JOURNAL ARTICLE

Nitrogen–sulfur co‐doped porous carbon derived from asphalt as efficient catalyst for oxygen reduction

Jing-Sheng MaMingzai WuLingxin ChenLixing ZhangYing Xiong

Year: 2023 Journal:   Rare Metals Vol: 43 (1)Pages: 380-388   Publisher: Springer Science+Business Media

Abstract

摘要 沥青作为一种环保、低成本的石化副产品, 在制备性能优异、稳定性突出的无金属氧还原电催化剂方面具有巨大潜力。本文以柠檬酸钾为溶胀剂, 通过简单的活化方法将沥青转化为多孔碳纳米片。然后采用有效的杂原子掺杂方法制备了氮硫共掺杂多孔碳纳米片 (NS‐PCN) 作为ORR电催化剂。在ORR反应过程中, 碳纳米片表现出优异的活性, 正半波电位较高, 为0.831 V, Tafel斜率仅为64.8 mV dec‐1, 这是由于多孔碳丰富的比表面积和暴露的活性位点数量的增加引起的快速电子传输, 以及氮和硫的引入使缺陷密度富集.与Pt/C基锌空气电池相比, 组装的液态锌空气电池在碱性条件下也表现出更高的放电功率和稳定性。综上所述, 本研究不仅为简单开发高性价比的无金属ORR电催化剂提供了新的思路, 而且为工业沥青的可持续应用提供了新的思路。

Keywords:
Materials science Sulfur Catalysis Carbon fibers Porosity Oxygen Nitrogen Asphalt Chemical engineering Oxygen reduction reaction Doping Inorganic chemistry Composite material Organic chemistry Metallurgy Chemistry Optoelectronics Physical chemistry Electrochemistry

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Topics

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