催化学报
催化學報
최화학보
CHINESE JOURNAL OF CATALYSIS
2009年
10期
1012-1016
,共5页
刘影%赵红%闫世友%齐静%孙公权
劉影%趙紅%閆世友%齊靜%孫公權
류영%조홍%염세우%제정%손공권
钯%钴%碳载催化剂%电催化剂%氧还原反应%直接甲醇燃料电池
鈀%鈷%碳載催化劑%電催化劑%氧還原反應%直接甲醇燃料電池
파%고%탄재최화제%전최화제%양환원반응%직접갑순연료전지
palladium%cobalt%carbon-supported catalyst%electrocatalyst%oxygen reduction reaction%direct methanol fuel cell
以NaBH4为还原剂,采用共还原法和分步还原法制备了粒径分布均匀的Pd/C和Pd-Co/C电催化剂.X射线衍射、透射电镜、电化学循环伏安和旋转厕盘电极等表征结果表明,与Pd/C电催化剂相比,两种方法制备的Pd-Co/C电催化剂的晶格常数明显缩小,其中分步还原法制备的电催化剂不仅具有良好的氧还原活性,而且表现了良好的耐甲醇性能.
以NaBH4為還原劑,採用共還原法和分步還原法製備瞭粒徑分佈均勻的Pd/C和Pd-Co/C電催化劑.X射線衍射、透射電鏡、電化學循環伏安和鏇轉廁盤電極等錶徵結果錶明,與Pd/C電催化劑相比,兩種方法製備的Pd-Co/C電催化劑的晶格常數明顯縮小,其中分步還原法製備的電催化劑不僅具有良好的氧還原活性,而且錶現瞭良好的耐甲醇性能.
이NaBH4위환원제,채용공환원법화분보환원법제비료립경분포균균적Pd/C화Pd-Co/C전최화제.X사선연사、투사전경、전화학순배복안화선전측반전겁등표정결과표명,여Pd/C전최화제상비,량충방법제비적Pd-Co/C전최화제적정격상수명현축소,기중분보환원법제비적전최화제불부구유량호적양환원활성,이차표현료량호적내갑순성능.
Pd/C and Pd-Co/C electrocatalysts were prepared by sodium borohydride co-reduction and successive reduction. X-ray diffraction, transmission electron microscopy, cyclic voltammetry, and rotating disk electrode were carried out to characterize these electrocatalysts. The results showed that the Pd-Co/C electrocatalysts have a single-phase face-centered-cubic disordered structure and the lattice constant is obviously smaller than that of Pd/C electrocatalyst. The Pd-Co/C electrocatalyst prepared by the successive reduction method not only has the highest oxygen reduction reaction activity but also shows good methanol tolerant capability.
