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High-throughput oxygen chemical potential engineering of perovskite oxides for chemical looping applications

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/d1ee02889h· OSTI ID:1978785
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [2];  [4];  [2]
  1. North Carolina State University, Raleigh, NC (United States); OSTI
  2. North Carolina State University, Raleigh, NC (United States)
  3. North Carolina State University, Raleigh, NC (United States); Northeast Petroleum University (China)
  4. Univ. of Science and Technology of China, Hefei (China)
Chemical looping (CL) represents a versatile, emerging strategy for sustainable chemical and energy conversion. Designing metal oxide oxygen carriers with suitable redox properties remains one of the most critical challenges to CL due to the considerably different thermodynamic property requirements for different applications. Here, taking SrFeO3–δ as a base-structure, this study seeks to rationally substitute its A- and/or B-site cations to tailor the equilibrium oxygen partial pressure over 20 orders of magnitude. 2401 SrxA1–xFeyB1–yO3–δ perovskite-phase structures were investigated using high-throughput density functional theory (DFT) and 227, 273 high-entropy perovskites were screened via machine learning (ML). This significantly expands the materials design space. While most of the compositions predicted are new and nonobvious, 19 previously reported oxygen carriers, with excellent redox properties, were correctly identified by the algorithm. Moreover, we experimentally demonstrated 15 new oxygen carriers with superior redox performance. These results support the effectiveness of the high-throughput approaches for accelerated materials discovery.
Research Organization:
North Carolina State University, Raleigh, NC (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0031521
OSTI ID:
1978785
Alternate ID(s):
OSTI ID: 1846340
Journal Information:
Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 4 Vol. 15; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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