安徽科技学院学报
安徽科技學院學報
안휘과기학원학보
JOURNAL OF ANHUI SCIENCE AND TECHNOLOGY UNIVERSITY
2011年
5期
47-51
,共5页
循环伏安法%Pt-Sn/GC电极%乙醇%电催化氧化
循環伏安法%Pt-Sn/GC電極%乙醇%電催化氧化
순배복안법%Pt-Sn/GC전겁%을순%전최화양화
Cyclic Voltammetry%Pt - Sn/GC Electrode%Ethanol%Electrocatalytic Oxidation
采用循环伏安法制备了Pt-Sn/GC电极,并用电化学方法研究了Pt-Sn/GC电极对乙醇的电催化氧化。实验结果表明:乙醇在Pt/GC电极和Pt-Sn/GC电极上均能自发氧化解离,产生强吸附中间体COad,而Sn的加入降低了COad在电极表面的吸附量和覆盖度,抑制了乙醇的自发氧化解离,提高了催化剂的活性;与Pt/GC电极相比,乙醇在Pt-Sn/GC电极上的起始氧化电位负移80mV,正向扫描氧化峰电位负移60mV,电流增大1倍。当沉积量为100r时,Pt-Sn/GC电极对乙醇的电催化活性最高。
採用循環伏安法製備瞭Pt-Sn/GC電極,併用電化學方法研究瞭Pt-Sn/GC電極對乙醇的電催化氧化。實驗結果錶明:乙醇在Pt/GC電極和Pt-Sn/GC電極上均能自髮氧化解離,產生彊吸附中間體COad,而Sn的加入降低瞭COad在電極錶麵的吸附量和覆蓋度,抑製瞭乙醇的自髮氧化解離,提高瞭催化劑的活性;與Pt/GC電極相比,乙醇在Pt-Sn/GC電極上的起始氧化電位負移80mV,正嚮掃描氧化峰電位負移60mV,電流增大1倍。噹沉積量為100r時,Pt-Sn/GC電極對乙醇的電催化活性最高。
채용순배복안법제비료Pt-Sn/GC전겁,병용전화학방법연구료Pt-Sn/GC전겁대을순적전최화양화。실험결과표명:을순재Pt/GC전겁화Pt-Sn/GC전겁상균능자발양화해리,산생강흡부중간체COad,이Sn적가입강저료COad재전겁표면적흡부량화복개도,억제료을순적자발양화해리,제고료최화제적활성;여Pt/GC전겁상비,을순재Pt-Sn/GC전겁상적기시양화전위부이80mV,정향소묘양화봉전위부이60mV,전류증대1배。당침적량위100r시,Pt-Sn/GC전겁대을순적전최화활성최고。
Pt -Sn/GC electrode was prepared by cyclic voltammertic method, and electrocatalytic oxidization be- havior of ethanol on Pt - Sn/GC electrode was studied by electrochemical method. Experimental results show that the self - oxidation dissociation phenomenon of ethanol to produce strong adsorption intermediate COad at Pt/GC and Pt - Sn/GC electrodes was found. And with the additive of Sn the adsorption and the coverage of COad on the electrode surface was decreased, the self - oxidation dissociation of ethanol at Pt - Sn/GC electrodes was sup- pressed, and catalytic activity of catalyst was improved. Compared with Pt/GC electrode, the on set oxidation potential of ethanol oxidation at Pt - Sn/GC electrodes was shifted negatively by 80mV, and apex oxidation po- tential was shifted negatively by 60mV too, and the current inreased from 17.56 to 35.28mA/cm2. The catalytic activity of ethanol at Pt - Sn/GC electrode was best when the cyclic times were 100.