Mesoporous Semimetallic Conductors: Structural and Electronic Properties of Cobalt Phosphide Systems

被引：45

作者：

Pramanik, Malay ^{[1
]}

Tominaka, Satoshi ^{[1
]}

Wang, Zhong-Li ^{[1
]}

Takei, Toshiaki ^{[1
]}

Yamauchi, Yusuke ^{[1
,2
,3
,4
]}

机构：

[1] NIMS, Int Ctr Mat Nanoarchitecton MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[2] Univ Wollongong, Squires Way, North Wollongong, NSW 2500, Australia

[3] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

[4] Univ Queensland, AIBN, Brisbane, Qld 4072, Australia

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2017年 / 56卷 / 43期

基金：

澳大利亚研究理事会;

关键词：

cobalt phosphides; crystallinity; electrical conductivity; mesoporous materials; metal phosphides; HYDROGEN EVOLUTION REACTION; CARBON NANOTUBES; ELECTRICAL-CONDUCTIVITY; OXYGEN EVOLUTION; WATER OXIDATION; ELECTROCATALYSTS; NANOPARTICLES; FRAMEWORKS; REDUCTION; CATALYSTS;

D O I：

10.1002/anie.201707878

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mesoporous cobalt phosphide (meso-CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso-Co3O4). The electrical conductivity of meso-CoP is 37times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26meV at temperatures below 296K. Above this temperature, only materials with mesopores underwent a change in conductivity from semimetallic to semiconducting behavior. These properties were attributed to the coexistence of nanocrystalline Co2P phases. The poor crystallinity of mesoporous materials has often been considered to be a problem but this example clearly shows its positive aspects. The concept introduced here should thus lead to new routes for the synthesis of materials with high electronic conductivity.

引用

页码：13508 / 13512

页数：5