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Fabricating Pt-decorated three dimensional N-doped carbon porous microspherical cavity catalyst for advanced oxygen reduction reaction
Carbon ( IF 10.9 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.carbon.2017.10.102
Yaru Cheng , Huiting Lu , Kai Zhang , Fan Yang , Wenhao Dai , Conghui Liu , Haifeng Dong , Xueji Zhang

Abstract Abundant and low-cost materials with high electrochemical catalytic activity for oxygen reduction reaction (ORR) are in urgent demand for energy storage and conversion devices. In this work, an advanced ORR electrocatalyst of Pt-decorated three dimensional (3D) N -doped carbon porous microspherical cavity (Pt N/C PMC) was fabricated by using polystyrene microspheres (PS) as template, and dopamine and K 2 PtCl 6 as precursors. Microscopic and spectroscopic characterizations revealed large surface area available and affluent pore structures were observed in the resulted Pt N/C PMCs, and numerous Pt nanoparticles (NPs) with active (111) facet were decorated on the surface of N/C PMCs. The proposed Pt N/C CMCs presented good onset potential, remarkable mass activity (MA) and specific activity (SA), superb methanol tolerance and excellent durability toward ORR in alkaline solutions. The numerous decorated Pt with high active (111) facet coupled with high content of active pyridinic and graphitic nitrogen synergistically contributed to the enhanced ORR activity, while the unique 3D porous structures facilitated O 2 and electrolyte transport during the ORR process. This work may open new avenue for designing advanced and cost-effective Pt-based ORR catalyst.

中文翻译:

制备用于高级氧还原反应的 Pt 修饰的三维 N 掺杂碳多孔微球腔催化剂

摘要 具有高电化学催化活性氧还原反应(ORR)的丰富且低成本的材料是能量存储和转换装置的迫切需求。在这项工作中,以聚苯乙烯微球 (PS) 为模板,多巴胺和 K 2 PtCl 6 制备了一种先进的 Pt 装饰的三维 (3D) N 掺杂碳多孔微球腔 (Pt N/C PMC) 的 ORR 电催化剂。作为先驱。显微和光谱表征显示,在所得 Pt N/C PMC 中观察到大的可用表面积和丰富的孔结构,并且在 N/C PMC 的表面上装饰了许多具有活性(111)面的 Pt 纳米粒子(NP)。提议的 Pt N/C CMC 具有良好的起始潜力、显着的质量活度 (MA) 和比活度 (SA),出色的甲醇耐受性和对碱性溶液中 ORR 的出色耐久性。大量具有高活性 (111) 面的装饰 Pt 加上高含量的活性吡啶和石墨氮协同促进了 ORR 活性的增强,而独特的 3D 多孔结构促进了 ORR 过程中 O 2 和电解质的传输。这项工作可能为设计先进且具有成本效益的 Pt 基 ORR 催化剂开辟新途径。
更新日期:2018-03-01
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