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首页> 外文期刊>Catalysis science & technology >A high-performance Fe and nitrogen doped catalyst derived from diazoniapentaphene salt and phenolic resin mixture for oxygen reduction reaction
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A high-performance Fe and nitrogen doped catalyst derived from diazoniapentaphene salt and phenolic resin mixture for oxygen reduction reaction

机译：源自重氧二苯盐和酚类树脂混合物的高性能Fe和氮掺杂催化剂，用于氧还原反应

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摘要

A high-performance ORR catalyst has been synthesised by pyrolysis of quaternary nitrogen-containing 4a,8a-diazoniapentaphene dibromide (DAP), phenolic resin and FeBr2 mixture. The catalyst (Fe/DAP) was characterized by XPS, SEM and TEM analysis. The ORR activity was studied using rotating ring-disk electrode voltammetry (RRDE) and the onset potential of ORR was found to be 0.95 V vs. RHE in 0.5 M H2SO4 solution, which is very close to that of the state-of-the-art Pt/C catalyst. The stability of the catalyst was studied using LD and SSD tests and found to be highly stable even after 11 110 potential-steps in the LD test. The kinetic and mechanistic analyses of the ORR on the catalyst indicate that the ORR, as a whole, follows a 4-electron (parallel) pathway. The relative changes in the nitrogen content after the durability test was estimated using N 1s XPS spectra which may be associated with the activity loss after the durability test. The loss of ORR activity was observed after the acid washing of the catalyst which suggests the role of Fe in the direct 4-electron reduction of O-2.
机译：高性能ORR催化剂通过热解的含氮，含氮4a，8a-二二苯二酚二溴化苯二溴化物（DAP），酚醛树脂和Febr2混合物合成。催化剂（Fe/DAP）的特征是XPS，SEM和TEM分析。使用旋转环电极伏安法（RRDE）研究了ORR活性，发现ORR的发作电位为0.95 V，而在0.5 m H2SO4溶液中的RHE与RHE相比，它非常接近最新的。 ART PT/C催化剂。使用LD和SSD测试对催化剂的稳定性进行了研究，即使在LD测试中有110个潜在步骤之后，也发现高度稳定。 ORR在催化剂上的动力学和机械分析表明，总体上，ORR遵循4电子（平行）途径。使用N 1S XPS光谱估算耐久性测试后氮含量的相对变化，这可能与耐用性测试后的活性损失有关。催化催化剂后观察到ORR活性的丧失，这表明Fe在直接4电子降低O-2中的作用。

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