本文選題：電化學(xué) + 擬合��； 參考：《東北師范大學(xué)》2017年碩士論文

【摘要】：電化學(xué)是研究?jī)深悓?dǎo)體形成的帶電界面及其上所發(fā)生的變化的科學(xué)。如今已形成了合成電化學(xué)、量子電化學(xué)、半導(dǎo)體電化學(xué)、有機(jī)導(dǎo)體電化學(xué)、光譜電化學(xué)、生物電化學(xué)等多個(gè)分支。電化學(xué)在化工、航空、航天、輕工、儀表、冶金、機(jī)械、電子、醫(yī)學(xué)、材料、能源、金屬腐蝕與防護(hù)、環(huán)境科學(xué)等科技領(lǐng)域獲得了廣泛的應(yīng)用。當(dāng)前世界上十分關(guān)注的研究課題,如能源、材料、環(huán)境保護(hù)、生命科學(xué)等等都與電化學(xué)以各種各樣的方式關(guān)聯(lián)在一起。循環(huán)伏安法是一種常用的電化學(xué)研究方法。該法控制電極電勢(shì)以不同的速率,隨時(shí)間以三角波形一次或多次反復(fù)掃描,使的電極上能交替發(fā)生不同的還原和氧化反應(yīng),并記錄電流-電勢(shì)曲線。根據(jù)曲線形狀可以判斷電極反應(yīng)的可逆程度,中間體、相界吸附或新相形成的可能性,以及偶聯(lián)化學(xué)反應(yīng)的性質(zhì)等。常用來(lái)測(cè)量電極反應(yīng)參數(shù),判斷其控制步驟和反應(yīng)機(jī)理,并觀察整個(gè)電勢(shì)掃描范圍內(nèi)可發(fā)生哪些反應(yīng)及其性質(zhì)如何。對(duì)于一個(gè)新的電化學(xué)體系,首選的研究方法往往就是循環(huán)伏安法,稱之為“電化學(xué)的譜圖”。本文在電化學(xué)循環(huán)伏安法測(cè)得的數(shù)據(jù)進(jìn)行尋峰工作過(guò)程中,提出了一種采用基于最小二乘算法擬合實(shí)驗(yàn)數(shù)據(jù)來(lái)確定基線及峰高的方法。通過(guò)分析數(shù)據(jù)特征結(jié)合分部分?jǐn)M合測(cè)試,確定出以高斯函數(shù)與三次函數(shù)的復(fù)合函數(shù)對(duì)實(shí)驗(yàn)數(shù)據(jù)I-E(電流-電勢(shì))進(jìn)行擬合的方法。根據(jù)使用LM算法擬合結(jié)果得到的多項(xiàng)式部分確定基線并進(jìn)一步確定峰高。用該方法對(duì)伏安法得到的單峰數(shù)據(jù)進(jìn)行處理,結(jié)果良好,并最終應(yīng)用于電化學(xué)工作站的開(kāi)發(fā)之中。
[Abstract]:Electrochemistry is the science of studying the charged interface formed by two kinds of conductors and the changes on them. At present, synthetic electrochemistry, quantum electrochemistry, semiconductor electrochemistry, organic conductor electrochemistry, spectroelectrochemistry, biochemistry and many other branches have been formed. Electrochemistry has been widely used in chemical, aerospace, light industry, instrumentation, metallurgy, machinery, electronics, medicine, materials, energy, metal corrosion and protection, environmental science and other fields. The current research topics, such as energy, materials, environmental protection, life sciences and so on, are closely related to electrochemistry in various ways. Cyclic voltammetry is a common electrochemical method. By controlling the electrode potential at different rates and scanning with triangular waveform once or more over time, different reduction and oxidation reactions occur alternately on the electrode, and the current-potential curves are recorded. According to the curve shape, the reversible degree of electrode reaction, the intermediate, the possibility of phase boundary adsorption or the formation of new phase, and the properties of coupling reaction can be judged. It is often used to measure the electrode reaction parameters, determine the control steps and reaction mechanism, and observe which reactions and their properties can occur in the whole range of potential scanning. For a new electrochemical system, the preferred method is cyclic voltammetry, which is called "electrochemical spectrogram". In this paper, a method based on the least square algorithm to fit the experimental data to determine the baseline and peak height is proposed in the course of peak searching from the data measured by electrochemical cyclic voltammetry. By analyzing the characteristics of the experimental data and combining the partial fitting test, the method of fitting the experimental data I-E (current-potential) with the compound function of Gao Si function and cubic function is determined. The base line is determined and the peak height is further determined according to the polynomial part obtained by the fitting result of LM algorithm. The single peak data obtained by voltammetry are processed by this method, and the results are satisfactory. Finally, the method is applied to the development of electrochemical workstation.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O646

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本文編號(hào)：2052333