CAJ | 학술논문

在玻碳电极上采用吸附法制备了四溴代酞菁钴(CoPcBr_4)、酞菁钴(CoPc)和四-α-(2,2,4-三甲基-3-戊氧基)酞菁钴(CoPc(OC_8H_(17))_4)修饰电极. 利用循环伏安法和线性扫描伏安法研究了修饰电极在酸性介质中对分子氧的电催化还原,比较了不同取代基的酞菁钴对电催化性质的影响. 结果表明,它们对分子氧还原均具有良好的电催化活性,其中酞菁钴和四-α-(2,2,4-三甲基-3-戊氧基)酞菁钴对O_2的催化是2电子还原生成H_2O_2,与裸电极相比,O_2的还原峰电位分别向正方向移动了0.33和0.48 V. 而四溴代酞菁钴修饰电极在-0.1和-0.7 V附近产生的2个还原峰,说明它催化O_2到H_2O_2的还原以后还可以促进H_2O_2继续还原到H_2O,最终实现O_2的4电子还原.
재파탄전겁상채용흡부법제비료사추대태정고(CoPcBr_4)、태정고(CoPc)화사-α-(2,2,4-삼갑기-3-무양기)태정고(CoPc(OC_8H_(17))_4)수식전겁. 이용순배복안법화선성소묘복안법연구료수식전겁재산성개질중대분자양적전최화환원,비교료불동취대기적태정고대전최화성질적영향. 결과표명,타문대분자양환원균구유량호적전최화활성,기중태정고화사-α-(2,2,4-삼갑기-3-무양기)태정고대O_2적최화시2전자환원생성H_2O_2,여라전겁상비,O_2적환원봉전위분별향정방향이동료0.33화0.48 V. 이사추대태정고수식전겁재-0.1화-0.7 V부근산생적2개환원봉,설명타최화O_2도H_2O_2적환원이후환가이촉진H_2O_2계속환원도H_2O,최종실현O_2적4전자환원.
Tetrabromophthalocyanine cobalt(CoPcBr_4), phthalocyanine cobalt(CoPc) and tetra-α-(2,2,4-trimethyl-3-pentyloxy)phthalocyanine cobalt(CoPc(OC_8H_(17))_4) modified electrodes were prepared on glassy carbon(GC) electrodes by the adsorption method. Electrocatalytic reduction of molecular oxygen by the modified electrodes was studied in acidic media by means of cyclic voltammetry and linear sweep volammetry. The effects of phthalocyanine cobalt with different substituted groups on electrocatalytic property were compared. The results indicate that they had good electrocatalytic activity for molecular oxygen reduction. CoPc and CoPc(OC_8H_(17))_4 could catalyze O_2 to give H_2O_2 via two-electron transfer and the reduction peak potentials of O_2 positively shifted by 0.33 V and 0.48 V respectively compared with the bare GC electrode. There are two reduction peaks at about -0.1 V and -0.7 V in the voltammogram obtained at CoPcBr_4 modified electrode, indicating that it catalyzed the reduction of O_2 to H_2O_2 and then sequentially reduced H_2O_2 to H_2O. Finally, it completed the four-electron reduction of O_2.