發(fā)布時(shí)間：2018-01-05 21:14

  本文關(guān)鍵詞：稀土Ce摻雜納米晶Mn-Mo-Ce氧化物陽極及其選擇電催化性能　出處：《材料工程》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： Mn-Mo-Ce氧化物 稀土摻雜 陽極電沉積 選擇電催化

【摘要】：采用陽極電沉積技術(shù)制備納米晶Mn-Mo-Ce氧化物陽極,利用SEM,EDS,XRD,HRTEM,電化學(xué)等檢測技術(shù)及析氧效率測試方法研究氧化物陽極的納米結(jié)構(gòu)和選擇電催化性能,探討析氧抑氯選擇電催化的機(jī)理。結(jié)果表明:少量Ce摻雜獲得了具有網(wǎng)孔狀納米結(jié)構(gòu)的Mn-Mo-Ce氧化物陽極,該陽極在海水中具有99.51%析氧效率的高效選擇電催化性能。由于γ-MnO2結(jié)構(gòu)特性優(yōu)先吸附OH-,抑制Cl-吸附,OH-在Mn4+/Mn3+變價(jià)電催化作用下完成析氧,實(shí)現(xiàn)選擇電催化過程;Ce摻雜增加反應(yīng)活性,促進(jìn)吸附與放電過程;活性(100)晶面的晶面間距增大促進(jìn)OH-的流動(dòng)和新生O2的逸出,從納米形貌效應(yīng)上實(shí)現(xiàn)高效析氧抑氯選擇電催化性能。
[Abstract]:Nanocrystalline Mn-Mo-Ce oxide anode was prepared by anodic electrodeposition technique. Electrochemical techniques and oxygen evolution efficiency measurements were used to study the nanostructures and selective electrocatalytic properties of oxide anodes. The mechanism of selective electrocatalysis for oxygen evolution and chlorine suppression was discussed. The results showed that the Mn-Mo-Ce oxide anode with mesh-like nano-structure was obtained by a small amount of ce doping. The anode has a high selective electrocatalysis performance of 99.51% oxygen evolution efficiency in seawater. Because of the structure characteristic of 緯 -MnO2, the adsorption of OH-is preferred and Cl-adsorption is inhibited. Under the action of Mn4 / Mn3 variable valence electrocatalysis, OH- completes the oxygen evolution and realizes the selective electrocatalytic process. Ce doping increases the reaction activity and promotes the adsorption and discharge process. The increase of the interfacial spacing between the two surfaces promotes the flow of OH- and the escape of new O _ 2, and the selective electrocatalytic activity of oxygen evolution and chlorine suppression is realized from the effect of nano-morphology.
【作者單位】： 遼寧石油化工大學(xué)機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(21171083) 遼寧省教育廳一般項(xiàng)目資助項(xiàng)目(L2013154)
【分類號(hào)】：O646.542;TB383.1
【正文快照】： 電解海水氫能開發(fā)應(yīng)用中,最理想的析氧抑氯陽極材料是過渡族元素Mn的二元或三元復(fù)合氧化物,其中以陽極沉積制備的γ-MnO2物相結(jié)構(gòu)Mn-Mo氧化物及其基礎(chǔ)上開發(fā)的Mn-Mo-Fe,Mn-Mo-V等氧化物最為成熟,在堿性海水介質(zhì)中具有95%以上析氧的高效選擇電催化性能[1-3]。Mn系氧化物由于其，

本文編號(hào)：1384853