Preparation and modification of ZIF-67 derived Co/NC porous carbon composite for electrocatalytic oxygen evolution reaction

被引：0

作者：

Zou L. ^{[1
]}

Liu G. ^{[1
,2
]}

Jiang M. ^{[1
]}

Yang Z. ^{[1
]}

Zhang W. ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, Anhui

[2] School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, Anhui

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 06期

关键词：

Composite; NaBH[!sub]4[!/sub; Oxygen vacancy; Porous carbon; Pyrolysis; Reduction; Water oxidation; ZIF-67;

D O I：

10.11949/0438-1157.20191040

中图分类号：

学科分类号：

摘要：

A porous carbon composite (R-Co / NC-800) with oxygen vacancies on its surface was prepared by pyrolyzing the precursor ZIF-67 at high temperature and using NaBH4 reduction. The structure, morphology, element distribution and valence state of the as-prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM) and X-ray photoelectron spectroscope (XPS), respectively. The electrocatalytic performance of the as-prepared catalysts for oxygen evolution reaction (OER) was investigated by linear polarization curve (LSV) measurements. The R-Co/NC-800 with rich oxygen vacancies as electrocatalytic active sites and high specific surface area to expose amounts of unsaturated coordinate metal species after reconstruction the surface of Co/NC-800 via NaBH4 solution, which exhibits higher catalytic activity for OER, delivering a current density of 10 mA/cm2 at a low overpotential (287 mV) than that of Co/NC-800 (363 mV) in 1.0 mol/L KOH media, as well as outstanding long-term electrochemical durability. © All Right Reserved.

引用

页码：2821 / 2829

页数：8

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