Nitrogen-Doped Graphitic Carbon-Supported Ultrafine Co Nanoparticles as an Efficient Multifunctional Electrocatalyst for HER and Rechargeable Zn-Air Batteries

被引：96

作者：

Li, Jinmei ^{[1
,2
]}

Kang, Yumao ^{[3
]}

Liu, Dong ^{[1
,2
]}

Lei, Ziqiang ^{[3
]}

Liu, Peng ^{[1
,2
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Key Lab Nonferrous Met Chem & Resources Utilizat, Coll Chem & Chem Engn, Lanzhou, Peoples R China

[3] Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Gansu Polymer Mat, Key Lab Ecoenvironm Related Polymer Mat,Minist Ed, Lanzhou 730070, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 05期

关键词：

multifunctional electrocatalysts; hydrogen evolution reaction; oxygen reduction reaction; oxygen evolution reaction; Zn-air battery;

D O I：

10.1021/acsami.9b18101

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The construction of high-efficiency electrocatalysts for hydrogen evolution, oxygen reduction, and oxygen evolution reactions (HER/ORR/OER) is critical for the overall water splitting system, fuel cells, and rechargeable metal-air batteries. Here, we report a viable strategy for tuning the size of a Co-based zeolitic imidazolate framework (ZIF). As a result, a nitrogen-doped graphitic carbon-supported ultrafine Co nanoparticle electrocatalyst (Co/NGC-3) with multifunctional activity was developed. Owing to the smaller ZIF-67 polyhedrons with relatively uniform distribution, more effective active sites, and a strong coupling effect of Co-pyridinic-N, the proposed Co/NGC-3 catalyst exhibited an impressive HER activity. It also showed brilliant catalytic activity in both the ORR and OER, delivering a more positive half-wave potential and a lower overpotential than that of the Pt/C catalyst, respectively. Moreover, the Co/NGC-3 involved the Zn-air battery displayed satisfactory power density, excellent energy density, and superior stability. This approach provides an efficient strategy for the preparation of high-performance multifunctional electrocatalysts for energy-related applications.

引用

页码：5717 / 5729

页数：13