Hiki i ka Cobalt ke mālama i nā kaʻa hydrogen. He kakaikahi a pipiʻi ka Platinum

No ke aha i ʻae ʻole ʻia ai nā kaʻa hydrogen? No nā kumu nui ʻelua: ʻaʻole kaulana loa nā kahua hoʻopihapiha no kēia kinoea, a ma kekahi mau aina aole loa. Eia kekahi, pono nā pūla wahie i ka hoʻohana ʻana i ka platinum, kahi mea kūʻai nui a paʻakikī, e pili ana i ke kumukūʻai hope o nā kaʻa FCEV. No laila, ke hana nei nā ʻepekema i ka hoʻololi ʻana i ka platinum me ka cobalt.

Hiki i ka Cobalt ke kaulana i nā kaʻa hydrogen

Ka papa o nā mea

• Hiki i ka Cobalt ke kaulana i nā kaʻa hydrogen
  • ʻO ka noiʻi Cobalt ke kōkua nei i nā wahie ma ka laulā

ʻO Cobalt kahi mea me nā waiwai kūʻokoʻa. Hoʻohana ʻia ia i ka wahie desulfurization i ka ʻaila hoʻomaʻemaʻe (ʻae, ʻae, Pono pū nā kaʻa puhi ahi i ka cobalt e hoʻokele.), hoʻohana pū ʻia ia i ka ʻenekini uila - a i nā mea uila he nui - i nā cathodes o nā cell lithium-ion. I ka wā e hiki mai ana, hiki i kēia ke kōkua i nā kaʻa kaʻa wahie hydrogen (FCEVs).

E like me ke poʻo o ka hui BMW R&D, ʻo Klaus Fröhlich, i ʻōlelo ʻia i ka hoʻomaka ʻana o 2020, ʻaʻohe wahi e ʻike ʻia ai nā kaʻa hydrogen, no ka mea, ʻoi aku ka nui o ke kumukūʻai o nā wahie ma mua o kahi kaʻa uila. ʻO ka hapa nui o ke kumukūʻai (10 ka nui o ke kumukūʻai o ke kelepona) mai ka hoʻohana ʻana i nā electrodes platinum, e hana ana ma ke ʻano he catalysts i loko o nā wahie, accelerating ka hopena o ka hydrogen me ka oxygen.

Nā kānaka ʻepekema ma ka Pacific Northwest National Laboratory ua hoʻoholo e hoʻololi i nā electrodes platinum me ka cobaltkahi i hoʻopili ʻia ai nā ʻātoma metala me nā ʻātoma naikokene a me ka carbon. ʻO kēlā ʻano hale, kahi e mālama ʻia ai ka cobalt i nā hale kūlohelohe i hoʻomākaukau ʻia, pono e ʻehā mau ʻoi aku ka ikaika ma mua o ka mea i hana ʻia mai ka hao (puna). ʻO ka hope loa, ʻoi aku ka liʻiliʻi ma mua o ka platinum; ma nā hoʻololi, ʻo ke kumukūʻai o ka cobalt ma kahi o 1 mau manawa haʻahaʻa ma mua o ke kumu kūʻai o ka platinum.

ʻO ka noiʻi Cobalt ke kōkua nei i nā wahie ma ka laulā

Ua ʻoi aku ka maikaʻi o ka reactivity o ia mea ma mua o nā catalysts i kūkulu ʻia me ka ʻole o ka platinum a i ʻole ka hao. Hiki ke ʻike i ka hydrogen peroxide (H2O2) i hana ʻia i ka wā o ka oxidation ke kumu o ka decomposition a me ka emi ʻana o ka hana catalyst. Ua ʻae kēia i ka pale ʻana i nā electrodes a me ka hoʻonui ʻana i ka ikaika o ka hale, hiki ke hoʻonui i ke ola o nā cell i ka wā e hiki mai ana.

ʻO ke ola o kēia manawa o kahi pahu wahie ma muli o ka platinum manaʻo ʻia ma kahi o 6-8 tausani mau hola me ka hana mau ʻole o nā ʻōnaehana, e hāʻawi ana i 333 mau lā o ka hana mau a i ʻole. a hiki i 11 mau makahiki, e pili ana i ka hana no 2 mau hola i ka lā... Hoʻopilikia nui ʻia nā kelepona e nā ukana ʻokoʻa a me nā kaʻina hana e pili ana me ka nele o ka hana, ʻo ia ke kumu i ʻōlelo maopopo ai kekahi poʻe akamai ʻaʻole pono e hoʻohana ʻia i nā kaʻa.

Hoʻohou 2020/12/31, nānā. 16.06/XNUMX: ʻO ka mana mua o ka kikokikona i ʻōlelo ʻia "platinum membranes". He kuhihewa maopopo keia. ʻO ka ili o ka liʻiliʻi o hoʻokahi o nā electrodes he platinum. Hōʻike maopopo kēia kiʻi i ka papa platinum catalyst ma lalo o ka diaphragm. E kala mai mākou no ka nele o ka noʻonoʻo ʻana i ka wā e hoʻoponopono ai i ka kikokikona.

Kiʻi wehe: kiʻi kiʻi, pahu wahie (c) Bosch / Powercell

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