Pt-ACF内氢氧催化反应中水的形态演变实验观察  

Experimental observation of water evolution during hydrogen-oxygen reaction in Pt-ACF

作　　者：李雄威[1] 彭晓峰[1] 谭勤学[1] 叶长流[1] 

机构地区：[1]清华大学热能工程系相变与界面传递现象实验室,北京100084

出　　处：《热科学与技术》2009年第1期13-19,共7页Journal of Thermal Science and Technology

基　　金：国家自然科学基金重点资助项目(50636030)

摘　　要：采用塑料圆管内载Pt活性炭纤维(Pt-ACF)模拟展示燃料电池中化学反应水的生成特性,针对不同反应时段利用微CT、红外测温仪和CCD进行Pt-ACF内外水形态可视化实验观察。初步实验观察表明,Pt-ACF上的催化剂含量、外部冷却条件以及Pt-ACF催化多孔层层数都能通过改变温度场和生成水速率显著地影响反应过程中Pt-ACF内外水的蒸发和凝结;Pt-ACF内的水形态演变还会受到Pt-ACF外形和内部微孔结构的影响。The activated carbon fiber containing platinum （Pt-ACF） in a plastic tube was used to simulate and display the characteristics of water production and evolution in PEMFC fuel cells. The production of water inside and outside the Pt-ACF was visualized using micro-CT, CCD and infrared thermometer during hydrogen-oxygen reaction. Results indicate that the amount of Pt deposited on the ACF, external cooling conditions and number of the Pt-ACF catalytic layers may significantly affect water production, evaporation and condensation inside and outside the Pt-ACF samples by changing the reaction temperature and the water generation rate. And the shape and internal porous structure of Pt-ACF have significant influence on water evolution.

关 键 词：质子交换膜燃料电池 膜电极 Pt活性炭纤维 氢氧催化反应 水态演化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]