發(fā)布時(shí)間：2018-04-16 02:15

  本文選題：甲醇氧化 + Pt基催化劑��； 參考：《青島科技大學(xué)》2017年碩士論文

【摘要】：直接甲醇燃料電池(DMFC)作為一種便攜式電源,引起人們很大的研究興趣。但其陽極催化劑成本高,活性低限制了DMFC商業(yè)化。本文針對(duì)這些問題,在提高催化劑活性,降低催化劑成本方面進(jìn)行了以下幾方面研究。首先,采用微波法制備了Pt/CNTs、PtRu/CNTs,用于催化甲醇氧化反應(yīng)。研究發(fā)現(xiàn)在電極上Pt含量為12.75μg·cm-2,Nafion含量為55%時(shí),Pt/CNTs催化甲醇氧化的活性最高。甲醇在Pt/CNTs上的氧化受擴(kuò)散控制。PtRu催化劑的活性與粒徑關(guān)系不明顯,在Pt/Ru摩爾比為3/1時(shí),催化甲醇氧化活性最高。其次,采用微波法制備了PtM/CNTs(M=Co、Sn、Cu、Fe、Ni),其中PtSn/CNTs平均粒徑最小,催化甲醇氧化活性最高。分析發(fā)現(xiàn)PtSn/CNTs中Sn主要是以SnO2形式存在,少部分零價(jià)Sn與Pt形成合金。PtSn催化甲醇氧化的活性不僅與粒徑有關(guān),同時(shí)與Sn的存在形式有關(guān)。第三,采用抗壞血酸為還原劑制備PtPd/CNTs,由小粒子組成的PtPd納米顆粒均勻地負(fù)載在CNTs上,PtPd納米顆粒的平均粒徑為68 nm。PtPd納米顆粒具有合金相結(jié)構(gòu),Pt在顆粒表面富集。在催化劑制備過程中,NaOH、抗壞血酸和CTAB的加入量以及Pt/Pd摩爾比會(huì)影響催化劑的形貌。研究發(fā)現(xiàn)制備的PtPd/CNTs催化甲醇氧化的性能優(yōu)異。
[Abstract]:As a portable power supply, direct methanol fuel cell (DMFC) has attracted much attention.However, the high cost of anode catalyst and low activity limit the commercialization of DMFC.In order to solve these problems, the following aspects have been studied in improving catalyst activity and reducing catalyst cost.Firstly, a microwave method was used to prepare PT / CNTsO / PtRu- / CNTs for the catalytic oxidation of methanol.It was found that Pt / CNTs had the highest catalytic activity for methanol oxidation when Pt content was 12.75 渭 g / cm ~ (-2) and Nafion content was 55 on the electrode.The oxidation of methanol on Pt/CNTs was controlled by diffusion. The activity of PtRu catalyst was not related to the particle size. When the molar ratio of Pt/Ru was 3 / 1, the catalytic activity of methanol oxidation was the highest.Secondly, the PtM / CNTsCU CoSnSnCU FeFeNiN was prepared by microwave method, in which the average particle size of PtSn/CNTs was the smallest, and the catalytic activity of methanol oxidation was the highest.It is found that Sn in PtSn/CNTs mainly exists in the form of SnO2, and the catalytic activity of a small part of Sn and Pt in methanol oxidation is not only related to the particle size, but also to the existence form of Sn.Thirdly, PtPd / CNTswere prepared by ascorbic acid as reducing agent. The average particle size of PtPd nanoparticles loaded on CNTs was 68 nm.PtPd nanoparticles with alloy phase structure and Pt enriched on the surface of CNTs.The amount of ascorbic acid and CTAB and the molar ratio of Pt/Pd will affect the morphology of the catalyst.It was found that the prepared PtPd/CNTs had excellent catalytic performance for methanol oxidation.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36;TM911.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 Huan Su;Tie-Hong Chen;;Preparation of PtSn_2 SnO_2/C nanocatalyst and its high performance for methanol electro-oxidation[J];Chinese Chemical Letters;2016年07期

2 黎海超;陳水挾;李啟漢;劉風(fēng)雷;;微波輔助加熱乙二醇法制備PtSn/CNT催化劑:pH值對(duì)其結(jié)構(gòu)和電氧化甲醇性能的影響（英文）[J];新型炭材料;2016年03期

3 洪錦德;劉子豪;維拉庫瑪;吳培豪;劉端祺;劉尚斌;;用于燃料電池陽極的有序介孔碳負(fù)載的雙功能Pt-M(M=Ru,Fe,Mo)電催化劑（英文）[J];催化學(xué)報(bào);2016年01期

4 王宗花;史國(guó)玉;夏建飛;張菲菲;夏延致;李延輝;夏臨華;;直接甲醇燃料電池Pt基陽極催化劑的研究進(jìn)展[J];化學(xué)學(xué)報(bào);2013年09期

5 干林;杜鴻達(dá);李寶華;康飛宇;;載體炭與Pt催化劑之間的相互作用及其引起的尺寸效應(yīng)(英文)[J];新型炭材料;2010年01期

6 趙新生,孫公權(quán),王素力,孫海,汪國(guó)雄,衣寶廉,楊少華,辛勤;DMFC陽極催化層離子電阻的測(cè)定和優(yōu)化[J];電源技術(shù);2004年12期

7 唐亞文,李鋼,楊輝,邢巍,陸天虹;Pt粒子的粒徑大小對(duì)甲醇電催化氧化性能的影響[J];南京師大學(xué)報(bào)(自然科學(xué)版);2003年02期

相關(guān)博士學(xué)位論文 前2條

1 初園園;直接甲醇燃料電池陽極Pt基催化劑可控合成及性能研究[D];哈爾濱工業(yè)大學(xué);2011年

2 姜魯華;直接醇類燃料電池陽極鉑基電催化劑的研究[D];中國(guó)科學(xué)院研究生院（大連化學(xué)物理研究所）;2005年

相關(guān)碩士學(xué)位論文 前2條

1 和璐;鉑催化劑催化二氯苯加氫脫氯的研究[D];青島科技大學(xué);2015年

2 任丹丹;Pt-Sn/Graphene-N對(duì)乙醇電催化氧化性能的研究[D];太原理工大學(xué);2015年

，

本文編號(hào)：1756850