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Issue 4, 2019
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Strong metal–support interactions of Co-based catalysts facilitated by dopamine for highly efficient ammonia synthesis: in situ XPS and XAFS spectroscopy coupled with TPD studies

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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 by 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 1 MPa is enhanced from 3.81 mmolNH3 gcat−1 h−1 over Co/CeO2 to 19.12 mmolNH3 gcat−1 h−1 over a dopamine-mediated catalyst. The superior catalytic performances of the dopamine-mediated Co/CeO2 catalyst are associated with smaller crystalline size, stronger metal–support interaction and lower N2 activation energy.

Graphical abstract: Strong metal–support interactions of Co-based catalysts facilitated by dopamine for highly efficient ammonia synthesis: in situ XPS and XAFS spectroscopy coupled with TPD studies

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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
Chem. Commun., 2019,55, 474-477

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    Strong metal–support interactions of Co-based catalysts facilitated by dopamine for highly efficient ammonia synthesis: in situ XPS and XAFS spectroscopy coupled with TPD studies

    X. Wang, L. Li, T. Zhang, B. Lin, J. Ni, C. Au and L. Jiang, Chem. Commun., 2019, 55, 474
    DOI: 10.1039/C8CC07130F

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