Search NASA⌕ Search

DOE OSTI · 1695324

Materials Data on YbPr3Co34 by Materials Project

Abstract

YbPr3Co34 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. Yb is bonded in a 10-coordinate geometry to nineteen Co atoms. There are a spread of Yb–Co bond distances ranging from 2.99–3.22 Å. There are three inequivalent Pr sites. In the first Pr site, Pr is bonded in a 10-coordinate geometry to nineteen Co atoms. There are a spread of Pr–Co bond distances ranging from 3.01–3.26 Å. In the second Pr site, Pr is bonded in a 10-coordinate geometry to nineteen Co atoms. There are a spread of Pr–Co bond distances ranging from 2.99–3.30 Å. In the third Pr site, Pr is bonded in a 10-coordinate geometry to nineteen Co atoms. There are a spread of Pr–Co bond distances ranging from 3.01–3.28 Å. There are twenty-two inequivalent Co sites. In the first Co site, Co is bonded to one Yb, one Pr, and ten Co atoms to form a mixture of distorted face, edge, and corner-sharing CoYbPrCo10 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.37–2.69 Å. In the second Co site, Co is bonded in a 12-coordinate geometry to two Pr and ten Co atoms. There are a spread of Co–Co bond distances ranging from 2.38–2.64 Å. In the third Co site, Co is bonded to one Yb, one Pr, and ten Co atoms to form distorted CoYbPrCo10 cuboctahedra that share corners with twenty-one CoPr2Co10 cuboctahedra, edges with four CoYbPrCo10 cuboctahedra, and faces with seventeen CoYbPrCo10 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.37–2.68 Å. In the fourth Co site, Co is bonded in a 12-coordinate geometry to two Pr and ten Co atoms. There are a spread of Co–Co bond distances ranging from 2.38–2.65 Å. In the fifth Co site, Co is bonded to one Yb, one Pr, and ten Co atoms to form distorted CoYbPrCo10 cuboctahedra that share corners with twenty CoPr2Co10 cuboctahedra, edges with four CoYbPrCo10 cuboctahedra, and faces with twenty CoYbPrCo10 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.37–2.68 Å. In the sixth Co site, Co is bonded in a 12-coordinate geometry to two Pr and ten Co atoms. There are a spread of Co–Co bond distances ranging from 2.38–2.66 Å. In the seventh Co site, Co is bonded to one Yb, two Pr, and nine Co atoms to form CoYbPr2Co9 cuboctahedra that share corners with seventeen CoYbPrCo10 cuboctahedra, edges with ten CoPr2Co10 cuboctahedra, and faces with eighteen CoYbPrCo10 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.42–2.60 Å. In the eighth Co site, Co is bonded to three Pr and nine Co atoms to form CoPr3Co9 cuboctahedra that share corners with twenty-one CoPr2Co10 cuboctahedra, edges with eight CoYbPrCo10 cuboctahedra, and faces with twelve CoPr2Co10 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.40–2.58 Å. In the ninth Co site, Co is bonded to one Yb, two equivalent Pr, and nine Co atoms to form a mixture of face, edge, and corner-sharing CoYbPr2Co9 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.41–2.60 Å. In the tenth Co site, Co is bonded to three Pr and nine Co atoms to form a mixture of face, edge, and corner-sharing CoPr3Co9 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.40–2.59 Å. In the eleventh Co site, Co is bonded to one Yb, two Pr, and nine Co atoms to form CoYbPr2Co9 cuboctahedra that share corners with nineteen CoYbPrCo10 cuboctahedra, edges with ten CoPr2Co10 cuboctahedra, and faces with fourteen CoYbPrCo10 cuboctahedra. There are two shorter (2.41 Å) and one longer (2.58 Å) Co–Co bond lengths. In the twelfth Co site, Co is bonded to one Yb, two Pr, and nine Co atoms to form CoYbPr2Co9 cuboctahedra that share corners with nineteen CoPr2Co10 cuboctahedra, edges with eight CoYbPrCo10 cuboctahedra, and faces with sixteen CoPr2Co10 cuboctahedra. There are two shorter (2.39 Å) and one longer (2.56 Å) Co–Co bond lengths. In the thirteenth Co site, Co is bonded to two equivalent Yb, one Pr, and nine Co atoms to form a mixture of face, edge, and corner-sharing CoYb2PrCo9 cuboctahedra. There are two shorter (2.39 Å) and one longer (2.57 Å) Co–Co bond lengths. In the fourteenth Co site, Co is bonded to three Pr and nine Co atoms to form a mixture of face, edge, and corner-sharing CoPr3Co9 cuboctahedra. There are two shorter (2.40 Å) and one longer (2.58 Å) Co–Co bond lengths. In the fifteenth Co site, Co is bonded to one Yb, one Pr, and ten Co atoms to form a mixture of distorted face, edge, and corner-sharing CoYbPrCo10 cuboctahedra. There are one shorter (2.55 Å) and one longer (2.57 Å) Co–Co bond lengths. In the sixteenth Co site, Co is bonded to two Pr and ten Co atoms to form CoPr2Co10 cuboctahedra that share corners with twenty CoYbPrCo10 cuboctahedra, edges with six CoYbPr2Co9 cuboctahedra, and faces with twelve CoYbPrCo10 cuboctahedra. Both Co–Co bond lengths are 2.58 Å. In the seventeenth Co site, Co is bonded to one Yb, one Pr, and ten Co atoms to form a mixture of distorted face, edge, and corner-sharing CoYbPrCo10 cuboctahedra. There are one shorter (2.55 Å) and one longer (2.57 Å) Co–Co bond lengths. In the eighteenth Co site, Co is bonded to two Pr and ten Co atoms to form distorted CoPr2Co10 cuboctahedra that share corners with seventeen CoYbPrCo10 cuboctahedra, edges with seven CoYbPrCo10 cuboctahedra, and faces with thirteen CoPr2Co10 cuboctahedra. Both Co–Co bond lengths are 2.57 Å. In the nineteenth Co site, Co is bonded in a 2-coordinate geometry to one Yb and thirteen Co atoms. The Co–Co bond length is 2.34 Å. In the twentieth Co site, Co is bonded in a 2-coordinate geometry to one Pr and thirteen Co atoms. The Co–Co bond length is 2.34 Å. In the twenty-first Co site, Co is bonded in a 2-coordinate geometry to one Pr and thirteen Co atoms. In the twenty-second Co site, Co is bonded in a 2-coordinate geometry to one Pr and thirteen Co atoms.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-06-05. Materials Data on YbPr3Co34 by Materials Project. https://doi.org/10.17188/1695324

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↗