Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/138166
Title: DIRECTLY OBSERVING CATALYTIC INTERMEDIATES OF METHANE DRY REFORMING (MDR) ON MODEL NI(111) CATALYST VIA IN OPERANDO SURFACE TECHNIQUES
Authors: YUAN KAIDI
Keywords: NAP-XPS, CH4, CO2, Methane dry reforming, Ni(111), Model catalyst
Issue Date: 24-Aug-2017
Source: YUAN KAIDI (2017-08-24). DIRECTLY OBSERVING CATALYTIC INTERMEDIATES OF METHANE DRY REFORMING (MDR) ON MODEL NI(111) CATALYST VIA IN OPERANDO SURFACE TECHNIQUES. ScholarBank@NUS Repository.
Abstract: In this work, near ambient pressure x-ray photoelectron spectroscopy was used to trace the in operando catalytic intermediates of methane dry reforming on model Ni(111) catalyst. The following reactive carbon intermediates have been characterized from dissociation of CH4: *CH, *C1 (Ni3C), *Cn (n≥2) and clock-reconstructed Ni2C. They can develop into inert graphene, and the conditions for this transition have been explored. One the other hand, the oxygen intermediates from CO2 dissociation were also studied, which play an important role on restraining graphene growth. Their dynamic coverage decreases with increasing temperature, which is suggested the fundamental mechanism of regional carbon overspill and causes irreversible graphene formation. Therefore, solutions based on Ni–O stabilization were proposed in developing coking resisting catalysts.
URI: http://scholarbank.nus.edu.sg/handle/10635/138166
Appears in Collections:Ph.D Theses (Open)

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