Spindle-shaped CeO2/biochar carbon with oxygen-vacancy as an effective and highly durable electrocatalyst for oxygen reduction reaction

被引：44

作者：

Bhuvanendran, Narayanamoorthy ^{[1
]}

Ravichandran, Sabarinathan ^{[1
]}

Kandasamy, Sabariswaran ^{[1
]}

Zhang, Weiqi ^{[1
]}

Xu, Qian ^{[1
]}

Khotseng, Lindiwe ^{[2
]}

Maiyalagan, Thandavarayan ^{[3
]}

Su, Huaneng ^{[1
]}

机构：

[1] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Univ Western Cape, Dept Chem, ZA-7535 Cape Town, South Africa

[3] SRM Inst Sci & Technol, Dept Chem, Kattankulathur 603203, Tamil Nadu, India

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 02期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Spirulina platensis microalgae; Spindle-shaped CeO2; N; P-Carbon; Oxygen reduction reaction; Stability; NITROGEN-DOPED GRAPHENE; POROUS CARBON; ELECTROCHEMICAL PROPERTIES; METHANOL OXIDATION; FUEL-CELLS; CEO2; CERIA; CO; CATALYST; NANOPARTICLES;

D O I：

10.1016/j.ijhydene.2020.10.115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly durable and active CeO2 on biochar carbon (CeO2/BC) derived from Spirulina platensis microalgae and synthesized by simple one-pot hydrothermal treatment and further activated through pyrolysis approach. A spindle-shaped morphology of CeO2 with predominant (111) facet was evidently observed from X-ray diffraction patterns and electron microscopy images. The structural features such as high specific surface area, defect-rich carbon with N & P atoms, increased oxygen vacancy and p-electron transfer play an important role for the improved oxygen reduction reaction (ORR). The considerable amount of Ce3+ and higher proportion of pyridinic N and graphitic N species are substantially contributed to the superior ORR performance of CeO2/BC700, which surpasses other similar catalysts and competing with Pt/C. Hence, the significant kinetic ORR parameters and extended stability (no loss after 5000 potential cycles) of the CeO2/BC700 catalysts provides the promising insight to develop the rare-earth metal oxide nanostructures as a possible candidate for ORR in alkaline medium. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：2128 / 2142

页数：15

共 70 条

[1] Ceria-based electrolytes prepared by solution combustion synthesis: The role of fuel on the materials properties [J].