Topochemical Reaction of Exfoliated Layered Cobalt(II) Hydroxide for the Synthesis of Ultrapure Co3O4 as an Oxygen Reduction Catalyst

被引：12

作者：

Lee, Hyung Tae ^{[1
]}

Kwon, Sunglun ^{[1
]}

Youn, Chul Min ^{[2
]}

Choi, Taekjib ^{[2
]}

Lee, Jong Hyeon ^{[1
]}

机构：

[1] Catholic Univ Korea, Dept Chem, Bucheon 420743, Gyeonggi, South Korea

[2] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 143747, South Korea

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2017年 / 15期

基金：

新加坡国家研究基金会;

关键词：

Liquid exfoliation; Layered compounds; Cobalt; Electrochemistry; Oxygen reduction reaction; Nanostructures; METHANE COMBUSTION; HIGHLY EFFICIENT; AIR-BATTERIES; NANOSHEETS; ELECTROCATALYSTS; NANOPARTICLES; PERFORMANCE; GRAPHENE; FILMS; SUPERCAPACITORS;

D O I：

10.1002/ejic.201601527

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The liquid exfoliation of hydrotalcite-like alpha-Co(OH)(2) in formamide produced a new pink beta-form of Co(OH)(2) nanosheets [Ex-NS-Co(OH)(2)] with unique nanoscopic properties: a larger surface area of active hydroxides and a much narrower oxidation-reduction potential for the Co2+ ions in the hydroxide layer than those of the bulk alpha-Co(OH)(2). These unprecedented properties of Ex-NS-Co(OH)(2) were applied to the topochemical synthesis of crystalline Co3O4 nanocubes (NCs) with clear edges and no impurity phases from an aqueous solution of Co2+ ions at 70 degrees C. A Co3O4 NC/C catalyst exhibited good catalytic activity for the oxygen reduction reaction (ORR) and higher stability under a continuous electrochemical operation than that of commercial Pt/C.

引用

页码：2184 / 2189

页数：6

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