Electrochemical oxidation ntawm ethanol ntawm Pt-TiO2 / C electrode hauv acidic tov rau electroplated hluav taws xob cua sov raj

Electrochemical oxidation ntawm ethanol ntawm Pt-TiO2 / C electrode hauv acidic tov rau electroplated hluav taws xob cua sov raj

Linear scanning curves ntawm ethanol ntawm Pt / C thiab Pt-TiO2 / C electrodes hauv acidic daws.

Ethanol muaj ob lub ncov oxidation ntawm Pt/C electrode, nyob ntawm {{{0}}}.83 thiab 1.25 V raws, nrog rau cov ncov tam sim no ntawm 38.2 thiab 52.5 mA · cm{8}}, feem. Ntawm Pt Ti02 / C electrode, oxidation ncov muaj peev xwm yog 0.73 thiab 1.13 V, raws li, thiab cov khoom siv ncov yog 38.7 thiab 52.2 mA · Ccm, raws li_ 2. Nws tuaj yeem pom tau tias oxidation ncov tam sim no ntom ntom ntawm ethanol ntawm Pt Ti02 / C electrode zoo ib yam li ntawm Pt / C electrode, tab sis lub ncov muaj peev xwm hloov tsis zoo los ntawm txog 100mvo.

Ntawm 60 degree, oxidation ncov muaj peev xwm ntawm ethanol ntawm Pt/C electrode yog li 1.04V, qhov pib oxidation muaj peev xwm yog li ntawm 0.39V, thiab cov ncov sib xws Tam sim no yog 80.7mA · cm_ Z. Ntawm Pt Ti02/C electrode, thawj oxidation ncov ntawm ethanol yog nyob ntawm 0.86V, nrog rau thawj oxidation peev xwm ntawm 0.29V. Lub ncov tam sim no ntawm thawj oxidation ncov yog 76.OmA · "cm-2, me ntsis qis dua lub ncov tam sim no ceev ntawm Pt/C electrode. Txawm li cas los xij, ob qho tib si oxidation ncov muaj peev xwm thiab thawj oxidation muaj peev xwm muaj qhov tseem ceeb. Kev hloov pauv tsis zoo, nrog lub peev xwm siab tshaj plaws ntawm 170mV thiab pib qhov peev xwm oxidation uas yuav tsum tau hloov pauv tsis zoo

100mv. Qhov kev hloov pauv tsis zoo yog ntau dua li ntawm 25 degree, qhia tias Ti0: muaj kev sib koom ua ke ntau dua ntawm ethanol electrooxidation cov tshuaj tiv thaiv ntawm 60 degree dua li ntawm 25 degree.

2.2 Oxidation ntawm Ethanol ntawm Pt-TiO2 / C Electrode hauv Neutral Solution

Hauv kev daws teeb meem nruab nrab, oxidation ncov tam sim no ntom ntom ntawm ethanol ntawm Pt-TiOZ / C electrode yog me ntsis siab dua li ntawm PVC electrode, nce li ntawm 4mA · cm_ Z. Lub peev xwm oxidation ncov ntawm ethanol ntawm Pt Ti02/C electrode yog 0.79V, uas yog qhov tsis zoo me ntsis piv rau oxidation ncov muaj peev xwm ntawm PVC electrode ntawm 0.80V. Piv nrog rau acidic daws nyob rau tib qhov kub thiab txias, oxidation ncov muaj peev xwm ntawm ethanol ntawm PVC electrode nyob rau hauv ib tug nruab nrab tov yog me ntsis tsis zoo, tab sis lub oxidation ncov lub peev xwm ntawm ethanol ntawm RTi02 / C electrode yog zoo dua nyob rau hauv ib tug acidic tov. oxidation ncov tam sim no ceev ntawm ethanol nyob rau hauv acidic tov nyob rau tib qhov kub thiab txias yog me ntsis siab dua li nyob rau hauv nruab nrab kua.

3 Kev xaus

Piv nrog Pt / C catalyst, Pt Ti02 / C catalyst nthuav tawm qee qhov kev hloov pauv tsis zoo hauv ob qho tib si oxidation ncov muaj peev xwm thiab pib oxidation peev xwm rau ethanol oxidation hauv acidic kua, qhia tias ethanol yog yooj yim oxidized ntawm Pt Ti02 / C catalyst. TiO2 muaj cov nyhuv catalytic tseem ceeb ntawm oxidation ntawm ethanol hauv cov kua qaub. Tsis muaj kev hloov pauv tseem ceeb hauv oxidation ncov muaj peev xwm thiab pib oxidation muaj peev xwm nyob rau hauv nruab nrab, tab sis oxidation ncov tam sim no ceev ntawm ethanol ntawm Pt Ti02 / C catalyst tau nce mus rau ib qho twg.

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