新型炭材料
新型炭材料
신형탄재료
NEW CARBON MATERIALS
2011年
4期
262-270
,共9页
郑俊生%王喜照%符蓉%李平%杨代军%吕洪%马建新
鄭俊生%王喜照%符蓉%李平%楊代軍%呂洪%馬建新
정준생%왕희조%부용%리평%양대군%려홍%마건신
纳米炭纤维%CNF/CP复合体%催化化学气相沉积%电催化性能%氧气还原反应
納米炭纖維%CNF/CP複閤體%催化化學氣相沉積%電催化性能%氧氣還原反應
납미탄섬유%CNF/CP복합체%최화화학기상침적%전최화성능%양기환원반응
Carbon nanofibers%Carbon nanofiber/carbon paper composite%Catalytic chemical vapor deposition%Electrocatalytic properties%Oxygen-reduction reaction
利用催化气相化学沉积(Catalytic chemical vapor deposition,CCVD)法在炭纸上原位生长得到CNF/CP复合体,并对这种复合体的物理化学性能和氧气电催化还原反应(Oxygen reduction reaction,ORR)性能进行了研究.结果表明:纳米炭纤维较为均匀地分散在炭纸上,其中纳米炭纤维具有窄的直径分布.所制CNF/CP复合体具有较大的比表面积和独特的中孔结构;相对于炭纸,CNF/CP复合体的端面碳原子和基面碳原子比例较高.另外,CNF/CP还具有较高的ORR反应活性,其ORR为2电子反应过程,原因可以归结于纳米炭纤维独特的微结构.同时,CNF/CP也具有较高的交换电流密度和较正的平衡电压.
利用催化氣相化學沉積(Catalytic chemical vapor deposition,CCVD)法在炭紙上原位生長得到CNF/CP複閤體,併對這種複閤體的物理化學性能和氧氣電催化還原反應(Oxygen reduction reaction,ORR)性能進行瞭研究.結果錶明:納米炭纖維較為均勻地分散在炭紙上,其中納米炭纖維具有窄的直徑分佈.所製CNF/CP複閤體具有較大的比錶麵積和獨特的中孔結構;相對于炭紙,CNF/CP複閤體的耑麵碳原子和基麵碳原子比例較高.另外,CNF/CP還具有較高的ORR反應活性,其ORR為2電子反應過程,原因可以歸結于納米炭纖維獨特的微結構.同時,CNF/CP也具有較高的交換電流密度和較正的平衡電壓.
이용최화기상화학침적(Catalytic chemical vapor deposition,CCVD)법재탄지상원위생장득도CNF/CP복합체,병대저충복합체적물이화학성능화양기전최화환원반응(Oxygen reduction reaction,ORR)성능진행료연구.결과표명:납미탄섬유교위균균지분산재탄지상,기중납미탄섬유구유착적직경분포.소제CNF/CP복합체구유교대적비표면적화독특적중공결구;상대우탄지,CNF/CP복합체적단면탄원자화기면탄원자비례교고.령외,CNF/CP환구유교고적ORR반응활성,기ORR위2전자반응과정,원인가이귀결우납미탄섬유독특적미결구.동시,CNF/CP야구유교고적교환전류밀도화교정적평형전압.
A carbon nanofiber/carbon paper (CNF/CP) composite was synthesized directly on CP by a catalytic chemical vapor-deposition method,and the physicochemical properties of and oxygen-reduction reaction (ORR) on this composite were investigated.Scanning electron microscopy shows that the CNFs are uniformly distributed on the CP,and high-resolution transmission electron microscopy results show that the CNFs have a narrow size distribution.The CNF/CP composite has a large surface area,and its mesoporous character is confirmed by N2physisorption.Raman spectrum studies show that the CNF/CP composite has a high ratio of edge atoms to basal atoms compared with that of CP.From cyclic voltammetry studies,the CNF/CP composite was found to be more active than CP in terms of ORR,which may be due to the contribution from the CNFs.The CNF/CP composite shows a higher exchange current density and more positive equilibrium potential than CP,as verified by Tafel analysis.Moreover,linear-sweep voltammetry confirms that ORR on the CNF/CP composite is conducted through a two-electron reaction pathway.