Cov kws tshawb fawb tsis ntev los no tau tshaj tawm qhov tseem ceeb ntawm kev txhim kho ntawm platinum-hloov catalyst rau roj hlwb. Hydrogen-powered tsheb uas siv Proton Exchange Membrane Roj Cells (PEMFC) hnyav hnyav rau platinum catalysts rau cov tshuaj tiv thaiv electrode.
Tshwj xeeb, cov tshuaj tiv thaiv electrochemical ntawm cov roj cell cathode tau pom tias yuav tsum tau qeeb, yuav tsum muaj ntau ntawm platinum catalyst los txhim kho cov tshuaj tiv thaiv.
Pab neeg tshawb nrhiav kev sib koom tes tau ua tiav ib qho tshiab "ib-atom hlau-nitrogen-carbon-phosphorus khoom" rau cov cathode, uas tuaj yeem hloov platinum, thiab lawv tau txheeb xyuas nws cov txheej txheem ua haujlwm.
Dab tsi ua rau qhov no tshwj xeeb tshaj yog qhov tseem ceeb yog nws qhov kev siv tau tsis yog rau kev lag luam PEMFCs nkaus xwb tab sis kuj rau lwm tiam Anion Exchange Membrane Roj Cells (AEMFC).
Cov khoom tsim tawm tshiab muaj cov kab ntawm cov hlau atoms tawg nyob rau hauv cov pa roj carbon matrix, nrog nitrogen thiab phosphorus bonding nyob ib ncig ntawm lawv.
Cov kws tshaj lij piav qhia tias los ntawm kev sib koom ua ke ntawm phosphorus rau hauv cov haujlwm tseem ceeb ntawm ib leeg-atom hlau-nitrogen-carbon catalyst, lawv tau ua tiav cov kev txwv thiab txhim kho kev ua haujlwm.
Roj hlwb yog cov tshuaj tiv thaiv kab mob nyuaj, ua rau nws nyuaj rau siv cov catalysts tsim tshiab rau cov roj hlwb siv tau. Txawm li cas los xij, qhov catalyst no tau ua tiav rau ob qho tib si PEMFCs thiab AEMFCs, ua tiav kev ua haujlwm tseem ceeb.
