Search NASA⌕ Search

DOE OSTI · 1714081

Materials Data on SmP2H16C6NO13 by Materials Project

Abstract

SmC6P2NH14O12H2O crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four water molecules and one SmC6P2NH14O12 sheet oriented in the (1, 0, 0) direction. In the SmC6P2NH14O12 sheet, Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.33–2.51 Å. There are six inequivalent C sites. In the first C site, C is bonded to one P5+, one N3-, and two H1+ atoms to form distorted corner-sharing CPH2N tetrahedra. The C–P bond length is 1.83 Å. The C–N bond length is 1.51 Å. Both C–H bond lengths are 1.10 Å. In the second C site, C is bonded to one P5+, one N3-, and two H1+ atoms to form distorted corner-sharing CPH2N tetrahedra. The C–P bond length is 1.84 Å. The C–N bond length is 1.51 Å. Both C–H bond lengths are 1.10 Å. In the third C site, C is bonded in a 3-coordinate geometry to one N3- and two H1+ atoms. The C–N bond length is 1.51 Å. Both C–H bond lengths are 1.10 Å. In the fourth C site, C is bonded in a distorted trigonal non-coplanar geometry to two H1+ and one O2- atom. There is one shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. The C–O bond length is 1.46 Å. In the fifth C site, C is bonded in a distorted bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.27 Å) C–O bond length. In the sixth C site, C is bonded in a distorted bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.27 Å) C–O bond length. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to one C and three O2- atoms to form distorted PCO3 tetrahedra that share a cornercorner with one NHC3 tetrahedra. There is two shorter (1.51 Å) and one longer (1.62 Å) P–O bond length. In the second P5+ site, P5+ is bonded to one C and three O2- atoms to form distorted PCO3 tetrahedra that share a cornercorner with one NHC3 tetrahedra. There is two shorter (1.52 Å) and one longer (1.59 Å) P–O bond length. N3- is bonded to three C and one H1+ atom to form distorted NHC3 tetrahedra that share corners with two PCO3 tetrahedra. The N–H bond length is 1.05 Å. There are fourteen inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.53 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the thirteenth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the fourteenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Sm3+ and one C atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Sm3+ and one C atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sm3+ and one C atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sm3+ and one C atom. In the fifth O2- site, O2- is bonded in a water-like geometry to one Sm3+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three H1+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sm3+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sm3+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to one C and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sm3+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a bent 120 degrees geometry to one P5+ and one H1+ atom. In the twelfth O2- site, O2- is bonded in a distorted single-bond geometry to one P5+ atom.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-05-02. Materials Data on SmP2H16C6NO13 by Materials Project. https://doi.org/10.17188/1714081

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↗