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Enhancing Thermocatalytic Activities by Upshifting the d‐Band Center of Exsolved Co‐Ni‐Fe Ternary Alloy Nanoparticles for the Dry Reforming of Methane
Author(s) -
Joo Sangwook,
Kim Kyeounghak,
Kwon Ohhun,
Oh Jinkyung,
Kim Hyung Jun,
Zhang Linjuan,
Zhou Jing,
Wang JianQiang,
Jeong Hu Young,
Han Jeong Woo,
Kim Guntae
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202101335
Subject(s) - carbon dioxide reforming , syngas , ternary operation , methane , materials science , bimetallic strip , nanoparticle , catalysis , chemical engineering , alloy , nanotechnology , metallurgy , chemistry , metal , biochemistry , organic chemistry , engineering , computer science , programming language
Abstract 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, CO 2 and CH 4 , 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 PrBaMn 1.7 Co 0.1 Ni 0.2 O 5+ δ 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.