Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 29, Pages 15912-15919Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202101335
Keywords
alloy nanoparticles; dry reforming of methane; exsolution; perovskites; topotactic exsolution
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Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20173020032120]
- National Research Foundation Korea - Ministry of Science, ICT, and Future Planning [NRF-2018R1A2A1A05077532]
- Chinese Academy of Sciences President's International Fellowship Initiative [2021VCA0013]
- Instrument and Equipment Development Program, Chinese Academy of Sciences [YJKYYQ20180066]
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The newly developed DRM catalyst, using topotactic exsolution to produce Co-Ni-Fe ternary alloy nanoparticles on a specific substrate, shows high catalytic activity and stability, enabling continuous DRM operation for about 350 hours.
Dry reforming of methane (DRM) is a feasible solution to address the reduction of greenhouse gases stipulated by the Paris Climate Agreement, given that it adds value by converting trivial gases, CO2 and CH4, simultaneously into useful syngas. However, the conventional Ni catalyst undergoes deactivation due to carbon coking and particle agglomeration. Here we demonstrate a highly efficient and durable DRM catalyst: exsolved Co-Ni-Fe ternary alloy nanoparticles on the layered perovskite PrBaMn1.7Co0.1Ni0.2O5+delta produced by topotactic exsolution. This method readily allows the generation of a larger number of exsolved nanoparticles with enhanced catalytic activity above that of Ni monometallic and Co-Ni bimetallic particles. The enhancement is achieved by the upshift of the d-band center of Co-Ni-Fe relative to those of Co-Ni and Ni, meaning easier charge donation to the adsorbate. Furthermore, the exsolved catalyst shows exceptional stability, with continuous DRM operation for about 350 hours.
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