Inkqubela phambili kunye nohlalutyo lwezoqoqosho lwe-ion exchange membrane (AEM) hydroelectrolysis yokuvelisa i-hydrogen

I-AEM ngandlela ithile yi-hybrid ye-PEM kunye ne-diaphragm yendabuko esekelwe kwi-lye electrolysis. Umgaqo we-AEM electrolytic cell uboniswe kuMfanekiso 3. Kwi-cathode, amanzi ayancitshiswa ukuze avelise i-hydrogen kunye ne-OH -. OH - ehamba nge-diaphragm ukuya kwi-anode, apho iphinda ihlangane khona ukuze ivelise i-oxygen.

ULi et al. [1-2] bafunde i-polystyrene enee-quaternized kunye ne-polyphenylene AEM ephezulu esebenza kakuhle, kwaye iziphumo zibonise ukuba uxinano lwangoku yi-2.7A/cm2 kwi-85°C kwi-voltage ye-1.8V. Xa besebenzisa i-NiFe kunye ne-PtRu/C njengee-catalysts zokuvelisa i-hydrogen, uxinano lwangoku lwehla kakhulu lwaya kwi-906mA/cm2. UChen et al. [5] bafunde ukusetyenziswa kwe-catalyst ye-electrolytic yesinyithi esingenamsebenzi ophezulu kwi-electrolyzer yefilimu ye-alkaline polymer. Ii-oxide ze-NiMo zancitshiswa ziigesi ze-H2/NH3, NH3, H2 kunye ne-N2 kubushushu obahlukeneyo ukuze kuhlanganiswe ii-catalysts zokuvelisa i-hydrogen ze-electrolytic. Iziphumo zibonisa ukuba i-catalyst ye-NiMo-NH3/H2 ene-H2/NH3 yokunciphisa inokusebenza okungcono kakhulu, kunye noxinano lwangoku olufikelela kwi-1.0A/cm2 kunye nokusebenza kakuhle kokuguqulwa kwamandla kwe-75% kwi-1.57V kunye ne-80°C. I-Evonik Industries, ngokusekelwe kubuchwepheshe bayo bokwahlulwa kwerhasi obukhoyo, iphuhlise izinto zepolymer ezinelungelo elilodwa lomenzi ukuze zisetyenziswe kwiiseli ze-electrolytic ze-AEM kwaye okwangoku yandisa imveliso ye-membrane kumgca wovavanyo. Inyathelo elilandelayo kukuqinisekisa ukuthembeka kwenkqubo kunye nokuphucula iinkcukacha zebhetri, ngelixa inyusa imveliso.

Okwangoku, imingeni ephambili ejongene neeseli ze-electrolytic ze-AEM kukungabikho kokuqhuba okuphezulu kunye nokumelana ne-alkaline kwe-AEM, kwaye i-electrocatalyst yentsimbi exabisekileyo yonyusa iindleko zokwenza izixhobo ze-electrolytic. Kwangaxeshanye, i-CO2 engena kwifilimu yeseli iya kunciphisa ukumelana nefilimu kunye nokumelana ne-electrode, ngaloo ndlela inciphisa ukusebenza kwe-electrolytic. Isikhokelo sophuhliso lwexesha elizayo lwe-electrolyzer ye-AEM silandelayo: 1. Phuhlisa i-AEM ene-conductivity ephezulu, ukukhetha i-ion kunye nokuzinza kwe-alkaline yexesha elide. 2. Yoyisa ingxaki yexabiso eliphezulu le-catalyst yentsimbi exabisekileyo, phuhlisa i-catalyst ngaphandle kwesinyithi esixabisekileyo kunye nokusebenza okuphezulu. 3. Okwangoku, ixabiso elijolise kwi-electrolyzer ye-AEM yi-$20 /m2, ekufuneka incitshiswe ngezinto eziluhlaza ezingabizi kunye namanyathelo okwenziwa ancitshisiweyo, ukuze kuncitshiswe iindleko zizonke ze-electrolyzer ye-AEM. 4. Nciphisa umxholo we-CO2 kwiseli ye-electrolytic kwaye uphucule ukusebenza kwe-electrolytic.

[1] Liu L, Kohl P A. I-Anion eqhuba ii-copolymers ezininzi ezinee-cations ezahlukeneyo ezibotshelelweyo[J]. Ijenali yeSayensi yePolymer Icandelo A: I-Polymer Chemistry, 2018, 56(13): 1395 — 1403.

[2] Li D, Park EJ, Zhu W, et al. Ii-ionomers ze-polystyrene ezi-quaternized eziphezulu ze-anion exchange membrane water electrolysers ezisebenza kakuhle [J]. Nature Energy, 2020, 5: 378 — 385.