Facile Synthesis of Three-Dimensional Graphene Nanomaterials via Supercritical Fluid for Oxygen Reduction Reaction
Facile Synthesis of Three-Dimensional Graphene Nanomaterials via Supercritical Fluid for Oxygen Reduction Reaction
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DOI：
10.1149/06917.0631ecst
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发表时间：
2015-09
影响因子：
13.5
通讯作者：
Chengzhou Zhu;Yazhou Zhou;Shaofang Fu;Dan Du;Yuehe Lin
中科院分区：
文献类型：
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作者：
Chengzhou Zhu;Yazhou Zhou;Shaofang Fu;Dan Du;Yuehe Lin
对聚合物电解质膜燃料电池（PEMFC）的极大兴趣引发了对更活性和更可靠的氧还原反应（ORR）电催化剂的持续研究。具有更高比表面积和更大孔体积的3D多孔结构受到了极大的关注，其不仅最大化纳米尺寸的电催化剂表面积内的电子转移的可用性，而且还提供反应物到电催化剂的更好的传质。超临界CO2（scCO 2）工艺为新型纳米复合材料的合成和加工提供了一条简洁有效的途径。在此，我们开发了scCO 2技术来合成硼掺杂的3D石墨烯和具有3D多孔纳米结构的低Pt族金属基石墨烯/PtFe。值得注意的是，这些3D纳米复合材料显示出优异的电催化活性和高稳定性的ORR，为PEMFC的发展带来了巨大的希望。
The considerable interest in polymer electrolyte membrane fuel cells (PEMFCs) has sparked a sustained research effort on more active and reliable oxygen reduction reaction (ORR) electrocatalyst. 3D porous architectures featured by higher specific surface areas and larger pore volumes have received great interest, which not only maximize the availability of electron transfer within nanosized electrocatalyst surface area but also provide better mass transport of reactants to the electrocatalyst. Supercritical CO2 (scCO2) process offers an elegant and efficient route for the synthesis and processing of novel nanocomposite materials. Herein, we developed the scCO2 technique to synthesize boron-doped 3D graphene and low Pt group metal-based graphene/PtFe with 3D porous nanostructures. Significantly, these 3D nanocomposites show excellent electrocatalytic activity and high stability for the ORR, holding great promise for the development of PEMFCs.