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[求助]
求問(wèn)BiVO4光解水產(chǎn)氫的問(wèn)題 已有1人參與
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小弟看文獻(xiàn)中,BiVO4價(jià)帶位置能夠產(chǎn)氧但是導(dǎo)帶位置不夠還原氫,因此PEC中是只能產(chǎn)氧的,但為什么很多關(guān)于這方面的報(bào)道BiVO4在0.6V RHE的偏壓下能夠分解水并產(chǎn)生氫氣氧氣?究竟是用三電極體系還是兩點(diǎn)極體系?那個(gè)0.6V究竟是vs counter還是RHE呢? 如何從光電流計(jì)算理論產(chǎn)氧量的從而計(jì)算法拉第效率? 剛剛?cè)腴T(mén),看了審稿人對(duì)我們組一個(gè)同事的文章的comment,提到 Text:“In order to confirm that the anodic photocurrent produced by electrode is the exclusive result of O2 evolution, O2 detection was carried out during photoelectrolysis of water under 0.6 V vs RHE bias using 100 mW/cm2 AM 1.5G filtered illumination.” For this test it should be specified that a 3-electrode system was used because BiVO4 has not been proven to split water since the conduction band is too positive. The counter electrode is likely pushed to a very negative potential by the CH Instruments 660D. It may be helpful to actually measure the counter electrode potential with an external voltmeter and report the value in the supporting information. 這句話是什么意思? 請(qǐng)電化學(xué)高手指點(diǎn)~感激 |
木蟲(chóng) (正式寫(xiě)手)
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