CAJ | 학술논문

研究了N及Sn元素掺杂的TiO_2(NTT)对Pt/C电催化活性的影响,并在全增湿及低增湿工况下,考察了NTT/Pt/C催化剂所构成的质子交换膜燃料电池(PEMFC)的性能.制备了N及Sn掺杂的TiO_2,X射线光电子光谱法(XPS)、透射电子显微镜法(TEM)及X射线衍射光谱法(XRD)表征说明N及Sn元素已经掺入到TiO_2中,其颗粒平均粒径为14.3 nm,晶形为单一锐钛矿型.以不同比例混入Pt/C催化剂后,对NTT/Pt/C共混催化剂进行了循环伏安扫描和旋转圆盘电极测试,研究了其对Pt/C催化剂电化学活性面积及氧还原半波电位的影响;并在不同增湿条件下,在单电池中对NTT/Pt/C及Pt/C催化剂进行了测试.结果发现NTT不仅可以促进Pt/C催化剂活性,并且具有一定的保水能力,在低增湿工况下可以显著提升PEMFC的性能.
연구료N급Sn원소참잡적TiO_2(NTT)대Pt/C전최화활성적영향,병재전증습급저증습공황하,고찰료NTT/Pt/C최화제소구성적질자교환막연료전지(PEMFC)적성능.제비료N급Sn참잡적TiO_2,X사선광전자광보법(XPS)、투사전자현미경법(TEM)급X사선연사광보법(XRD)표정설명N급Sn원소이경참입도TiO_2중,기과립평균립경위14.3 nm,정형위단일예태광형.이불동비례혼입Pt/C최화제후,대NTT/Pt/C공혼최화제진행료순배복안소묘화선전원반전겁측시,연구료기대Pt/C최화제전화학활성면적급양환원반파전위적영향;병재불동증습조건하,재단전지중대NTT/Pt/C급Pt/C최화제진행료측시.결과발현NTT불부가이촉진Pt/C최화제활성,병차구유일정적보수능력,재저증습공황하가이현저제승PEMFC적성능.
The effects of N and Sn doped TiO_2 (NTT) on the electrocatalytic activity of Pt/C were investigated, and the performance of NTT/Pt/C catalyst within proton exchange membrane fuel cell (PEMFC) under full and low humidity were also evaluated. The anatase NTT with average size 14.3 nm were prepared, which could be proven by XPS,TEM, and XRD. NTT/Pt/C catalysts with different contents of Pt/C were tested by cyclic voltammetry and rotating disk electrode method to investigate the electrochemical active surface area as well as their half-wave potential of oxygen reduction reaction. The NTT/Pt/C catalysts were also tested within single cells under different humidity. The results indicate that with the addition of NTT, the activity of Pt/C can be improved and the performance of PEMFC under low humidity is also highly promoted mainly due to the water retention characteristic of NTT.