Porous Iron- and Cobalt-based Single Crystals with Enhanced Electrocatalysis Performance
张飞燕,谢奎
a (College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China)
b (Key Laboratory of Design & Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
Porous Iron- and Cobalt-based Single Crystals with Enhanced Electrocatalysis Performance
ZHANG Fei-Yan;XIE Kui
a (College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China)
b (Key Laboratory of Design & Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
摘要Porous single crystals have the characteristics of long-range ordering structure and large specific surface area, which will significantly enhance their electrochemical performance. Here, we report a method different from the conventional porous single crystal growth method. This method is to directly convert single crystal precursors Co3O4 and Fe3O4 into Co2N and Fe2N, and then further reduces them to porous single crystals Co and Fe particles under H2/Ar atmosphere. The removal of O2– in the lattice channel at the pressure of 25～300 torr and the temperature of 300～600 C will promote nitridation of the single-crystalline Co–O and Fe–O frames, and further remove N3– in H2/Ar atmosphere and recrystallize as Co and Fe. These porous single crystals exhibit enhanced electrochemical properties due to their structural coherence and highly active surface. We demonstrated that the aminobenzene yield was up to 91% and the selectivity reached 92% in the electrochemical reduction of nitrobenzene.
Abstract：Porous single crystals have the characteristics of long-range ordering structure and large specific surface area, which will significantly enhance their electrochemical performance. Here, we report a method different from the conventional porous single crystal growth method. This method is to directly convert single crystal precursors Co3O4 and Fe3O4 into Co2N and Fe2N, and then further reduces them to porous single crystals Co and Fe particles under H2/Ar atmosphere. The removal of O2– in the lattice channel at the pressure of 25～300 torr and the temperature of 300～600 C will promote nitridation of the single-crystalline Co–O and Fe–O frames, and further remove N3– in H2/Ar atmosphere and recrystallize as Co and Fe. These porous single crystals exhibit enhanced electrochemical properties due to their structural coherence and highly active surface. We demonstrated that the aminobenzene yield was up to 91% and the selectivity reached 92% in the electrochemical reduction of nitrobenzene.
基金资助:This project was supported by the Natural Science Foundation of China (91845202, 21750110433), Dalian National Laboratory for Clean Energy (DNL180404) and Strategic Priority Research Program of Chinese Academy of Sciences (XDB2000000)
通讯作者:
kxie@fjirsm.ac.cn
E-mail: kxie@fjirsm.ac.cn
引用本文:
张飞燕 谢奎. Porous Iron- and Cobalt-based Single Crystals with Enhanced Electrocatalysis Performance[J]. 结构化学, 2021, 40(1): 61-69.
ZHANG Fei-Yan;XIE Kui. Porous Iron- and Cobalt-based Single Crystals with Enhanced Electrocatalysis Performance. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2021, 40(1): 61-69.
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