Search NASA⌕ Search

DOE OSTI · 1287245

Materials Data on Na2H6PtC4N4O3 by Materials Project

Abstract

Na2PtC4N4H6O3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are five inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to four N3- and two O2- atoms to form edge-sharing NaN4O2 octahedra. There are a spread of Na–N bond distances ranging from 2.50–2.61 Å. There are one shorter (2.40 Å) and one longer (2.42 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded to two N3- and four O2- atoms to form edge-sharing NaN2O4 octahedra. There are one shorter (2.47 Å) and one longer (2.50 Å) Na–N bond lengths. There are a spread of Na–O bond distances ranging from 2.42–2.55 Å. In the third Na1+ site, Na1+ is bonded to two N3- and four O2- atoms to form edge-sharing NaN2O4 octahedra. There are one shorter (2.46 Å) and one longer (2.50 Å) Na–N bond lengths. There are a spread of Na–O bond distances ranging from 2.44–2.56 Å. In the fourth Na1+ site, Na1+ is bonded to four N3- and two equivalent O2- atoms to form edge-sharing NaN4O2 octahedra. There are two shorter (2.49 Å) and two longer (2.63 Å) Na–N bond lengths. Both Na–O bond lengths are 2.40 Å. In the fifth Na1+ site, Na1+ is bonded to four N3- and two equivalent O2- atoms to form edge-sharing NaN4O2 octahedra. There are two shorter (2.52 Å) and two longer (2.54 Å) Na–N bond lengths. Both Na–O bond lengths are 2.43 Å. There are two inequivalent Pt2+ sites. In the first Pt2+ site, Pt2+ is bonded in a distorted rectangular see-saw-like geometry to four C2+ atoms. All Pt–C bond lengths are 1.99 Å. In the second Pt2+ site, Pt2+ is bonded in a rectangular see-saw-like geometry to four C2+ atoms. There is two shorter (1.98 Å) and two longer (1.99 Å) Pt–C bond length. There are eight inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.18 Å. In the second C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.17 Å. In the third C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.18 Å. In the fourth C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.17 Å. In the fifth C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.18 Å. In the sixth C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.17 Å. In the seventh C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.18 Å. In the eighth C2+ site, C2+ is bonded in a single-bond geometry to one Pt2+ and one N3- atom. The C–N bond length is 1.17 Å. There are eight inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted water-like geometry to one Na1+ and one C2+ atom. In the second N3- site, N3- is bonded in a 3-coordinate geometry to two Na1+ and one C2+ atom. In the third N3- site, N3- is bonded in a distorted water-like geometry to one Na1+ and one C2+ atom. In the fourth N3- site, N3- is bonded in a 1-coordinate geometry to two Na1+ and one C2+ atom. In the fifth N3- site, N3- is bonded in a distorted bent 120 degrees geometry to one Na1+ and one C2+ atom. In the sixth N3- site, N3- is bonded in a 3-coordinate geometry to two Na1+ and one C2+ atom. In the seventh N3- site, N3- is bonded in a bent 120 degrees geometry to one Na1+ and one C2+ atom. In the eighth N3- site, N3- is bonded in a 3-coordinate geometry to two Na1+ and one C2+ atom. There are twelve inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-04-29. Materials Data on Na2H6PtC4N4O3 by Materials Project. https://doi.org/10.17188/1287245

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↗