CAJ | 학술논문

采用不同还原剂和碳载体,通过柠檬酸盐稳定法制备直接甲醇燃料电池用担载量为60%的Pt/C催化剂,通过X射线衍射(XRD),透射电子显微镜(TEM)和循环伏安(CV)等手段对催化剂进行表征.结果表明:柠檬酸盐加入和还原剂优化可以很好地控制铂纳米颗粒的粒径,而碳载体的选择对催化剂的电催化活性有很大影响.在采用柠檬酸钠做稳定剂、甲醛做还原剂、BP2000碳粉做载体的条件下,制备的60% Pt/BP2000催化剂性能最佳,平均粒径约2 nm,电化学活性面积为66.46 m2/g.使用该材料作为阴极催化剂的直接甲醇燃料电池单电池最大功率密度可达到78.8 mW/cm2.
채용불동환원제화탄재체,통과저몽산염은정법제비직접갑순연료전지용담재량위60%적Pt/C최화제,통과X사선연사(XRD),투사전자현미경(TEM)화순배복안(CV)등수단대최화제진행표정.결과표명:저몽산염가입화환원제우화가이흔호지공제박납미과립적립경,이탄재체적선택대최화제적전최화활성유흔대영향.재채용저몽산납주은정제、갑철주환원제、BP2000탄분주재체적조건하,제비적60% Pt/BP2000최화제성능최가,평균립경약2 nm,전화학활성면적위66.46 m2/g.사용해재료작위음겁최화제적직접갑순연료전지단전지최대공솔밀도가체도78.8 mW/cm2.
Platinum nanoparticles supported on carbons (Pt/C, 60%, mass fraction) electrocatalysts for direct methanol fuel cell (DMFC) were prepared by citrate-stabilized method with different reductants and carbon supports. The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and cyclic voltammetry (CV). It is found that the size of Pt nanoparticles on carbon is controllable by citrate addition and reductant optimization, and the form of carbon support has a great influence on electrocatalytic activity of catalysts. The citrate-stabilized Pt nanoparticles supported on BP2000 carbon, which was reduced by formaldehyde, exhibit the best performance with about 2 nm in diameter and 66.46 m2/g (Pt) in electrocatalytic active surface (EAS) area. Test on single DMFC with 60% (mass fraction) Pt/BP2000 as cathode electrocatalyst showed maximum power density at 78.8 mW/cm2.