CAJ | 학술논문

采用溶胶-凝胶法合成Fe~(3+)、Ce~(3+)掺杂SnO_2/C胶体,通过Vulcan XC-72炭黑负载制备炭载锡系氧化物电催化剂.经X射线粉末衍射(XRD)考察了催化电极的元素组成,利用循环伏安法(CV)研究苯酚在电极上的氧化降解,考察了不同的掺杂元素、不同的掺杂量、制备工艺等因素对电极催化性能的影响.结果表明:所合成的电催化剂中的金属氧化物的主要相态为金红石型SnO_2;Sn系列氧化物电极对苯酚具有一定的催化能力,适量Sb、Ce、V、Yb元素的掺杂有利于电极电化学性能的提高,Sb(2.5%)和Ce(2.5%)双掺的SnO_2/C/Ti电极的氧化峰电流最大,苯酚在电极表面氧化时,均会产生一层疏松的钝化膜,苯酚仍可以穿透这层钝化膜继续在电极上氧化.
채용용효-응효법합성Fe~(3+)、Ce~(3+)참잡SnO_2/C효체,통과Vulcan XC-72탄흑부재제비탄재석계양화물전최화제.경X사선분말연사(XRD)고찰료최화전겁적원소조성,이용순배복안법(CV)연구분분재전겁상적양화강해,고찰료불동적참잡원소、불동적참잡량、제비공예등인소대전겁최화성능적영향.결과표명:소합성적전최화제중적금속양화물적주요상태위금홍석형SnO_2;Sn계렬양화물전겁대분분구유일정적최화능력,괄량Sb、Ce、V、Yb원소적참잡유리우전겁전화학성능적제고,Sb(2.5%)화Ce(2.5%)쌍참적SnO_2/C/Ti전겁적양화봉전류최대,분분재전겁표면양화시,균회산생일층소송적둔화막,분분잉가이천투저층둔화막계속재전겁상양화.
Fe~(3+) and Ce~(3+) doped SnO_2/C were prepared by sol-gel method and Vulcan XC-72 carbon was used as carrier due to its porous structure. The composition of catalytic electrode was studied with XRD. The electroxidative behaviors of different doping elements were studied by electrochemical methods such as cyclte voltammetry (CV). The results indicated that the prepared samples were rutile SnO_2. These electrodes had electrocatalytic ability for phenol oxidation. Doping elements (Sb、Ce、V、Yb) and higher temp rature are beneficial for the improvement of DSA electrocatalytic ability. Sb(2. 5%) and Ce(2. 5%) co-deeping electrode had the highest peak current according to a3 which was the first step in phenoxy dectrcoxidation attributed to the formation of a phenoxy radical. Complete electrode passivation was not observed on polyoxyphenylene film which had covered dorninantly the coating surface.