基于多金属氧簇制备的高性能的电化学析氢催化剂
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- 英文论文题名：Highly Efficient Hydrogen Evolution Electrocatalysts Based on Coupled Molybdenum Carbide and Reduced Graphene Oxide
- 论文作者：李顺利 ; 兰亚乾
- 英文论文作者：Shun-Li Li ; Ya-Qian Lan ; School of Chemistry and Materials Science ; Nanjing Normal University
- 年：2016
- 作者机构：南京师范大学化学与材料科学学院;
- 论文关键词：多酸 ; 电化学析氢 ; 催化剂
- 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-第十六分会：晶体工程
- 语种：中文
- 分类号：O641.4;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十六分会 ; 晶体工程
- 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：158k
- 原文格式：D
- 会议级别：全国
摘要
我们第一次合成了多酸基/导电聚合物/石墨烯二维材料体系,利用该二维材料体系制备了石墨烯负载的氮、磷掺杂的多孔碳包裹的碳化钼。利用多酸/导电聚合物/石墨烯合成碳基复合材料有以下优势:在石墨烯片层中引入多酸可以阻止石墨烯堆叠和聚集;导电聚合物将多酸均匀的固定在石墨烯的表面,有利于合成碳包覆峰纳米材料,同时可以阻碍纳米粒子的团聚;氮、磷等杂原子掺杂有利于电化学催化剂的提高。该纳米复合材料Mo_2C@NPC/NPRGO作为电催化剂用于析氢反应,在酸性电解液中,其起始电位约为0mV(vs.RHE),Tafel斜率为33.6mVdec-1,是己报道的非贵金属电催化剂性能最好的,可以与Pt/C媲美。
We provide the first report of a novel two-dimensional coupled hybrid of molybdenum carbide and reduced graphene oxide(RGO) with a ternary polyoxometalates-polypyrrole/RGO(POMs-PPy/RGO) nanocomposite as a precursor.The hybrid exhibits outstanding electrocatalytic activity for the HER and excellent stability in acidic media,which is the best among these reported non-noble-metal catalysts to date.Theoretical calculations based on density functional theory reveal that the highly active sites for the HER stem from the pyridinic N,as well as the C atoms,in the graphene.In a proof-of-concept trial,an excellent electrocatalyst for the HER was fabricated,which opens a new avenue for the design of novel nanomaterials utilizing POMs/conducting polymer/RGO nanocomposites.
We provide the first report of a novel two-dimensional coupled hybrid of molybdenum carbide and reduced graphene oxide(RGO) with a ternary polyoxometalates-polypyrrole/RGO(POMs-PPy/RGO) nanocomposite as a precursor.The hybrid exhibits outstanding electrocatalytic activity for the HER and excellent stability in acidic media,which is the best among these reported non-noble-metal catalysts to date.Theoretical calculations based on density functional theory reveal that the highly active sites for the HER stem from the pyridinic N,as well as the C atoms,in the graphene.In a proof-of-concept trial,an excellent electrocatalyst for the HER was fabricated,which opens a new avenue for the design of novel nanomaterials utilizing POMs/conducting polymer/RGO nanocomposites.
引文
[1]J.-S.Li,Z.-H.Dai,Y.-Q.Lan,*et al,Nat.Com.,2016,7,11204,.