Strong Negative Thermal Expansion in a Low-Cost and Facile Oxide of Cu2P2O7

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Naike Shi
  • Andrea Sanson
  • Qilong Gao
  • Qiang Sun
  • Qingzhen Huang
  • Danilo Oliveira de Souza
  • Xianran Xing
  • Jun Chen

Detail(s)

Original languageEnglish
Pages (from-to)3088-3093
Journal / PublicationJournal of the American Chemical Society
Volume142
Issue number6
Online published17 Jan 2020
Publication statusPublished - 12 Feb 2020
Externally publishedYes

Abstract

Negative thermal expansion (NTE) behaviors have been observed in various types of compounds. The achievement in the merits of promising low-cost and facile NTE oxides remains challenging. In the present work, a simple and low-cost Cu2P2O7 has been found to exhibit the strongest NTE among the oxides (αV ∼ -27.69 × 10-6 K-1, 5-375 K). The complex NTE mechanism has been investigated by the combined methods of high-resolution synchrotron X-ray diffraction, neutron powder diffraction, X-ray pair distribution function, extended X-ray absorption fine structure spectroscopy, and density functional theory calculations. Interesting, the direct experimental evidence reveals that the coupling twist and rotation of PO4 and CuO5 polyhedra are the inherent factors for the NTE nature of Cu2P2O7, which is triggered by the transverse vibrations of oxygen atoms. The present new NTE material of Cu2P2O7 also has been verified for the practical application.

Citation Format(s)

Strong Negative Thermal Expansion in a Low-Cost and Facile Oxide of Cu2P2O7. / Shi, Naike; Sanson, Andrea; Gao, Qilong; Sun, Qiang; Ren, Yang; Huang, Qingzhen; de Souza, Danilo Oliveira; Xing, Xianran; Chen, Jun.

In: Journal of the American Chemical Society, Vol. 142, No. 6, 12.02.2020, p. 3088-3093.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review