Synthesis and properties of platinum hydride

Thomas Scheler; Olga Degtyareva; Miriam Marques; Christophe L. Guillaume; John E. Proctor; Shaun Evans; Eugene Gregoryanz

doi:10.1103/PhysRevB.83.214106

Synthesis and properties of platinum hydride

Thomas Scheler^*, Olga Degtyareva, Miriam Marques, Christophe L. Guillaume, John E. Proctor, Shaun Evans, Eugene Gregoryanz

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures reveal the formation of platinum hydride at a pressure of 27(1) GPa at room temperature. This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42 GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that PtH-II is superconducting with T(c) = 12 K at 90 GPa, the highest temperature of superconducting transition among any known metal hydride.

Original language	English
Article number	214106
Number of pages	5
Journal	Physical review B
Volume	83
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.83.214106
Publication status	Published - 9 Jun 2011

Keywords / Materials (for Non-textual outputs)

HIGH-PRESSURE
METAL-HYDRIDES
HYDROGEN
SUPERCONDUCTIVITY
TEMPERATURE
STATE
NITRIDES
EQUATION
CRYSTAL
SYSTEMS

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10.1103/PhysRevB.83.214106

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title = "Synthesis and properties of platinum hydride",

abstract = "Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures reveal the formation of platinum hydride at a pressure of 27(1) GPa at room temperature. This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42 GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that PtH-II is superconducting with T(c) = 12 K at 90 GPa, the highest temperature of superconducting transition among any known metal hydride.",

keywords = "HIGH-PRESSURE, METAL-HYDRIDES, HYDROGEN, SUPERCONDUCTIVITY, TEMPERATURE, STATE, NITRIDES, EQUATION, CRYSTAL, SYSTEMS",

author = "Thomas Scheler and Olga Degtyareva and Miriam Marques and Guillaume, {Christophe L.} and Proctor, {John E.} and Shaun Evans and Eugene Gregoryanz",

year = "2011",

month = jun,

day = "9",

doi = "10.1103/PhysRevB.83.214106",

language = "English",

volume = "83",

journal = "Physical review B",

issn = "1098-0121",

publisher = "American Physical Society",

number = "21",

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TY - JOUR

T1 - Synthesis and properties of platinum hydride

AU - Scheler, Thomas

AU - Degtyareva, Olga

AU - Marques, Miriam

AU - Guillaume, Christophe L.

AU - Proctor, John E.

AU - Evans, Shaun

AU - Gregoryanz, Eugene

PY - 2011/6/9

Y1 - 2011/6/9

N2 - Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures reveal the formation of platinum hydride at a pressure of 27(1) GPa at room temperature. This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42 GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that PtH-II is superconducting with T(c) = 12 K at 90 GPa, the highest temperature of superconducting transition among any known metal hydride.

AB - Synchrotron x-ray diffraction experiments on compressed platinum-hydrogen mixtures reveal the formation of platinum hydride at a pressure of 27(1) GPa at room temperature. This compound exhibits two phases, PtH-I and PtH-II, coexisting up to the pressure of 42 GPa, above which the single phase of PtH-II is observed. Pt atoms in the PtH-II phase are shown to form a hexagonal closed-packed structure. This phase exhibits a high bulk modulus of 310 (10) GPa and is stable up to at least 53 GPa. Ab initio calculations show that PtH-II is superconducting with T(c) = 12 K at 90 GPa, the highest temperature of superconducting transition among any known metal hydride.

KW - HIGH-PRESSURE

KW - METAL-HYDRIDES

KW - HYDROGEN

KW - SUPERCONDUCTIVITY

KW - TEMPERATURE

KW - STATE

KW - NITRIDES

KW - EQUATION

KW - CRYSTAL

KW - SYSTEMS

U2 - 10.1103/PhysRevB.83.214106

DO - 10.1103/PhysRevB.83.214106

M3 - Article

SN - 1098-0121

VL - 83

JO - Physical review B

JF - Physical review B

IS - 21

M1 - 214106

ER -

Synthesis and properties of platinum hydride

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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