawa formic hei rauemi whāngai mō te whakamahine koiora hei wahie rererangi ma.
Mā te hikohiko o te CO2 ka heke te CO2 ki ngā takawaenga matū pērā i te waikawa formic, ki ngā ngota rānei pērā i te ethylene ina whakamahia he pūmanawa hiko ki te pūtau hikohiko.
Ko te huihuinga membrane-electrode (MEA) i roto i te electrolyzer he mea hanga ki tētahi membrane kawe-katote (kirihou cation, anion rānei) e piri ana i waenganui i ngā irahiko e rua, arā, he electrocatalyst me tētahi polymer kawe-katote.
Mā te whakamahi i te tohungatanga o te tīma ki ngā hangarau pūtau wahie me te hikohiko hauwai, i akohia e rātou ētahi whirihoranga MEA i roto i ngā pūtau hikohiko hei whakarite i te whakaiti hikohiko o te CO2 ki te waikawa formic.
I runga i te tātari rahunga o ngā hoahoa rerekē, i whai te tīma ki te whakamahi i ngā herenga o ngā huinga rauemi o nāianei, inā koa te korenga o te panga katote i roto i ngā kiriuhi whakawhiti anion o nāianei, me te whakahaere i te hoahoa pūnaha whānui.
Ko te mea i hangaia e KS Neierlin rāua ko Leiming Hu o NREL he taputapu hiko MEA kua whakapaitia mā te whakamahi i tētahi kiriuhi whakawhiti kationi hou kua pokaia. Ka whakaratohia e tēnei kiriuhi pokaia he whakaputanga waikawa formic ōrite, tino whiriwhiri, ā, ka whakangawari i te hoahoa mā te whakamahi i ngā wāhanga kua oti te whakarite.
"Ko ngā hua o tēnei rangahau e tohu ana i tētahi panonitanga tauira i roto i te whakaputanga hikohiko o ngā waikawa waro pēnei i te waikawa formic," te kī a Neierlin, he kaituhi tahi. "Ka whakaitihia e te hanganga kiriuhi pokaiao te uaua o ngā hoahoa o mua, ā, ka taea hoki te whakamahi hei whakapai ake i te whai huatanga o te pūngao me te roa o ētahi atu taputapu hurihanga hauhā hikohiko."
Pērā i ngā putanga pūtaiao katoa, he mea nui kia mārama ki ngā āhuatanga utu me te whaihua ohaoha. I a rātou e mahi ana puta noa i ngā tari, i whakaatu ngā kairangahau NREL a Zhe Huang rāua ko Tao Ling i tētahi tātaritanga hangarau-ōhaoha e tohu ana i ngā huarahi hei whakatutuki i te ōritetanga utu me ngā tukanga whakaputa waikawa formic ahumahi o ēnei rā ina kei te 2.3 hēneti ia kilowatt-haora, kei raro iho rānei i te utu o te hiko whakahou.
"I tutuki i te tīma ēnei hua mā te whakamahi i ngā whakakorikori e wātea ana i te hokohoko me ngā rauemi kiriuhi polymer, me te hanga i tētahi hoahoa MEA e whakamahi ana i te kaha o ngā pūtau wahie hou me ngā tipu hiko hauwai," te kī a Neierlin.
"Ka taea e ngā hua o tēnei rangahau te āwhina i te huri i te hauhā waro hei wahie me ngā matū mā te whakamahi i te hiko me te hauwai ka taea te whakahou, kia tere ake ai te whakawhiti ki te tauine me te hokohoko."
Ko ngā hangarau hurihanga hikohiko tētahi o ngā kaupapa matua o te kaupapa Irahiko ki te Ngota a te NREL, e arotahi ana ki te hauwai whakahou o te whakatupuranga e whai ake nei, te kore wahie, te kore matū me ngā rauemi mō ngā tukanga e whakahaerehia ana e te hiko.
"Kei te tūhuratia e tā mātou kaupapa ngā huarahi hei whakamahi i te hiko hou hei huri i ngā ngota pēnei i te hauhā waro me te wai hei matū ka taea te whakamahi hei puna pūngao," te kī a Randy Cortright, te kaiwhakahaere o te rautaki whakawhiti irahiko me/ranei ngā matū mua a NREL mō te whakaputa wahie.
"He putanga hou tēnei rangahau hurihanga hikohiko ka taea te whakamahi i roto i te whānuitanga o ngā tukanga hurihanga hikohiko, ā, e tumanako ana mātou ki ētahi atu hua whai hua mai i tēnei rōpū."
Ētahi atu kōrero: Leiming Hu et al., Te hoahoa huihuinga hiko kiriuhi tauine mō te huringa hiko matū whai hua o te CO2 ki te waikawa formic, Nature Communications (2023). DOI: 10.1038/s41467-023-43409-6
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