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Topics in Catalysis
Erschienen in: Topics in Catalysis 12-14/2017

10.04.2017 | Original Paper

In Situ Regeneration of Au Nanocatalysts by Atmospheric-Pressure Air Plasma: Regeneration Characteristics of Square-Wave Pulsed Plasma

verfasst von: Bin Zhu, Jing-Lin Liu, Xiao-Song Li, Jin-Bao Liu, Xiaobing Zhu, Ai-Min Zhu

Erschienen in: Topics in Catalysis | Ausgabe 12-14/2017

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Abstract

Atmospheric-pressure air plasma, powered by alternating current (AC) sine-wave high voltage, can in-situ regenerate deactivated Au nanocatalysts during CO oxidation, but it needs high-humidity air as the discharge gas. To overcome the limitation on humidity for in-situ regeneration of air plasma, a square-wave pulsed plasma is applied in this work. Differently from the AC plasma, the pulsed plasma exhibits excellent regeneration performance at any humidity. Further, surface carbonate decomposition, nitrogen oxides poisoning species and electric discharge of the pulsed plasma regeneration are investigated. For the pulsed plasma regeneration at any humidity, the evolution of CO2 concentration with the regeneration time almost keeps the same profile, featuring zero-order kinetics for the carbonate decomposition; on the other hand, whether in the gas phase or on the catalyst surface, there are no formation of poisoning nitrogen oxides. The pulsed plasma at any humidity has the powerful ability in carbonate decomposition and simultaneously prevents the formation of poisoning nitrogen oxides, which is ascribed to its highly centralized energy deposition with high instantaneous power and long interval of instantaneous power. For practical application, normal air is also confirmed to be qualified for the pulsed plasma regeneration.
Vorheriger Artikel Enhanced Thermal Stability of Pd/Ce–Sn–O Catalysts for CO Oxidation Prepared by Plasma-Arc Synthesis
Nächster Artikel Cold Plasma for Synthesizing High Performance Bimetallic PdCu catalysts: Effect of Reduction Sequence and Pd/Cu Atomic Ratios

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Metadaten
Titel
In Situ Regeneration of Au Nanocatalysts by Atmospheric-Pressure Air Plasma: Regeneration Characteristics of Square-Wave Pulsed Plasma
verfasst von
Bin Zhu
Jing-Lin Liu
Xiao-Song Li
Jin-Bao Liu
Xiaobing Zhu
Ai-Min Zhu
Publikationsdatum
10.04.2017
Verlag
Springer US
Erschienen in
Topics in Catalysis / Ausgabe 12-14/2017
Print ISSN: 1022-5528
Elektronische ISSN: 1572-9028
DOI
https://doi.org/10.1007/s11244-017-0756-6

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