Platinum Deposited Nitrogen-Doped Vertically Aligned Carbon Nanofibers as Methanol Tolerant Catalyst for Oxygen Reduction Reaction with Improved Durability
Platinum Deposited Nitrogen-Doped Vertically Aligned Carbon Nanofibers as Methanol Tolerant Catalyst for Oxygen Reduction Reaction with Improved Durability
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DOI：
10.3390/applnano2040022
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
Ayyappan Elangovan;Jiayi Xu;Archana Sekar;Sabari Rajendran;Bin-Hong Liu;Jun Li
中科院分区：
文献类型：
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作者：
Ayyappan Elangovan;Jiayi Xu;Archana Sekar;Sabari Rajendran;Bin-Hong Liu;Jun Li
碳材料中的氮掺杂可以改变所用碳材料的电子和结构特性，这有助于产生更强的金属-载体相互作用。在这项研究中，探讨了氮掺杂在提高三维垂直排列碳纳米纤维（VACNF）阵列上负载的铂催化剂对氧还原反应（ORR）的耐久性方面的作用。 N-VACNF 中存在的氮部分增强了金属-载体相互作用，并有助于将 Pt 粒径从 3.1 nm 减小到 2.3 nm。与具有相似 Pt 负载量的 Pt/VACNF 和 Pt/C 催化剂相比，Pt/N-VACNF 催化剂表现出更好的耐用性。 DFT 计算验证了 Pt NP 的耐久性随着吡啶 N 的增加而增加，并证实了 Pt/N-VACNF 的分子 ORR 途径。此外，Pt/N-VACNF 催化剂被发现对甲醇渗透具有优异的耐受性。
Nitrogen doping in carbon materials can modify the employed carbon material’s electronic and structural properties, which helps in creating a stronger metal-support interaction. In this study, the role of nitrogen doping in improving the durability of Pt catalysts supported on a three-dimensional vertically aligned carbon nanofiber (VACNF) array towards oxygen reduction reaction (ORR) was explored. The nitrogen moieties present in the N-VACNF enhanced the metal-support interaction and contributed to a reduction in the Pt particle size from 3.1 nm to 2.3 nm. The Pt/N-VACNF catalyst showed better durability when compared to Pt/VACNF and Pt/C catalysts with similar Pt loading. DFT calculations validated the increase in the durability of the Pt NPs with an increase in pyridinic N and corroborated the molecular ORR pathway for Pt/N-VACNF. Moreover, the Pt/N-VACNF catalyst was found to have excellent tolerance towards methanol crossover.