Synthesis of Gold Hydride at High Pressure and High Temperature
Abstract
Abstract Gold is an unreactive metal and its chemical interactions with hydrogen have only recently been explored. Here, we report the formation of gold hydride above 40 GPa and 2200 K in X‐ray free electron laser heated diamond anvil cells using various hydrocarbons as hydrogen sources. Above 40 GPa, a hexagonal phase emerges close to the gold melting point, corresponding to a hydride with stoichiometry , with increasing from 0 to near 1 with pressure from 40 to 80 GPa. This is a high‐temperature phase which reverts to face centered cubic gold on cooling to 295 K. Accompanying DFT‐MD simulations are in excellent agreement with experiment and reveal the structure to consist of an hexagonal close packed gold lattice with atomic hydrogen disordered in the interstices. The hydrogen is superionic and exhibits high diffusivity through the crystalline gold lattice. Our results present the first solid‐state binary compound of gold and hydrogen.
Article Details
Authors (29)
Mungo Frost
High Energy Density Science Division
Kilian Abraham
Institut für Physik Universität Rostock 18051 Rostock Germany
Alexander F. Goncharov
The Earth and Planets Laboratory, Carnegie Institution for Science 2 , Washington, District of Columbia 20015,
R. Stewart McWilliams
The School of Physics and Astronomy and Centre for Science at Extreme Conditions
Rachel J. Husband
Deutsches Elektronen‐Synchrotron DESY Notkestr. 85 22607 Hamburg Germany
Michal Andrzejewski
Karen Appel
Carsten Baehtz
Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
Armin Bergermann
Institut für Physik Universität Rostock 18051 Rostock Germany
Danielle Brown
Elena Bykova
Institute of Geosciences
Anna Celeste
Department of Earth and Planetary Sciences
Eric Edmund
Earth and Planets Laboratory Carnegie Institution for Science 5241 Broad Branch Rd., NW Washington DC 20015 USA
Nicholas J. Hartley
High Energy Density Sciences Division SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park CA 94025 USA
Konstantin Glazyrin
Heinz Graafsma
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
Nicolas Jaisle
Centre for Science at Extreme Conditions and School of Physics and Astronomy University of Edinburgh King's Buildings Edinburgh EH9 3FD UK
Zuzana Konôpková
European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
Torsten Laurus
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
Yu Lin
Bernhard Massani
University of Edinburgh , , ,
Maximilian Schörner
Institut für Physik Universität Rostock 18051 Rostock Germany
Maximilian Schulze
Bayerisches Geoinstitut Universität Bayreuth 95440 Bayreuth Germany
Cornelius Strohm
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
Minxue Tang
European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
Zena Younes
Centre for Science at Extreme Conditions and School of Physics and Astronomy University of Edinburgh King's Buildings Edinburgh EH9 3FD UK
Gerd Steinle‐Neumann
Bayerisches Geoinstitut Universität Bayreuth 95440 Bayreuth Germany
Ronald Redmer
Institut für Physik Universität Rostock 18051 Rostock Germany
Siegfried H. Glenzer