二维ZIF-L衍生的叶片状Fe-NC材料的制备及其氧还原催化性能研究

doi:10.19964/j.issn.1006-4990.2021-0203

无机盐工业 ›› 2021, Vol. 53 ›› Issue (6): 1-7.doi: 10.19964/j.issn.1006-4990.2021-0203

• 无机新型材料——能源存储与转换 • 下一篇

二维ZIF-L衍生的叶片状Fe-NC材料的制备及其氧还原催化性能研究

叶谢维伊(),郑志平,匡勤()

厦门大学化学化工学院化学系,福建厦门 361005

收稿日期:2021-03-31 出版日期:2021-06-10 发布日期:2021-07-08
作者简介:叶谢维伊（1996— ）,女,硕士研究生,研究方向为ZIFs衍生复合纳米材料的制备及其氧还原性能研究;E-mail： 741997049@qq.com。
基金资助:
国家重点研发计划(2017YFA0206500);国家自然科学基金(22071202)

Preparation of 2D leaf-like Fe-NC materials derived from ZIF-L and study on their oxygen reduction catalytic performance

Ye Xieweiyi(),Zheng Zhiping,Kuang Qin()

Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China

Received:2021-03-31 Published:2021-06-10 Online:2021-07-08

摘要/Abstract

摘要：

将柠檬酸铁铵作为Fe源掺入叶片状ZIF-L前驱体中,经过分段式高温热解成功制备出形貌维持良好的二维片状的Fe-NC催化剂。通过探究Fe载量对催化性质的影响发现,Fe-NC-1%催化剂在碱性电解质中呈现出最为优异的氧还原反应（ORR）活性,半波电位E_1/2达到了0.897 V,动力学电流密度J_{0.85 V}为26.70 mA/cm²,5 000次循环过后E_1/2衰减5 mV,均超过了商业Pt/C催化剂。结合Raman光谱、XPS、BET法比表面积测定等分析表明,Fe-NC-1%的大比表面积、高石墨化程度、丰富的含氮活性物种等优势赋予了较高的传质效率及催化活性位点利用率,是促进其ORR反应动力学的重要因素。

关键词: 氧还原反应, ZIF-L, 氮掺杂碳, 铁基催化剂

Abstract:

Ammonium ferric citrate was used as the Fe source to be incorporated into the leaf like ZIF-L precursor,and the two-dimensional flake Fe-NC catalyst with good morphology was successfully prepared by stepwise pyrolysis.By optimizing Fe content in the precursors,the Fe-NC-1% catalyst was found to exhibit outstanding oxygen reduction reaction（ORR） per-formance in alkaline electrolytes,with the half-wave potential（E_1/2） of 0.897 V,kinetic current density（J_{0.85 V}） of 26.70 mA/cm²and Δ E_1/2 reducing 5 mV after 5 000 cycles,which were all better than those of commercial Pt/C catalyst.The results combining with Raman spectrum,XPS and BET（specific surface area） method showed that the large specific surface area,high graphitization degree,and abundant N-containing active species of Fe-NC-1% led to the high mass transfer efficiency and utilization rate of catalytic active sites,which was an important factor to promote the ORR reaction kinetics.

Key words: oxygen reduction reaction, ZIF-L, N-doped carbon, Fe-based catalysts

中图分类号:

TQ138.11

叶谢维伊,郑志平,匡勤. 二维ZIF-L衍生的叶片状Fe-NC材料的制备及其氧还原催化性能研究[J]. 无机盐工业, 2021, 53(6): 1-7.

Ye Xieweiyi,Zheng Zhiping,Kuang Qin. Preparation of 2D leaf-like Fe-NC materials derived from ZIF-L and study on their oxygen reduction catalytic performance[J]. Inorganic Chemicals Industry, 2021, 53(6): 1-7.

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二维ZIF-L衍生的叶片状Fe-NC材料的制备及其氧还原催化性能研究

Preparation of 2D leaf-like Fe-NC materials derived from ZIF-L and study on their oxygen reduction catalytic performance

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二维ZIF-L衍生的叶片状Fe-NC材料的制备及其氧还原催化性能研究

Preparation of 2D leaf-like Fe-NC materials derived from ZIF-L and study on their oxygen reduction catalytic performance

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