本文選題：電解水　切入點(diǎn)：NiMoO_4　出處：《山東大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：當(dāng)今世界,人類面臨空前增加的能源需求,同時,尋找更加清潔的能源也是人們所關(guān)注的話題。人們致力于尋找儲量豐富、廉價的能源,從而減小對化石資源的依賴。電解水制備氫氣是滿足全球能源需要以及環(huán)境友好的一種方式。原因是氫氣作為清潔可再生的能源,被認(rèn)為是替代化石能源的最具潛力的新能源。目前制備氫氣的方式眾多,而電解水制備氫氣的方法是大規(guī)模制備氫氣的主要途徑。在電解水制備氫氣的過程中,高效的電極材料至關(guān)重要。因此制備電催化活性好、過電勢低的電極材料是人們目前主要的工作。雖然Pt、Pd等貴金屬在電催化析氫反應(yīng)中有較低的過電勢,但是因為貴金屬的豐度低、成本高,限制了其大規(guī)模使用,因此,研究電催化活性高的非貴金屬至關(guān)重要。近年來,過渡金屬氧化物、碳化物、硫化物以及硒化物引起了人們的廣泛關(guān)注。本論文利用水熱法制備NiMoO_4納米線陣列和Ni_(0.85)Se/MoSe_2復(fù)合材料,并研究其微觀形貌和電催化析氫性能,本論文的研究內(nèi)容主要包括以下兩個部分。1:采用水熱合成法在泡沫鎳上生長一維徑向的NiMoO_4納米線陣列,電化學(xué)測試結(jié)果表明NiMoO_4納米線陣列的電催化析氫活性與泡沫鎳基底相比,有較明顯的提高。在堿性電解質(zhì)溶液中,要達(dá)到j(luò)=10mA/cm~2的要求,NiMoO_4納米線陣列的過電勢僅為216 mV,而泡沫鎳基底則需要267 mV的過電勢才能達(dá)到同樣的電流密度,電勢差為51 mV。而塔菲爾曲線的斜率也差別較大,在相同條件下,NiMoO_4納米線陣列和泡沫鎳基底的tafel斜率分別為109.74 mV dec~(-1)和155.82 mV dec~(-1)。2:采用水熱法將NiMoO_4納米線陣列硒化,制備Ni_(0.85)Se/MoSe_2納米復(fù)合材料,研究其電催化活性。由于電解水制備氫氣的過程中需要多步驟的結(jié)合,包括吸附、電化學(xué)脫附和復(fù)合脫附三步驟,使得單組分具有電化學(xué)活性的電極材料在電化學(xué)產(chǎn)氫的過程中的活性受到了限制,因此我們制備Ni_(0.85)Se/MoSe_2復(fù)合材料來提高催化劑的電化學(xué)活性。Ni_(0.85)Se/MoSe_2復(fù)合材料的起始過電勢為21 mV,而NiMoO_4納米線陣列的起始過電勢為106 mV,過電勢差近5倍。塔菲爾斜率為83.74 mV dec~(-1),比NiMoO_4納米線陣列的塔菲爾斜率109.74 mV dec~(-1)低很多,顯示了很高的電化學(xué)活性,并且電極材料表現(xiàn)出很好的穩(wěn)定性。本工作為電解水制氫電極材料的研究提供了 一種新思路。
[Abstract]:In today's world, mankind is facing an unprecedented increase in energy demand, at the same time, looking for more clean energy is also a topic of concern. People looking for abundant, cheap energy, thereby reducing dependence on fossil resources. Water electrolysis hydrogen preparation is a way to meet the global needs source and friendly environment. Hydrogen as a clean and renewable energy, is considered to be an alternative to fossil energy new energy potential. At present many hydrogen preparation method, and method of water electrolysis hydrogen preparation is the main way for the large-scale production of hydrogen. The size in the process of water electrolysis hydrogen preparation, important efficient electrode material. So the preparation of electro catalytic activity, a low potential electrode material is the most important work. Although Pt, Pd and other precious metals have low overpotential in electrocatalytic hydrogen evolution reaction, but because of your gold Genus of low abundance, high cost, limited its large-scale use, therefore, it is important to study the high electrocatalytic activity of non noble metals. In recent years, transition metal oxides, carbides, sulfides and selenides has attracted widespread attention. The preparation of NiMoO_4 nanowire arrays and Ni_ by hydrothermal method (0.85) Se/MoSe_2 composite materials, and to study its morphology and electrocatalytic hydrogen evolution, the main content of this thesis include the following two parts of NiMoO_4 nanowires.1: by hydrothermal method and one-dimensional radial growth on nickel foam array, electrochemical test results show that compared to the electro catalytic activity of hydrogen evolution and foam nickel substrate of NiMoO_4 nanowires the array, are obviously improved. In alkaline electrolyte solution, to achieve the requirements of the j=10mA/cm~2, the overpotential of NiMoO_4 nanowire arrays is 216 mV, while the nickel foam is required over 267 power base mV In order to achieve the same potential current density, potential is 51 mV. and the slope of the Tafel curve is also quite different, under the same conditions, the slope of Tafel NiMoO_4 nanowire arrays and nickel foam substrate were 109.74 mV and 155.82 mV dec~ (-1) dec~ (-1).2: by hydrothermal method NiMoO_4 selenide nanowire arrays preparation, Ni_ (0.85) Se/MoSe_2 nano composite material, study its electrocatalytic activity. Due to the combination, need to process water electrolysis hydrogen preparation including the adsorption, desorption and desorption electrochemical composite three steps, the single component with active electrode materials of electrochemical activity in the process of electrochemical hydrogen production in is limited, so we prepared Ni_ (0.85) Se/MoSe_2 composite materials to improve the electrochemical activity of.Ni_ catalyst (0.85) initial Se/MoSe_2 composite potential is 21 mV, while the initial column of the NiMoO_4 nanowire arrays have the potential for 1 06 mV, a potential difference of nearly 5 times. Tafel slope is 83.74 mV dec~ (-1), than the Tafel slope of NiMoO_4 nanowire arrays of 109.74 mV dec~ (-1) is much lower, showed high electrochemical activity, and electrode materials show good stability. This work provides a new way for the research of the electrolytic water making hydrogen electrode material.

【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O643.36;TQ116.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 曹寅亮;李志林;王峰;劉景軍;吉靜;王建軍;張良虎;覃事永;;鎳錫析氫活性陰極的電化學(xué)制備及其在堿性溶液中的電催化機(jī)理[J];物理化學(xué)學(xué)報;2013年07期

2 袁文輝;劉曉晨;李莉;;Co摻雜提高ZnIn_2S_4光催化劑可見光下的產(chǎn)氫性能(英文)[J];物理化學(xué)學(xué)報;2013年01期

3 劉少文,吳廣義;制氫技術(shù)現(xiàn)狀及展望[J];貴州化工;2003年05期

4 閆躍龍,肖云漢,田文棟,王峰;含碳能源直接制氫的熱力學(xué)分析與實(shí)驗研究[J];工程熱物理學(xué)報;2003年05期

相關(guān)碩士學(xué)位論文 前3條

1 徐超;堿性電解水析氫電極研究[D];湖南大學(xué);2011年

2 鄧炎平;納米多孔金電極的制備及應(yīng)用[D];湖南師范大學(xué);2008年

3 牛嬌;制氫技術(shù)的系統(tǒng)評價體系研究[D];北京化工大學(xué);2007年

，

本文編號：1636143