Synthesis of Graphitic Mesoporous Carbon from Metal Impregnated Silica Template for Proton Exchange Membrane Fuel Cell Application
Synthesis of Graphitic Mesoporous Carbon from Metal Impregnated Silica Template for Proton Exchange Membrane Fuel Cell Application
复制标题
DOI：
10.1002/fuce.201800034
复制
发表时间：
2019-01
期刊：
影响因子：
2.8
通讯作者：
K. Sultana;D. Worku;M. Hossain;S. Ilias
中科院分区：
文献类型：
--
作者：
K. Sultana;D. Worku;M. Hossain;S. Ilias
采用基于硬模板的合成方法，通过催化石墨化反应合成了高比表面积石墨化介孔碳(M-mGMC；M=Ni、Fe、Co或Ni-Fe)。将自制的SBA-15二氧化硅材料浸渍金属前驱体，制得M/SBA-15模板，用于合成M-mGMC。采用氮气吸附脱附(BET)、X射线衍射仪(XRD)、拉曼光谱、X射线光电子能谱(XPS)、热重分析(TGA)和差示扫描量热法(DSC)等表征手段对这些材料进行了表征。四种M-mGMC的比表面积从1,227.9m2 g−1到1,320.7m2 g−1不等。拉曼光谱、XPS和广角X射线衍射表明，这些材料中存在石墨化结构并伴有无序。在单堆质子交换膜燃料电池(PEMFC)上评价了这些材料和常规炭黑(Vulcan XC-72)的电催化性能。与Pt/Ni-mGMC、Pt/Fe-mGMC和Pt/Co-mGMC电催化剂相比，PT/NiFe-mGMC具有更高的电催化活性。然而，与铂/Vulcan XC-72相比，铂/NiFe-mGMC在膜电极组件(MEA)中缺乏足够的质子传输。本探索性研究表明，NiFe-mGMC可作为电催化剂载体材料应用于质子交换膜燃料电池。
High surface area graphitic mesoporous carbons (M‐mGMC; M=Ni, Fe, Co or Ni‐Fe) were synthesized via catalytic graphitization using a hard template based synthesis method. In house prepared SBA‐15 silica material was impregnated with metal precursors to obtain M/SBA‐15, template for M‐mGMC synthesis. These materials were studied using different material characterization techniques, such as nitrogen adsorption desorption (BET), X‐ray diffraction (XRD) analysis, Raman spectroscopy, X‐ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Specific surface area ranging from 1,227.9 m2 g−1 to 1,320.7 m2 g−1 was observed for four M‐mGMCs. Raman spectroscopy, XPS and wide angle XRD suggested presence of graphitic structure in these materials along with disorders. Electrocatalytic performance of these materials along with conventional carbon black (Vulcan XC‐72) were evaluated in a single‐stack proton exchange membrane fuel cell (PEMFC). Pt/NiFe‐mGMC exhibited enhanced electrocatalytic activity compared to Pt/Ni‐mGMC, Pt/Fe‐mGMC and Pt/Co‐mGMC electrocatalysts. However, Pt/NiFe‐mGMC lacked adequate proton transport in membrane electrode assembly (MEA) compared to Pt/Vulcan XC‐72. This exploratory study showed that NiFe‐mGMC may find application as electrocatalyst support material in PEMFC.