Cobalt tuaj yeem txuag tsheb hydrogen. Platinum tsis tshua muaj thiab kim heev
Vim li cas cov tsheb hydrogen tsis tsim nyog? Rau ob qho laj thawj tseem ceeb: cov chaw ntim khoom rau cov roj no tseem tsis tau nrov heev, thiab hauv qee lub tebchaws tsis muaj ib yam dabtsi li. Tsis tas li ntawd, roj hlwb xav tau kev siv platinum, uas yog ib qho khoom kim heev thiab tsis tshua muaj, uas cuam tshuam rau tus nqi kawg ntawm FCEV tsheb. Yog li ntawd, cov kws tshawb fawb twb tau ua haujlwm los hloov platinum nrog cobalt.
Cobalt tuaj yeem ua rau cov tsheb hydrogen nrov
Cov txheej txheem
- Cobalt tuaj yeem ua rau cov tsheb hydrogen nrov
- Kev tshawb fawb cobalt pab roj hlwb feem ntau
Cobalt yog ib qho khoom siv tshwj xeeb. Nws yog siv rau hauv roj desulfurization hauv cov roj crude refining (yog, yog, Cov tsheb combustion kuj xav tau cobalt tsav.), nws kuj yog siv hauv hluav taws xob engineering - thiab hauv ntau daim ntawv thov roj teeb - hauv cathodes ntawm lithium-ion hlwb. Qhov no tuaj yeem pab hydrogen roj cell tsheb (FCEVs) yav tom ntej.
Raws li tus thawj coj ntawm pab pawg BMW R&D, Klaus Fröhlich, tau hais tias thaum ntxov 2020, cov tsheb hydrogen tsis pom nyob qhov twg, vim tias cov roj hluav taws xob muaj 10 npaug ntau dua li hluav taws xob tsav. Feem ntau ntawm cov nqi (50 feem pua ntawm cov nqi ntawm tes) yog los ntawm kev siv cov platinum electrodes, uas ua raws li catalysts hauv roj hlwb, ua kom cov tshuaj tiv thaiv hydrogen nrog oxygen.
Cov kws tshawb fawb ntawm Pacific Northwest National Laboratory txiav txim siab los hloov platinum electrodes nrog cobaltnyob rau hauv uas hlau atoms interspersed nrog nitrogen thiab carbon atoms. Xws li ib tug qauv, uas cobalt yog tuav nyob rau hauv tshwj xeeb npaj cov qauv organic, yuav tsum yog plaub npaug zog tshaj ib tug ua los ntawm hlau (qhov chaw). Thaum kawg, nws tseem yuav tsum pheej yig dua platinum; ntawm kev sib pauv, tus nqi ntawm cobalt yog kwv yees li 1 npaug qis dua tus nqi ntawm platinum.
Kev tshawb fawb cobalt pab roj hlwb feem ntau
Nws muab tawm hais tias lub reactivity ntawm xws li ib tug nruab nrab yog zoo dua li ntawm lwm yam catalysts ua tsis muaj platinum los yog hlau. Nws kuj tseem tuaj yeem pom tias hydrogen peroxide (H2O2) tsim thaum oxidation ua rau decomposition thiab txo qis hauv catalyst efficiency. Qhov no tso cai rau kev tiv thaiv cov electrodes thiab ua kom lub zog ntawm cov qauv, uas tuaj yeem txuas ntxiv lub neej ntawm cov hlwb yav tom ntej.
Lub neej tam sim no ntawm platinum-raws li roj cell kwv yees li ntawm 6-8 txhiab teev nrog kev ua haujlwm tsis tu ncua ntawm cov tshuab, uas muab txog 333 hnub ntawm kev ua haujlwm tsis tu ncua lossis mus txog rau 11 xyoo, yuav tsum tau ua 2 teev ib hnub twg... Cells feem ntau cuam tshuam los ntawm qhov sib txawv ntawm qhov sib txawv thiab cov txheej txheem kev ua haujlwm cuam tshuam nrog kev tsis ua haujlwm, uas yog vim li cas qee tus kws tshaj lij tau hais meej tias lawv yuav tsum tsis txhob siv hauv tsheb.
Hloov tshiab 2020/12/31, teev. 16.06: tus thawj version ntawm cov ntawv nyeem hais tias "platinum membranes". Qhov no yog ib qho yuam kev. Qhov saum npoo ntawm yam tsawg kawg yog ib qho ntawm cov electrodes yog platinum. Daim duab no qhia meej meej tias cov txheej txheem platinum catalyst nyob hauv qab lub diaphragm. Peb thov txim rau qhov tsis muaj concentration thaum kho cov ntawv nyeem.
Qhib cov duab: duab, roj cell (c) Bosch / Powercell
Qhov no yuav txaus siab rau koj:
