Search NASA⌕ Search

DOE OSTI · 1288146

Materials Data on Mo2H3(CO2)4 by Materials Project

Abstract

Mo2H3(CO2)4 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is one-dimensional and consists of four Mo2H3(CO2)4 ribbons oriented in the (1, 0, 0) direction. there are two inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to five O2- atoms to form distorted edge-sharing MoO5 trigonal bipyramids. There are a spread of Mo–O bond distances ranging from 2.19–2.50 Å. In the second Mo6+ site, Mo6+ is bonded to five O2- atoms to form distorted edge-sharing MoO5 trigonal bipyramids. There are a spread of Mo–O bond distances ranging from 2.19–2.52 Å. There are four inequivalent C+0.25+ sites. In the first C+0.25+ site, C+0.25+ is bonded in a trigonal planar geometry to one H1+ and two O2- atoms. The C–H bond length is 1.11 Å. There is one shorter (1.27 Å) and one longer (1.28 Å) C–O bond length. In the second C+0.25+ site, C+0.25+ is bonded in a trigonal planar geometry to one H1+ and two O2- atoms. The C–H bond length is 1.10 Å. Both C–O bond lengths are 1.28 Å. In the third C+0.25+ site, C+0.25+ is bonded in a distorted bent 150 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.25 Å. In the fourth C+0.25+ site, C+0.25+ is bonded in a trigonal planar geometry to one H1+ and two O2- atoms. The C–H bond length is 1.11 Å. There is one shorter (1.27 Å) and one longer (1.28 Å) C–O bond length. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C+0.25+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C+0.25+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C+0.25+ atom. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two Mo6+ and one C+0.25+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Mo6+ and one C+0.25+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mo6+ and one C+0.25+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-07-15. Materials Data on Mo2H3(CO2)4 by Materials Project. https://doi.org/10.17188/1288146

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↗