Strong metal–support interactions on gold nanoparticle catalysts achieved through Le Chatelier’s principle

Wang, Hai; Wang, Liang; Dong, Lin; Feng, Xiang; Niu, Yiming; Zhang, Bingsen; Xiao, Feng‐Shou

doi:10.1038/s41929-021-00611-3

Cited by 228 publications

(159 citation statements)

References 60 publications

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“…For the foreseeable future, carbon-based fuels, such as natural gas, petroleum, and biomass, will continue to be a significant part of our energy infrastructure, and interfacially engineered heterogeneous catalytic materials relying on transition metal (TM) species will continue to play a critical role in meeting our daily energy needs. [1][2][3][4] It has been demonstrated that once supported or confined, TMs, their oxide, carbide and nitrides particles exhibit promising performance with high activity and selectivity in selective conversion of methane, [5][6][7][8] low-temperature CO conversion, 9,10 selective hydrogenation/dehydrogenation, [11][12][13][14] bio-oil conversion and upgrading, [15][16][17][18] and water-gas shift reaction 19,20 . Existing literature on heterogeneous catalytic materials primarily emphasize their outstanding performance and complexity in kinetics and reaction mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of Molybdenum Trioxide (MoO3) Encapsulated in Zeolite Y

Zhang

Goncharov

et al. 2021

Preprint

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Zeolites with encapsulated transition metal species are extensively applied in the chemical industry as heterogenous catalysts for favorable kinetic pathways. To elucidate the energetic insights into formation of subnano-sized molybdenum trioxide (MoO3) encapsulated/confined in zeolite Y (FAU) from constituent oxides, we performed a systematic experimental thermodynamic study using high temperature oxide melt solution calorimetry as the major tool. Specifically, the formation enthalpy of each MoO3/FAU is less endothermic than corresponding zeolite Y, suggesting enhanced thermodynamic stability. As Si/Al ratio increases, the enthalpies of formation of MoO3/FAU with identical MoO3 loading tends to be less endothermic, ranging from 61.1 ± 1.8 (Si/Al = 2.9) to 32.8 ± 1.4 kJ/mol TO2 (Si/Al = 45.6). Coupled with spectroscopic, structural and morphological characterizations, and catalytic performance tests, we revealed intricate energetics of MoO3 – zeolite Y guest – host interactions and catalytic performance governed by the phase evolutions of encapsulated MoO3.

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Section: Introductionmentioning

confidence: 99%

Thermodynamics of Molybdenum Trioxide (MoO3) Encapsulated in Zeolite Y

Zhang

Goncharov

et al. 2021

Preprint

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“…Perhaps, their bulk forms are presented with these limitations. Furthermore, other factors, such as the strong metal-support interactions (SMSI) for supported metal catalysts on the reducible oxide supports, should be considered, as the reduced support oxide can migrate and cover the active metal particles, significantly impacting the electronic and interface structure of the catalysts [195,196].…”

Section: Discussionmentioning

confidence: 99%

Impacts of the Catalyst Structures on CO2 Activation on Catalyst Surfaces

2021

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Utilizing CO2 as a sustainable carbon source to form valuable products requires activating it by active sites on catalyst surfaces. These active sites are usually in or below the nanometer scale. Some metals and metal oxides can catalyze the CO2 transformation reactions. On metal oxide-based catalysts, CO2 transformations are promoted significantly in the presence of surface oxygen vacancies or surface defect sites. Electrons transferable to the neutral CO2 molecule can be enriched on oxygen vacancies, which can also act as CO2 adsorption sites. CO2 activation is also possible without necessarily transferring electrons by tailoring catalytic sites that promote interactions at an appropriate energy level alignment of the catalyst and CO2 molecule. This review discusses CO2 activation on various catalysts, particularly the impacts of various structural factors, such as oxygen vacancies, on CO2 activation.

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“…It is generally accepted that encapsulation of metal nanoparticles hardly occurs on hard-to-reduce oxide-supports such as SiO 2 , 10 MgO, 42 and ZnO. 23,43,44 Nonetheless, building an appropriate oxide–metal interface has always attracted great attention in industrial processes, in which SiO 2 is of greater interest.…”

Section: Introductionmentioning

confidence: 99%