Crystalline/Amorphous Co2P@FePO4 Core/Shell Nanoheterostructures Supported on Porous Carbon Microspheres as Efficient Oxygen Reduction Electrocatalysts

被引：44

作者：

Cheng, Dan ^{[1
]}

Wang, Zhe ^{[1
]}

Chen, Chang ^{[1
]}

Zhou, Kebin ^{[1
]}

机构：

[1] Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Sch Chem Sci, Beijing 100049, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2019年 / 31卷 / 19期

基金：

中国国家自然科学基金;

关键词：

INTERCONNECTED SUPER-MACROPORES; PHYTIC ACID; PHASE-TRANSFORMATION; AIR BATTERIES; CATALYSTS; ALKALINE; NANOPARTICLES; PHOSPHATE; CORE;

D O I：

10.1021/acs.chemmater.9b02436

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：

Nanostructures with metallic crystalline cores and amorphous shells are recognized as promising catalysts for oxygen reduction (ORR) to enhance intrinsic activity and electro-conductivity through strong interfacial interactions. Herein, a novel strategy involving crystallinity and nanostructure engineering is developed for constructing the amorphous ferric phosphate shell and the embedded crystalline Co2P core on three-dimensional interconnected carbon skeleton microspheres (Co2P@am-FePO4). Due to the excellent intrinsic activity and the enhanced electroconductivity from the strong electronic interactions between the amorphous ferric phosphate shell and crystalline Co2P core, the Co2P @am-FePO4 catalysts exhibit an excellent oxygen reduction electrocatalytic activity with a half wave potential as low as 0.91 V. More importantly, such excellent ORR performance can also translate to a high Zn-air performance as evidenced by a high specific energy density of 923 Wh/kg(zn) and maximum discharge power density of 152 mW/cm(2).

引用

页码：8026 / 8034

页数：9

共 49 条

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