Search NASA⌕ Search

DOE OSTI · 1268907

Materials Data on Sb4IrC5ClO5F22 by Materials Project

Abstract

IrCl(CO)5(Sb2F11)2 crystallizes in the monoclinic P2_1 space group. The structure is zero-dimensional and consists of ten formaldehyde molecules, two IrCl clusters, and four Sb2F11 clusters. In each IrCl cluster, Ir5+ is bonded in a single-bond geometry to one Cl1- atom. The Ir–Cl bond length is 2.37 Å. Cl1- is bonded in a distorted single-bond geometry to one Ir5+ atom. In each Sb2F11 cluster, there are two inequivalent Sb2+ sites. In the first Sb2+ site, Sb2+ is bonded to six F1- atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of Sb–F bond distances ranging from 1.89–2.06 Å. In the second Sb2+ site, Sb2+ is bonded to six F1- atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of Sb–F bond distances ranging from 1.89–2.09 Å. There are eleven inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the seventh F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the eighth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the ninth F1- site, F1- is bonded in a bent 150 degrees geometry to two Sb2+ atoms. In the tenth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the eleventh F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-29. Materials Data on Sb4IrC5ClO5F22 by Materials Project. https://doi.org/10.17188/1268907

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↗