Carbonized melamine foam, yakaunzwa nechikwata chinotungamirwa naJaephil Cho kuUlsan National Institute of Science neTekinoroji (Korea), riwaya rinoshanda zvakanyanya electrocatalyst yekudzikisa okisijeni mumaseru emafuta nemabhatiri, inopa mhinduro inogoneka kudzikisa mutengo asi inopa inoshanda kwazvo simbi-mhepo mabhatiri uye masero emafuta.
Chikwata chemasayendisiti ekuKorea neAmerica chave kuunza zvinhu zvitsva zvemaelectrode zvichibva pafoam yemelamine inodhura uye carbon black. Kukura kwakanyanya kunoita kuti kutakurwa kwemasero kufambiswe nekukurumidza uye huwandu hwakawanda hwenzvimbo dzinoshanda zvakanyanya hunowedzera zvakanyanya basa rekuderedza okisijeni rema cathodes ema fuel cells nemabhatiri esimbi-mhepo.
Mhedzisiro inoitika pamakathodhi emafuta masero uye simbi-yemhepo mabhatiri ndiko kuderedzwa kwe electrochemical yeokisijeni, kureva iyo oxygen yekuderedza reaction (ORR). Kuita uku kunodzivirirwa zvakanyanya nekuda kwehusimbe hwayo, uye kushanda kwemasero kwakadzikira kupfuura zvazvingave.
Iyo catalytic cathode inofanirwa kuona kuti okisijeni inopindirana nemvura, ichitora maerekitironi kuita maOH-ions mumushonga wealkaline. Dambudziko nderekuti mune yakaoma sisitimu inosanganisira yakasimba, yemvura, uye gasi reactants, nzira dzekufambisa dzinowanzo kunonoka uye dzinotadzisa maitiro, kunyanya kana ichiburitsa neakakwira density iripo.
Macathodes akagadzirwa neporous carbon support (carbon dema) pairi simbi inoita seplatinum yakaparadzirwa zvakatsetseka inogona kunyatso dzikisa iyi kinetic inhibition. Nekudaro, iwo anodhura uye haana kugadzikana zvakanyanya, nekudaro anoita kuti asashande kune yakapararira kushandiswa.
Chikwata chinotungamirwa naJaephil Cho kuUlsan National Institute of Science and Technology (Korea) naMeilin Liu kuGeorgia Institute of Technology (USA) nokudaro vakavavarira kugadzira imwe nzira ine hupfumi.
Ivo vakafemerwa neiyo tetrapod chimiro (Tetra yechiGiriki: ina, podes: tsoka) yemvura inoputika kuti igadzirise itsva inonyatso shanda electrocatalyst. Matetrapod, ane “tsoka” ina dzakanangidzirwa kumakona e<em>tetrahedron yokufungidzira, anovakwa pamhenderekedzo yegungwa uyewo pedyo namadhamu nepiko kuderedza simba remasaisai anorovera pamhenderekedzo. Zvivakwa izvi zvinopawo nzvimbo tsvene yezvipenyu zvemugungwa mumakomba mahombe mazhinji. Kana furo remelamine raitwa pyrolyzed uye richigadzika nedhaka uye pestle, rinogadzira zvimedu zvisingaoneki zvakaita se tetrapods.
Masayendisiti akarapa melamine furo nesimbi chloride uye nitrogen-doped ketjenblack (inoitisa pellets kabhoni dema). Vakagadzira chigadzirwa ichi uye vakachibudisa ne sulfuric acid. Iwo anokonzeresa nanotetrapods akazadzwa nenanoparticles yekabhoni nhema ane yakanyanya kukwirira nzvimbo, nhamba huru yecatalytically active centers (Fe/Fe3C, uye CN mapoka), uye ma pores akawanda anobvumira kukurumidza kutakura kwevanhu vakawanda. Macathodes akagadzirwa neiyi itsva electrode material anogara akasimba uye akanakisa kuita, anofananidzwa neaya esimbi-based cathodes - pamutengo wakaderera zvakanyanya. Izvi zvinogona kumiririra nzvimbo inovimbisa zvikuru yekutanga yechizvarwa chitsva chemabhatiri emhepo-simbi uye masero emafuta asingadhure uye anoshanda zvakanyanya.
SINOYQX iri kutsigira mamwe masangano nemayunivhesiti muChina mukugadzira foam yemelamine kuti iite carbon dioxide mumasero emafuta nemabhatiri.
Zvimwe zvakatorwa kubva ku http://www.chemistryviews.org/details/ezine/4153391/Inspired_by_a_Breakwater.html