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

Mesoporous cobalt phosphide (meso‐CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso‐CoO). The electrical conductivity of meso‐CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV a... Full description

Journal Title: Angewandte Chemie 16 October 2017, Vol.129(43), pp.13693-13697
Main Author: Pramanik, Malay
Other Authors: Tominaka, Satoshi , Wang, Zhong‐Li , Takei, Toshiaki , Yamauchi, Yusuke
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0044-8249 ; E-ISSN: 1521-3757 ; DOI: 10.1002/ange.201707878
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recordid: wj10.1002/ange.201707878
title: Mesoporous Semimetallic Conductors: Structural and Electronic Properties of Cobalt Phosphide Systems
format: Article
creator:
  • Pramanik, Malay
  • Tominaka, Satoshi
  • Wang, Zhong‐Li
  • Takei, Toshiaki
  • Yamauchi, Yusuke
subjects:
  • Cobaltphosphide
  • Elektrische Leitfähigkeit
  • Kristallinität
  • Mesoporöse Materialien
  • Metallphosphide
ispartof: Angewandte Chemie, 16 October 2017, Vol.129(43), pp.13693-13697
description: Mesoporous cobalt phosphide (meso‐CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso‐CoO). The electrical conductivity of meso‐CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV at temperatures below 296 K. 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 CoP 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. von geordnetem mesoporösem Cobaltoxid wurde mesoporöses Cobaltphosphid erhalten. Seine elektrische Leitfähigkeit ist 37‐mal höher als die von nicht porösem CoP, und es zeigt halbmetallisches Verhalten mit einer sehr geringen Aktivierungsenergie von 26 meV unterhalb von 296 K. Diese Eigenschaften wurden auf die Koexistenz nanokristalliner CoP‐Phasen zurückgeführt.
language: eng
source:
identifier: ISSN: 0044-8249 ; E-ISSN: 1521-3757 ; DOI: 10.1002/ange.201707878
fulltext: fulltext
issn:
  • 0044-8249
  • 00448249
  • 1521-3757
  • 15213757
url: Link


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titleMesoporous Semimetallic Conductors: Structural and Electronic Properties of Cobalt Phosphide Systems
creatorPramanik, Malay ; Tominaka, Satoshi ; Wang, Zhong‐Li ; Takei, Toshiaki ; Yamauchi, Yusuke
ispartofAngewandte Chemie, 16 October 2017, Vol.129(43), pp.13693-13697
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subjectCobaltphosphide ; Elektrische Leitfähigkeit ; Kristallinität ; Mesoporöse Materialien ; Metallphosphide
descriptionMesoporous cobalt phosphide (meso‐CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso‐CoO). The electrical conductivity of meso‐CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV at temperatures below 296 K. 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 CoP 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. von geordnetem mesoporösem Cobaltoxid wurde mesoporöses Cobaltphosphid erhalten. Seine elektrische Leitfähigkeit ist 37‐mal höher als die von nicht porösem CoP, und es zeigt halbmetallisches Verhalten mit einer sehr geringen Aktivierungsenergie von 26 meV unterhalb von 296 K. Diese Eigenschaften wurden auf die Koexistenz nanokristalliner CoP‐Phasen zurückgeführt.
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descriptionMesoporous cobalt phosphide (meso‐CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso‐CoO). The electrical conductivity of meso‐CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV at temperatures below 296 K. 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 CoP 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. von geordnetem mesoporösem Cobaltoxid wurde mesoporöses Cobaltphosphid erhalten. Seine elektrische Leitfähigkeit ist 37‐mal höher als die von nicht porösem CoP, und es zeigt halbmetallisches Verhalten mit einer sehr geringen Aktivierungsenergie von 26 meV unterhalb von 296 K. Diese Eigenschaften wurden auf die Koexistenz nanokristalliner CoP‐Phasen zurückgeführt.
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abstractMesoporous cobalt phosphide (meso‐CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso‐CoO). The electrical conductivity of meso‐CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV at temperatures below 296 K. 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 CoP 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. von geordnetem mesoporösem Cobaltoxid wurde mesoporöses Cobaltphosphid erhalten. Seine elektrische Leitfähigkeit ist 37‐mal höher als die von nicht porösem CoP, und es zeigt halbmetallisches Verhalten mit einer sehr geringen Aktivierungsenergie von 26 meV unterhalb von 296 K. Diese Eigenschaften wurden auf die Koexistenz nanokristalliner CoP‐Phasen zurückgeführt.
doi10.1002/ange.201707878
pages13693-13697
date2017-10-16