冷冻法合成Pt/3DGNs-C复合物及其电催化甲醇氧化性能
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- 英文论文题名：Freezing synthesis of Pt/3DGNs-C composite and its electrocatalysis for methanol oxidation
- 论文作者：王艳丽 ; 李忠水 ; 雷丰玲 ; 许淑虹 ; 林深
- 英文论文作者：Yan Li Wang ; Zhongshui Li ; Fengling Lei ; shuhong Xu ; Shen Lin ; College of Chem.& Chem.Engin. ; Fujian Normal Univ.
- 年：2016
- 作者机构：福建师范大学化学与化工学院;
- 论文关键词：3D石墨烯 ; 炭黑 ; 铂纳米粒子 ; 甲醇氧化
- 英文论文关键词：financially supported by National Natural Science Foundation of China(No ; 21171037)
- 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-第二十九分会：电化学材料
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 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：376k
- 原文格式：D
- 会议级别：全国
摘要
三维石墨烯是具有三维(3D)结构的新型石墨烯形态,具有丰富的多孔立体结构和大的比表面积[1]。本文中,以抗坏血酸为还原剂,采用回流条件下同步还原,再置于液氮中迅速冷冻的方法合成Pt/3D GNs-C复合物。其中Vulcan XC-72R炭黑的加入使金属前驱体的吸附率增加进而改变金属的分散度,且极细颗粒状的炭黑与多孔石墨烯混合组成载体,使载体表面形貌发生改变,为Pt粒子的还原提供了更多的附着位点,起着"间隔剂"的作用[2]。由扫描电镜图1可见,所合成的石墨烯复合物具有丰富的三维多孔结构和大的孔体积。炭黑和3D石墨烯的高导电性及其优良载体性能,有助于提高Pt/3DGNs+C复合物的电催化性能。电化学实验表明,Pt/3DGNs-C复合物对甲醇氧化呈现出良好的电催化性能(图2)。
Three-dimensional(3D) graphene is a new type of graphene with 3D structure, which has rich porous structure and large specific surface area. In this work, Pt/3DGNs-C was synthesized through condensation reflux method, with the synchronous reduction of platinum precursors and graphene oxide using ascorbic acid as reduction agent. The introduction of Vulcan XC-72 R, acting as spacers between graphene layers, is helpful for forming the 3D structure of GNs to increase the adsorption rate of metal precursor and improve the dispersion of Pt nanoparticles. SEM reveals that as-synthesized graphene based composite has an obvious 3D porous structure(Fig.1). Electrochemical experiments show Pt/3DGNs-C has much higher electrocatalytic activity toward methanol oxidation reaction(Fig.2) due to the good conductivity of hybrid supports and larger surface area.
Three-dimensional(3D) graphene is a new type of graphene with 3D structure, which has rich porous structure and large specific surface area. In this work, Pt/3DGNs-C was synthesized through condensation reflux method, with the synchronous reduction of platinum precursors and graphene oxide using ascorbic acid as reduction agent. The introduction of Vulcan XC-72 R, acting as spacers between graphene layers, is helpful for forming the 3D structure of GNs to increase the adsorption rate of metal precursor and improve the dispersion of Pt nanoparticles. SEM reveals that as-synthesized graphene based composite has an obvious 3D porous structure(Fig.1). Electrochemical experiments show Pt/3DGNs-C has much higher electrocatalytic activity toward methanol oxidation reaction(Fig.2) due to the good conductivity of hybrid supports and larger surface area.
引文
[1]Wang,J.D.;Xian,H.Y.;Peng,T.J.;Sun,H.J.RSC Adv.2015,5:13607–13612.
[2]Yue,X.Y.;Yang,W.X.;Liu,X.J.;Wang,Y.Z.Electrochimica Acta.2015,174:667–671.
[2]Yue,X.Y.;Yang,W.X.;Liu,X.J.;Wang,Y.Z.Electrochimica Acta.2015,174:667–671.