Chisholm, Calum R. I. and Merle, Ryan B. and Boysen, Dane A. and Haile, Sossina M. (2002) Superprotonic Phase Transition in CsH(PO_3H). Chemistry of Materials, 14 (9). pp. 3889-3893. ISSN 0897-4756. doi:10.1021/cm020297v. https://resolver.caltech.edu/CaltechAUTHORS:20131125-162531441
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20131125-162531441
Abstract
High-temperature investigations of the compound CsH(PO₃H) (or CsH₂PO₃, cesium hydrogen phosphite) revealed that this material undergoes a transition, with an onset of 137 °C, to a phase of high proton conductivity. The transition is accompanied by a large heat of transformation, ΔH = 58 ± 2 J/g (12.4 ± 0.4 kJ/mol), and exhibits measurable hysteresis, occurring at 96 °C upon cooling. High-temperature X-ray powder diffraction showed that the high-temperature phase is cubic, with a₀ = 4.896(1)Å, and likely takes on a CsCl structure, with Cs atoms at the corners of a simple cubic unit cell, and PO₃H groups at the center. The conductivity in the high-temperature phase at 160 °C is 5.5 × 10⁻³ Ω⁻¹ cm⁻¹, and the activation energy for proton transport is 0.40 ± 0.01 eV. These values suggest that proton transport is facilitated by rapid PO₃H group reorientations in the cubic phase of CsH(PO₃H), as is known to occur in the high-temperature, tetragonal phase of CsHSO₄.
Item Type: | Article | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| |||||||||
ORCID: |
| |||||||||
Alternate Title: | Superprotonic Phase Transition in CsH(PO3H) | |||||||||
Additional Information: | Copyright © 2002 American Chemical Society. Received March 27, 2002. Revised Manuscript Received June 19, 2002. Publication Date (Web): August 23, 2002. CM020297V. We are pleased to acknowledge the financial support of the National Science Foundation. Additional funding was provided by the Irvine Foundation. | |||||||||
Funders: |
| |||||||||
Subject Keywords: | conductivity CsHsO4 crystals | |||||||||
Issue or Number: | 9 | |||||||||
DOI: | 10.1021/cm020297v | |||||||||
Record Number: | CaltechAUTHORS:20131125-162531441 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20131125-162531441 | |||||||||
Official Citation: | Superprotonic Phase Transition in CsH(PO3H). Calum R. I. Chisholm,Ryan B. Merle,Dane A. Boysen, and, and Sossina M. Haile. Chemistry of Materials 2002 14 (9), 3889-3893. | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 42713 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Jonathan Gross | |||||||||
Deposited On: | 27 Nov 2013 20:10 | |||||||||
Last Modified: | 10 Nov 2021 16:27 |
Repository Staff Only: item control page