DataVXAdvanced Energy MaterialsPaper
journal article·2024-06

Raisins in a Hydrogen Pie: Ultrastable Cesium and Rubidium Polyhydrides

Di Zhou, Dmitrii Semenok, Michele Galasso, Frederico Gil Alabarse, Denis Sannikov, Ivan A. Troyan, Yuki Nakamoto, Katsuya Shimizu, Artem R. Oganov

Advanced Energy Materials· Volume 14· Issue 23
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Source abstract

Abstract

Abstract A new method for synthesis of metal polyhydrides via high‐pressure thermal decomposition of corresponding amidoboranes in diamond anvil cells is proposed. Within this approach, molecular semiconducting cesium (P4/nmm‐CsH7, P1‐CsH15+x) and rubidium (RbH9‐x) polyhydrides with a very high hydrogen content reaching 93 at.% are synthesized. Preservation of CsH7 at near ambient conditions, confirmed both experimentally and theoretically, represents a significant advance in the stabilization of hydrogen‐rich compounds. In addition, two crystalline modifications of RbH9‐x with pseudohexagonal and pseudotetragonal structures identified by synchrotron X‐ray diffraction, and Raman measurements are synthesized. Both phases are stable at 8–10 GPa. This is an unprecedentedly low stabilization pressure for polyhydrides. These discoveries open up possibilities for modifying existing hydrogen storage materials to increase their efficiency.
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Research context

OpenAlex topics: Hydrogen Storage and Materials · Nuclear Materials and Properties · Boron and Carbon Nanomaterials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for High Pressure Science & Technology Advanced Research Bldg. #8E, ZPark, 10 Xibeiwang East Rd, Haidian District Beijing 100193 China

Institute of Solid‐State Physics University of Latvia 8 Kengaraga str. Riga LV‐1063 Latvia

Elettra Sincrotrone Trieste Strada Statale 14 – km 163,5 in AREA Science Park, Basovizza Trieste 34149 Italy

Skolkovo Institute of Science and Technology Bolshoy Boulevard 30, bld. 1 Moscow 121205 Russia

Shubnikov Institute of Crystallography Kurchatov Complex of Crystallography and Photonics NRC“Kurchatov Institute” 59 Leninsky Prospekt Moscow 119333 Russia

KYOKUGEN Graduate School of Engineering Science Osaka University Machikaneyamacho 1–3 Toyonaka Osaka 560–8531 Japan

Funding

National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality · China Postdoctoral Science Foundation · Russian Science Foundation

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