基于纳米CdS对尿酸的光催化氧化和铜(Ⅱ)配合物对氧的电催化还原的燃料电池性能  

Fabrication and Performance of a Novel Visible Light-driven Fuel Cell Based on Photocatalytic Oxidation of Uric Acid by CdS Nanoparticles and Electrocatalytic Reduction of Oxygen by a Copper(Ⅱ) Complex

作　　者：骆金苑 陈琳琳[1] 王奕[1] 李红[1] 

机构地区：[1]华南师范大学化学与环境学院,广州510006

出　　处：《高等学校化学学报》2015年第12期2468-2474,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21271075);广东省自然科学基金(批准号:10351063101000001)资助~~

摘　　要：以纳米硫化镉薄膜修饰的铟锡氧化物电极(Cd S/ITO)作光阳极,铜(Ⅱ)配合物[Cu(phen)(L-Trp)·(H_2O)]^+(phen=1,10-菲啰啉,L-Trp=L-色氨酸)修饰单壁碳纳米管(SWCNTs)电极作阴极,构建了光催化尿酸(UA)燃料电池,并研究了其性能及热处理温度的影响.结果表明,在40℃以下获得的纳米Cd S修饰电极在320~550 nm波长区间显现明显的吸收和光伏响应,在可见光辐射下能光催化氧化UA;较高温度的热处理(200~300℃)却降低了纳米Cd S对UA的光催化氧化活性.[Cu(phen)(L-Trp)(H_2O)]^+/SWCNTs电极在-0.131 V电位下呈现一对准可逆的氧化还原峰,并能电催化还原O_2和H_2O_2.此外,基于UA在Cd S/ITO电极上的光催化氧化及O_2在[Cu(phen)(L-Trp)(H_2O)]^+/SWCNTs电极上的电催化还原,组装了UA(0.2mmol/L)燃料电池,其在可见光照射(0.18 m W/cm^2)下产生0.52 V开路电压,13.08μA/cm^2短路光电流,在0.41 V下呈现的最大功率密度为4.10μW/cm^2.A novel visible light-driven uric acid（UA） fuel cell was preprared by employing CdS nanoparticles modified indium-tin oxide photoanode （CdS/ITO） and [ Cu （phen） （L-Trp） （ H2O） ] ＋ （ phen = 1,10-phenan- throthine and L-Trp=L-tryptophan） modified single-walled nanotubes（SWCNTs） cathode. The CdS nanoparticles obtained after thermal treatment at 40℃ show obvious absorption and open-circuit photovohage responses between 320 and 550 nm. The CdS/ITO electrode exhibits good photocatalytie activity towards the oxidation of uric acid（UA） upon visible light irradiation. The CdS nanoparticles prepared at high temperatures between 200 and 300 ℃ show smaller photocatalytic activities than those obtained at 40 ℃. The [ Cu（ phen ）（L-Trp）. （H2O）]＋/SWCNTs electrode exhibits a pair of quasi-reversible redox peaks at the formal potential of -0. 131 V, indicating the electrocatalytic activity towards the reduction of both O2 and H2O2. Furthermore, on the basis of photocatalysis of CdS nanoparticles and electroeatalysis of [ Cu （phen）（L-Trp）（ H2O） ] ＋, a photocatalytic UA （0.2 mmol/L ） fuel cell was elaborately assembled, which showed an open-circuit photovohage of 0. 52 V, a short-circuit photocurrent of 13.08 p.A/cm^2 and a maximum power density of 13.08 μW/cm^2 at 0. 41 V upon the visible light irradiation of 0. 18 mW/cm^2.

关 键 词：尿酸 燃料电池 光催化氧化 硫化镉 电催化还原 铜(Ⅱ)配合物 

分 类 号：O646[理学—物理化学]