Journal Article

PUBDB-2022-03841

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png CO$_2$ Activation over Nanoshaped CeO$_2$ Decorated with Nickel for Low-Temperature Methane Dry Reforming

Lorber, K. (Corresponding author)Extern* ; Zavašnik, J. ; Arčon, I.Extern* ; Huš, M. ; Teržan, J. ; Likozar, B. ; Djinovic, P.Extern*

2022
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsami.2c05221  doi:10.3204/PUBDB-2022-03841

Abstract: Dry reforming of methane (DRM) is a promising way to convert methane and carbon dioxide into H$_2$ and CO (syngas). CeO$_2$ nanorods, nanocubes, and nanospheres were decorated with 1–4 wt % Ni. The materials were structurally characterized using TEM and in situ XANES/EXAFS. The CO$_2$ activation was analyzed by DFT and temperature-programmed techniques combined with MS-DRIFTS. Synthesized CeO$_2$ morphologies expose {111} and {100} terminating facets, varying the strength of the CO$_2$ interaction and redox properties, which influence the CO$_2$ activation. Temperature-programmed CO$_2$ DRIFTS analysis revealed that under hydrogen-lean conditions mono- and bidentate carbonates are hydrogenated to formate intermediates, which decompose to H$_2$O and CO. In excess hydrogen, methane is the preferred reaction product. The CeO$_2$ cubes favor the formation of a polydentate carbonate species, which is an inert spectator during DRM at 500 °C. Polydentate covers a considerable fraction of ceria’s surface, resulting in less-abundant surface sites for CO$_2$ dissociation.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20180898 EC (I-20180898-EC) (I-20180898-EC)
3. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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