Abstract

Design of non-noble metal-based nanocatalysts supported on N-doped porous carbon is very important for electrocatalytic applications. Herein, we propose a new transition metal nitrides (TMNs) catalyst through an in-situ synthesis, in which WN and Ni nanoparticles (NPs) are uniformly anchored in N-doped ordered porous carbon (WN–Ni/NPC). N-doped porous carbon with high surface area favors electrolyte infiltration and reactants diffusion, and its three-dimensional (3D) conductive network offers fast electron transport. Moreover, doping of N element together with uniformly distributed NPs further enhance the catalytic activity towards oxygen reduction reaction (ORR). Benefiting from the above superiorities and synergistic effect between the WN and Ni NPs, the WN–Ni/NPC shows good catalytic performance for ORR in alkaline media. The present synthetic method is highly valuable for designing N-doped porous carbon supported TMNs-based catalysts.

中文翻译：

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掺有WN和Ni纳米粒子的N掺杂有序多孔碳，可增强电催化性能

摘要

N掺杂多孔碳上负载的非贵金属基纳米催化剂的设计对于电催化应用非常重要。本文中，我们通过原位合成提出了一种新型的过渡金属氮化物（TMNs）催化剂，其中WN和Ni纳米颗粒（NPs）均匀地锚固在N掺杂有序多孔碳（WN–Ni / NPC）中。具有高表面积的N掺杂多孔碳有利于电解质渗透和反应物扩散，并且其三维（3D）导电网络可提供快速的电子传输。而且，N元素与均匀分布的NP一起掺杂进一步增强了对氧还原反应（ORR）的催化活性。受益于WN和Ni NP之间的上述优势和协同效应，WN–Ni / NPC在碱性介质中对ORR表现出良好的催化性能。