Mpweya wa melamine wa carbonized, womwe unayambitsidwa ndi gulu lotsogozedwa ndi Jaephil Cho ku Ulsan National Institute of Science and Technology (Korea), buku lothandizira kwambiri la electrocatalyst lochepetsera mpweya m'maselo amafuta ndi mabatire, limapereka yankho lomwe lingathe kuchepetsa ndalamazo koma limapereka mabatire apamwamba kwambiri achitsulo-mpweya ndi mafuta.
Gulu la asayansi aku Korea ndi America tsopano layambitsa zinthu zatsopano zopangira ma electrode kutengera thovu la melamine lotsika mtengo komanso kaboni wakuda. Kuchuluka kwa porosity kumathandiza kwambiri kunyamula katundu mwachangu ndipo malo ambiri ogwira ntchito mothandizana ndi ma catalytical amawonjezera kwambiri ntchito yochepetsa mpweya wa ma cathode a ma cell amafuta ndi mabatire achitsulo ndi mpweya.
Zomwe zimachitika pama cathodes amafuta amafuta ndi mabatire achitsulo-mpweya ndi kuchepetsedwa kwa mpweya wa electrochemical, ndiko kuti oxygen reduction reaction (ORR). Izi zimalephereka kwambiri chifukwa cha ulesi, komanso magwiridwe antchito a ma cell ndi ochepa kuposa momwe angakhalire.
Catalytic cathode iyenera kuwonetsetsa kuti mpweya umayenda ndi madzi, kutenga ma elekitironi kuti apange ma OH-ion mu njira ya alkaline. Vuto ndilakuti m'makina ovuta kwambiri okhudzana ndi zolimba, zamadzimadzi, ndi mpweya, njira zoyendera nthawi zambiri zimachedwa kwambiri ndipo zimalepheretsa njirayi, makamaka ikatulutsa ndi kachulukidwe kakang'ono kapano.
Ma cathodes opangidwa ndi porous carbon support (carbon black) pomwe chitsulo chogwira ntchito kwambiri ngati platinamu chimabalalitsidwa bwino amatha kuchepetsa kutsekeka kwa kinetic uku. Komabe, ndi okwera mtengo komanso osakhazikika kwambiri, motero amawapangitsa kuti asagwiritsidwe ntchito pofalikira.
Gulu lotsogozedwa ndi Jaephil Cho ku Ulsan National Institute of Science and Technology (Korea) ndi Meilin Liu ku Georgia Institute of Technology (USA) motero cholinga chake chinali kupanga njira ina yachuma.
Iwo anauziridwa ndi kamangidwe ka tetrapod (Greek tetra: zinayi, podes: mapazi) a breakwaters synthesis watsopano kwambiri imayenera electrocatalyst. Matetrapods, omwe “mapazi” awo anayi alozedwera ku ngodya za tetrahedron yoyerekezedwa, amamangidwa m’mphepete mwa nyanja limodzinso ndi pafupi ndi madamu ndi mapilo kuti achepetse mphamvu ya mafunde akugunda pagombe. Nyumbazi zimaperekanso malo osungiramo zamoyo zam'madzi m'mabowo awo ambiri. Chithovu cha melamine chikapangidwa ndi pyrolyzed ndikugwetsedwa ndi matope ndi pestle, chimapanga tizidutswa tating'ono towoneka ngati ma tetrapods.
Asayansi anachiritsa thovu la melamine ndi iron chloride ndi nitrogen-doped ketjenblack (yochititsa ma pellets a carbon black). Iwo adatulutsa mpweya wa mankhwalawa ndikuchichotsa ndi sulfuric acid. Ma nanotetrapods opangidwa ndi nanoparticles wakuda wa kaboni amakhala ndi malo okwera kwambiri, malo ochulukirapo ambiri (Fe/Fe).3C, ndi magulu a CN), ndi ma pores ambiri omwe amalola kunyamula anthu mwachangu. Ma cathodes opangidwa ndi ma electrode atsopanowa ndi olimba kwambiri komanso ochita bwino kwambiri, ofanana ndi a cathodes opangidwa ndi zitsulo - pamtengo wotsika kwambiri. Izi zitha kukhala malo abwino oyambira m'badwo watsopano wa mabatire achitsulo okwera mtengo komanso amphamvu kwambiri komanso ma cell amafuta.
SINOYQX ikuthandiza mabungwe ndi mayunivesite ena ku China pakupanga thovu la melamine kuti lichepetse mpweya m'maselo amafuta ndi mabatire.
Zina zatchulidwa kuchokera ku http://www.chemistryviews.org/details/ezine/4153391/Inspired_by_a_Breakwater.html