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	碳载体对钴硒催化剂氧还原活性的影响; Effects of Carbon Supports on Electrocatalytic Activities of CoSe_2 Catalysts Toward Oxygen Reduction Reaction
	郑巧玲 ; 刘朝杨 ; 程璇 ; 李恒毅 ; 高东
	2015-09-28
关键词	钴硒催化剂 碳载体材料 氧还原反应 氧还原活性 cobalt selenide catalysts carbon support materials oxygen reduction reaction oxygen reduction reaction activity
英文摘要	选择了4种商用碳载体材料,即多壁碳纳米管(CnTS)、2种导电碳黑(bP2000和XC-72r)及石墨烯(gP),采用微波法分别制备了不同碳载体负载钴硒催化剂,考察了碳载体种类及柠檬酸预处理对钴硒催化剂晶体结构、表面形貌、催化剂中钴载量和酸性介质中氧还原反应(Orr)活性的影响.结果表明,未经柠檬酸处理的COSE2/bP2000和COSE2/XC-72r中钴载量分别达到15.6%和21.7%(质量分数,下同),比COSE2/CnTS(11.8%)和COSE2/gP(13.0%)中的钴载量要高,且较多的COSE2纳米颗粒能较好地分散并负载在XC-72r上,因此其氧还原催化活性较好,峰电位和Orr电位分别为285和410MV(VS.饱和甘汞电极(SCE)),转移电子数约为4.经柠檬酸处理后制备得到的不同碳载体负载钴硒催化剂的晶体结构、钴载量和氧还原活性没有明显改变,但降低了载体的石墨化程度,加剧了COSE2纳米颗粒在碳纳米管上的团聚.; In this work,four types of commercial carbon support materials,namely,multiwall carbon nanotubes(CNTs),Black Pearls 2000(BP2000)carbon black,Vulcan XC-72 Rcarbon black,and grapheme(GP),were used separately to prepare different carbon supported cobalt selenide(CoSe2/C)catalysts.The effects of carbon support type and pretreatment with citric acid on crystal structure,Co load and electrocatalytic activity toward oxygen reduction reaction(ORR)of the catalysts in an acidic medium were preliminarily examined.Without citric acid pretreatment,the Co loads in CoSe2/BP2000 and CoSe2/XC-72 Rreached 15.6%(by mass)and 21.7%(by mass),respectively,higher than those in CoSe2/CNTs(11.8%,by mass)and CoSe2/GP(13.0%,by mass).The highest Co load in CoSe2/XC-72 Rled to its best ORR activity.The peak potential and ORR potential of CoSe2/XC-72 Rwere 285mV and 410mV(vs.SCE),respectively,and the electron transfer number was about 4in sulfuric acid solution.However,the crystal structure,Co load,and ORR activity of CoSe2/C catalysts were not obviously affected by citric acid pretreatments of carbon supports.; 国家自然科学基金(11372263)
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/98519]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	郑巧玲,刘朝杨,程璇,等. 碳载体对钴硒催化剂氧还原活性的影响, Effects of Carbon Supports on Electrocatalytic Activities of CoSe_2 Catalysts Toward Oxygen Reduction Reaction[J],2015.
APA	郑巧玲,刘朝杨,程璇,李恒毅,&高东.(2015).碳载体对钴硒催化剂氧还原活性的影响..
MLA	郑巧玲,et al."碳载体对钴硒催化剂氧还原活性的影响".(2015).

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