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dc.contributor.authorNiu, Juntian
dc.contributor.authorWang, Yalan
dc.contributor.authorQi, Yanying
dc.contributor.authorDam, Anh Hoang
dc.contributor.authorWang, Hongmin
dc.contributor.authorZhu, Yi-An
dc.contributor.authorHolmen, Anders
dc.contributor.authorRan, Jingyu
dc.contributor.authorChen, De
dc.identifier.citationFuel. 2020, 266 1-12.en_US
dc.description.abstractIn this contribution, we combine density functional theory (DFT) calculations, experimental kinetic study and DFT-assisted analysis to elucidate the impact of the interface of monolayer Pt on the Ni surface on catalytic performance of steam methane reforming including carbon formation on core-shell (Ni@Pt) catalysts and compare it with Ni and Pt catalysts. We demonstrate that core-shell structured Ni@Pt significantly lowers the carbon formation without sacrificing much the activity. The DFT results demonstrate that the metal identity, core shell structure and support have significant impacts on the reaction mechanisms. The direct methane activation is energetically favorable reaction pathway on Ni, while the OH* assisted methane activation is the favorable pathway on Pt and Ni@Pt catalysts, where methane activation is the rate-determining step on all catalysts. We unambiguously reveal that the core-shell Ni@Pt catalyst modified the surface Pt electron density and shifted d-band center away from Fermi level compared to Ni(1 1 1) and Pt(1 1 1). It results in a strong basic surface OH* which actively reacts with CHx and thus enhances carbon formation resistance. Above all, Ni-core/Pt-shell particle could decouple the activity and carbon resistance to keep the activity and reduce carbon formation simultaneously in methane steam reforming. In addition, by taking into account the activation of steam on the support, the effective activation energy estimated from DFT-assisted analysis is well consistent with the experimental value on the both Ni and Ni@Pt catalysts, which could shed some light on building a bridge between experimental work and DFT-assisted kinetic study.en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titleNew mechanism insights into methane steam reforming on Pt/Ni from DFT and experimental kinetic studyen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.localcode"© 2020. This is the authors’ accepted and refereed manuscript to the article. Locked until 25.1.2022 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license "en_US

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal