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General Method for Synthesis Transition‐Metal Phosphide/Nitrogen and Phosphide Doped Carbon Materials with Yolk‐Shell Structure for Oxygen Reduction Reaction
ChemCatChem ( IF 3.8 ) Pub Date : 2019-02-20 , DOI: 10.1002/cctc.201801935
Yue Yu 1 , Jun Ma 1 , Changli Chen 1 , Yuanyuan Fu 1 , Yefei Wang 1 , Kai Li 1 , Yi Liao 1 , Lirong Zheng 2 , Xia Zuo 1
Affiliation  

The transition metal phosphides have gradually emerged as promising electrocatalysts candidate for oxygen reduction reaction in recent years. As a research hotspot of transition metal phosphides, exploring their mechanism of catalytic activity and the influence of unique morphology is of great significance. In this study, a series of yolk‐shell structure catalysts are fabricated only by pyrolyzing cyclophosphazene microspheres and metal salt without using any other templates, which M2P (M=Fe, Co, Ni) act as the core and N, P co‐doped carbon as the shell. The yolk‐shell structures aim to overcome the inferior conductivity and aggregation problems traditionally existed in application of transition metal phosphides through combination of transition metal phosphides and doped carbon materials. The prepared Fe2P/NPC, Co2P/NPC and Ni2P/NPC catalysts exhibit excellent ORR catalytic activity through the four‐electron pathway, together with large electrochemically active surface area, superior stability and admiring methanol tolerance.

中文翻译:

合成具有卵黄壳结构的过渡金属磷/氮和磷掺杂碳材料进行氧还原反应的通用方法

近年来,过渡金属磷化物逐渐成为有希望的用于氧还原反应的电催化剂候选物。作为过渡金属磷化物的研究热点,探索其催化活性机理和独特形貌的影响具有重要意义。在这项研究中,仅通过热解环磷腈微球和金属盐而不使用任何其他模板(M 2 P(M = Fe,Co,Ni)作为核心,N,P co掺杂碳作为外壳。卵黄壳结构旨在通过过渡金属磷化物和掺杂碳材料的结合来克服传统上在过渡金属磷化物应用中存在的劣质电导率和聚集问题。准备好的铁2 P / NPC,Co 2 P / NPC和Ni 2 P / NPC催化剂通过四电子途径具有出色的ORR催化活性,并具有大的电化学活性表面积,优异的稳定性和令人钦佩的甲醇耐受性。
更新日期:2019-02-20
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