Search NASA⌕ Search

DOE OSTI · 1686057

Materials Data on AsRuSe by Materials Project

Abstract

RuAsSe crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ru5+ is bonded to three equivalent As3- and three equivalent Se2- atoms to form distorted RuAs3Se3 octahedra that share corners with eight equivalent RuAs3Se3 octahedra, corners with three equivalent AsRu3Se tetrahedra, corners with three equivalent SeAsRu3 tetrahedra, and edges with two equivalent RuAs3Se3 octahedra. The corner-sharing octahedra tilt angles range from 53–60°. There are one shorter (2.50 Å) and two longer (2.52 Å) Ru–As bond lengths. There are two shorter (2.45 Å) and one longer (2.46 Å) Ru–Se bond lengths. As3- is bonded to three equivalent Ru5+ and one Se2- atom to form distorted AsRu3Se tetrahedra that share corners with three equivalent RuAs3Se3 octahedra, corners with four equivalent AsRu3Se tetrahedra, corners with nine equivalent SeAsRu3 tetrahedra, and an edgeedge with one AsRu3Se tetrahedra. The corner-sharing octahedra tilt angles range from 67–73°. The As–Se bond length is 2.56 Å. Se2- is bonded to three equivalent Ru5+ and one As3- atom to form SeAsRu3 tetrahedra that share corners with three equivalent RuAs3Se3 octahedra, corners with four equivalent SeAsRu3 tetrahedra, corners with nine equivalent AsRu3Se tetrahedra, and an edgeedge with one SeAsRu3 tetrahedra. The corner-sharing octahedra tilt angles range from 75–80°.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-05-09. Materials Data on AsRuSe by Materials Project. https://doi.org/10.17188/1686057

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

Cyclic moisture reactivation of calcium sorbents for long duration thermochemical energy storage

The transition to a flexible and reliable energy infrastructure, using electro-thermal energy generation technologies such as geothermal, concentrated solar power, and nuclear, usually demands simultaneous advancement of thermal energy storage (TES) to support on-demand electricity generation and industrial applications while mitigating the inherent intermittency of renewable energy sources and power outages from direct energy generation. Among TES technologies, thermochemical energy storage (TCES) based on calcium looping emerges as a compelling high-power energy storage candidate due to its high reaction enthalpy, compatibility with elevated operating temperatures, and abundance of low-cost materials. However, the long-term durability of calcium-based sorbents for TCES is hindered by surface sintering and particle aggregation, leading to performance degradation over repeated thermal cycles. This study explores a moisture hydration-based strategy to regenerate a degraded calcium sorbent and mitigate performance degradation for long duration TCES. The addition of moisture transforms calcium oxide into calcium hydroxide and produces intercalation water layers, associated with a regenerated surface area and reduced calcium oxide crystallite size. Both these effects are beneficial in restoring the sorbents' reactivity for carbonization. Additionally, an optimized hydration-assisted reactivation protocol balances the recovered energy storage capacity with heating penalty required for moisture removal from hydrated samples, resulting in an enhanced energy storage capacity up to 176% compared to benchmark sorbents that undergo cycling without reactivation after 60 cycles. In conclusion, these results highlight the potential of hydration-assisted reactivation to enhance the long-term performance of TCES, providing an effective pathway to advancing electro-thermal storage technologies.

36 MATERIALS SCIENCE↗