Search NASA⌕ Search

DOE OSTI · 1741653

Materials Data on ErBPtRh2 by Materials Project

Abstract

ErRh2PtB is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Er is bonded to eight equivalent Rh and four equivalent Pt atoms to form ErPt4Rh8 cuboctahedra that share corners with twelve equivalent ErPt4Rh8 cuboctahedra, faces with six equivalent ErPt4Rh8 cuboctahedra, and faces with eight equivalent BPt2Rh4 octahedra. All Er–Rh bond lengths are 2.98 Å. All Er–Pt bond lengths are 2.99 Å. Rh is bonded to four equivalent Er and two equivalent B atoms to form distorted RhEr4B2 octahedra that share corners with eight equivalent PtEr4B2 octahedra, corners with fourteen equivalent RhEr4B2 octahedra, edges with four equivalent RhEr4B2 octahedra, faces with four equivalent RhEr4B2 octahedra, and faces with four equivalent PtEr4B2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. Both Rh–B bond lengths are 2.12 Å. Pt is bonded to four equivalent Er and two equivalent B atoms to form distorted PtEr4B2 octahedra that share corners with six equivalent PtEr4B2 octahedra, corners with sixteen equivalent RhEr4B2 octahedra, edges with four equivalent PtEr4B2 octahedra, and faces with eight equivalent RhEr4B2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. Both Pt–B bond lengths are 2.10 Å. B is bonded to four equivalent Rh and two equivalent Pt atoms to form BPt2Rh4 octahedra that share corners with six equivalent BPt2Rh4 octahedra and faces with eight equivalent ErPt4Rh8 cuboctahedra. The corner-sharing octahedral tilt angles are 0°.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

2020-05-03. Materials Data on ErBPtRh2 by Materials Project. https://doi.org/10.17188/1741653

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↗