Pt_mAu/石墨烯催化剂对甲醇的电催化氧化性能研究
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- 英文论文题名：Catalytic performance of Pt_mAu/graphene for Methanol oxidation reaction
- 论文作者：宋桂花 ; 张强 ; 孙雅飞 ; 王静怡 ; 曲卫东 ; 冯媛媛
- 英文论文作者：Gui-Hua Song ; Qiang Zhang ; Ya-Fei Sun ; Jing-Yi Wang ; Wei-Dong Qu ; Yuan-Yuan Feng ; College of Chemistry and Chemical Engineering ; Qufu Normal University
- 年：2016
- 作者机构：曲阜师范大学化学与化工学院;
- 论文关键词：石墨烯 ; 金 ; 铂 ; 催化剂 ; 甲醇电氧化反应
- 英文论文关键词：Graphene ; Gold ; Platinum ; Catalyst ; Methanol electrooxidation reaction
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十二分会：能源纳米材料物理化学
- 语种：中文
- 分类号：O621.251
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十二分会 ; 能源纳米材料物理化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：305k
- 原文格式：D
- 会议级别：全国
摘要
石墨烯是由以sp~2方式杂化的碳原子堆积而成的二维蜂窝状晶格结构的新型碳质材料,拥有独特的物理化学性质,应用前景十分广阔~([1])。本工作采用改进的Hummers法~([2])制备了氧化石墨烯(GO),然后采用共还原法制备了不同原子Pt/Au比(m)的Pt_mAu/石墨烯电催化剂,用于甲醇电氧化反应的催化性能研究。结果显示,向Pt催化剂中引入Au,Pt_mAu/石墨烯催化剂上甲醇氧化的峰电流明显高于Pt/石墨烯样品,表明Au的引入可显著提升Pt在碱性介质中催化氧化甲醇的性能。在系列Pt_mAu/石墨烯中,原子Pt/Au比为2:1时(m=2),即Pt_2Au/石墨烯催化剂的催化活性最高,-0.10 V处的峰电流为1.26 A mg~(-1)Pt,是Pt/石墨烯样品(0.29 A mg~(-1)Pt)的4.3倍左右。
Graphene is made by way of sp~2 hybridization carbon atoms in a two-dimensional honeycomb lattice structure formed from the accumulation of new carbon material. It has the unique physical and chemical properties and the application prospect is very broad. In this work, a series of Pt_mAu/graphene samples are prepared and employed as the catalysts for methanol electrooxidation reaction in alkaline electrolyte. Results show that the oxidation currents of methanol on Pt catalysts with gold as the promoter are higher than that on pure Pt catalyst. Among the catalysts, Pt_2Au/grapheme shows the highest catalytic activity, the mass specific activity of Pt is 1.26 A mg~(-1)Pt, which is ca. 4.3 times that of Pt/graphene catalyst.
Graphene is made by way of sp~2 hybridization carbon atoms in a two-dimensional honeycomb lattice structure formed from the accumulation of new carbon material. It has the unique physical and chemical properties and the application prospect is very broad. In this work, a series of Pt_mAu/graphene samples are prepared and employed as the catalysts for methanol electrooxidation reaction in alkaline electrolyte. Results show that the oxidation currents of methanol on Pt catalysts with gold as the promoter are higher than that on pure Pt catalyst. Among the catalysts, Pt_2Au/grapheme shows the highest catalytic activity, the mass specific activity of Pt is 1.26 A mg~(-1)Pt, which is ca. 4.3 times that of Pt/graphene catalyst.
引文
[1]Novoselov,K.S.;Geim,A.K.;Morozov,S.V.;Jiang,D.;Zhang,Y.;Dubonos,S.V.;Grigorieva,I.V.;Firsov,A.A.Science,2004,306(5696):666-669.
[2]Hummers,W.S.;Offeman,R.E.J.Am.Chem.Soc.,1958,80(6):1339-1339.
[2]Hummers,W.S.;Offeman,R.E.J.Am.Chem.Soc.,1958,80(6):1339-1339.