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Strong Metal−Support Interactions of Co-based Catalysts Facilitated by Dopamine for High Efficient Ammonia Synthesis: In Situ XPS and XAFS Spectroscopy Coupled with TPD Study

Abstract

We report a new strategy for strengthening metal-support interaction and stabilizing Co nanoparticles at high temperature. Through the use of dopamine and removal of carbon layers in thermal N2 treatment, ceria-based Co catalysts that are efficient and highly stable for ammonia synthesis can be obtained. The ammonia synthesis rate at 425 °C and 1MPa is enhanced from 3.81 mmolNH3/gcat.h over Co/CeO2 to 19.12 mmolNH3/gcat.h over dopamine-mediated one. The superior catalytic performances in dopamine-mediated Co/CeO2 catalyst are associated with smaller crystalline size, stronger SMSI and lower N2 activation energy.

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Publication details

The article was received on 03 Sep 2018, accepted on 06 Dec 2018 and first published on 06 Dec 2018


Article type: Communication
DOI: 10.1039/C8CC07130F
Citation: Chem. Commun., 2018, Accepted Manuscript
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    Strong Metal−Support Interactions of Co-based Catalysts Facilitated by Dopamine for High Efficient Ammonia Synthesis: In Situ XPS and XAFS Spectroscopy Coupled with TPD Study

    X. Wang, L. Li, T. Zhang, B. Lin, J. Ni, C. Au and L. Jiang, Chem. Commun., 2018, Accepted Manuscript , DOI: 10.1039/C8CC07130F

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