本文關(guān)鍵詞：用于電化學(xué)水氧化的鐵、鎳、鈷金屬及其二元金屬納米顆粒比較研究（英文）　出處：《電化學(xué)》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 鈷納米顆粒 電化學(xué)沉積 電催化劑 氧氣析出反應(yīng) 能量轉(zhuǎn)換

【摘要】：從環(huán)境兼容角度來設(shè)計應(yīng)用于氧析出反應(yīng)的電催化劑是否有效、耐用和廉價對能源轉(zhuǎn)化過程至關(guān)重要.本文報告了一種快速制備低成本、原料豐富的金屬催化劑制備方法.通過一步電化學(xué)沉積法在鈦金屬基材上制備了鐵、鎳、鈷金屬及其鈷鎳、鈷鐵二元金屬納米顆粒.采用場發(fā)射電子顯微鏡(FE-SEM)、能量散射X-射線能譜(EDX)、X-射線衍射光譜(XRD)、X-射線光電子能譜(XPS)和電化學(xué)技術(shù)對制備的不同納米顆粒進(jìn)行了表征.電化學(xué)結(jié)果顯示,在合成的五種鈦基金屬納米催化劑中,鈦基上沉積鈷金屬納米顆粒(Ti/Co)電極在0.l mol·L~(-1)氫氧化鉀溶液中氧析出反應(yīng)的電催化活性最好,0.70 V(相對于銀/氯化銀電極)的電流密度為10.0 mA·cm~(-2).經(jīng)優(yōu)化后Ti/Co電極的過電位(η)很小,當(dāng)電流密度為10.0 mA·cm~(-2)時η為0.43 V,質(zhì)量活性高達(dá)105.7 A·g~(-1),逆轉(zhuǎn)頻率(TOF)值為1.63×10~(-3) s~(-1),這些與當(dāng)前最好的碳載鉑(Pt/C)和氧化釕(RuO_2)電催化劑的性能相當(dāng).此外,通過計時電位技術(shù)對優(yōu)化后Ti/Co電極的耐久性進(jìn)行了測試,發(fā)現(xiàn)該電極在堿性溶液中氧析出反應(yīng)的穩(wěn)定性良好.本工作制備的鈦金屬基材上電化學(xué)沉積金屬鈷納米顆粒具有高催化活性、高穩(wěn)定性、原料來源豐富、廉價且易于大規(guī)模生產(chǎn),在工業(yè)化水分解領(lǐng)域具有潛在的應(yīng)用前景.
[Abstract]:It is very important for the energy conversion process to design the electrocatalysts for oxygen precipitation reaction from the point of view of environmental compatibility. In this paper, we report a rapid preparation with low cost. The preparation method of metal catalyst with abundant raw materials. Iron, nickel, cobalt metal and cobalt nickel were prepared on titanium metal substrate by one step electrochemical deposition method. Co-Fe binary metal nanoparticles. Field emission electron microscopy (FE-SEMN), energy dispersive X-ray spectroscopy (EDXX) and X-ray diffraction (XRD). X- ray photoelectron spectroscopy (XPS) and electrochemical techniques were used to characterize the prepared nanoparticles. The electrochemical results showed that there were five titanium based metal nanocatalysts. The Ti / Co electrode with cobalt metal nanoparticles deposited on titanium substrate has the best electrocatalytic activity for oxygen precipitation in 0.1 mol 路L ~ (-1) potassium hydroxide solution. The current density of 0.70V (relative to silver / silver chloride electrode) is 10.0 Ma 路cm ~ (-1) ~ (-2). The overpotential (畏) of optimized Ti/Co electrode is very small. When the current density is 10.0 Ma 路cm ~ (-2), 畏 is 0.43 V, and the mass activity is 105.7 A 路g ~ (-1)). The reversal frequency (TOF) value was 1.63 脳 10 ~ (-3) ~ (-1) 路s ~ (-1). The properties of these catalysts are comparable to those of the best carbon-supported Pt / C and ruthenium oxide Ruo _ 2) electrocatalysts. In addition, the durability of the optimized Ti/Co electrode was tested by chronopotentiometry. It is found that the electrode has good stability in the oxygen precipitation reaction in alkaline solution. The electrochemical deposition of cobalt nanoparticles on the titanium substrate prepared in this work has high catalytic activity, high stability and abundant raw materials. It is cheap and easy to be produced in large scale, so it has a potential application in the field of industrial water decomposition.
【作者單位】： 加拿大湖首大學(xué)化學(xué)系;
【基金】：supported by the Discovery Grant from the Natural Sciences and Engineering Research Council of Canada(NSERC RGPIN-2015-06248) the Canada Foundation for Innovation(CFI) for the Canada Research Chair Award in Materials and Environmental Chemistry
【分類號】：O643.36;TB383.1
【正文快照】： The development of a technology that has theconstrains the efficiency of water splitting devices[7-9].capacity to efficiently generate hydrogen from waterRobust and highly active electrocatalysts are thus re-would provide a new renewable,sustainable,andq

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