High-entropy Fluorite Oxides Supported Pt Catalysts for Catalytic Ammonia Combustion at 1200 °C

Abstract

High-temperature catalytic ammonia combustion (HT-CAC) is a promising strategy for the clean and efficient utilization of energy carried by green NH3 fuels. A key challenge lies in developing catalysts that offer high ammonia oxidation activity, excellent thermal stability, and high N2 selectivity. In this study, we synthesized a high-entropy fluorite oxide aerogel (HEFOA) via supercritical drying. The enhanced chemical disorder results in a higher specific surface area and improved thermal resistance compared to its low-entropy counterpart (LEFOA). Incorporating Pt through a one-pot method yielded Pt@HEFOA, which demonstrated outstanding catalytic activity and long-term stability during a 50-hour HT-CAC test at 1200 °C. This work opens new avenues for designing robust ammonia combustion catalysts that remain effective under extreme temperatures, which can contribute to the development of a sustainable NH₃-based hydrogen energy cycle.

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Article information

Article type
Communication
Submitted
12 Jun 2025
Accepted
05 Aug 2025
First published
06 Aug 2025

Nanoscale Horiz., 2025, Accepted Manuscript

High-entropy Fluorite Oxides Supported Pt Catalysts for Catalytic Ammonia Combustion at 1200 °C

L. Xu, X. He, C. Xu, Z. Dai, H. Wang, N. Yan, Q. He, B. Yao and Y. Du, Nanoscale Horiz., 2025, Accepted Manuscript , DOI: 10.1039/D5NH00411J

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