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

Author(s) Pramanik, M.; Tominaka, S.; Wang, Z.L.; Takei, T.; Yamauchi, Y.
Journal Angew Chem Int Ed Engl
Date Published 2017 Oct 16
Abstract

Mesoporous cobalt phosphide (meso-CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso-Co3 O4 ). 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 Co2 P 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.

DOI 10.1002/anie.201707878
ISSN 1521-3773
Citation Pramanik M, Tominaka S, Wang Z-, Takei T, Yamauchi Y. Mesoporous Semimetallic Conductors: Structural and Electronic Properties of Cobalt Phosphide Systems. Angew Chem Int Ed Engl. 2017;56(43):13508-13512.

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