Dry Reforming of Methane on Single-Site Ni/MgO Catalysts: Importance of Site Confinement
By Z. Zuo, Shizhong Liu, Zichun Wang, Cheng-hai Liu, Wei Huang, Jun Huang, Ping Liu. ACS Catalysis, 2018
182 citations recorded by the source corpus.
Single-site catalysts (SSCs) have drawn considerable attention, because of their superior behaviors in catalysis. However, the origin of promoting the effect of a single site is not well understood. Here, we take the single-atom Ni1/Mg(100) and single-site Ni4/Mg(100) catalysts as a case study to elucidate their behaviors under the complex dry reforming of methane (DRM, CO2 + CH4→ 2CO + 2H2) reaction by combining theoretical modeling (density functional theory and kinetic Monte Carlo simulation) and experimental studies. The synergy between single Ni atom and MgO is found to improve the binding property of MgO; yet, it is not enough to dissociate CO2 and CH4. It can be achieved by the single-site Ni4/MgO(100) catalyst, enabling the formations of CO, H2, and H2O under the DRM conditions. During this process, coking, as observed for bulklike Ni particles, is eliminated. By confining the reaction to occur at the isolated Ni sites in the SSC, the Ni4/MgO(100) catalyst is able to balance the CO2 and CH4 activa...
Subfields: Catalysis, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/99b9b19e8bf8f0cc38066f3b0f08ab31ee2de3f4
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Citations in the corpus
- Catalytic Hydrogen Production from Methane: A Review on Recent Progress and Prospect (2020, background): “The experimental observation on a 5% Ni/MgO catalyst including a Ni cluster of 3–4 Ni atoms agrees well with the calculation predictions (Figure 2) [27].”