Nano-ZrO2 as hydrogenation phase in bi-functional catalyst for syngas aromatization

Coordination-Driven Self-Assembly of Schiff-Base-Tagged Ni–ZrO2/N–C Nanocatalysts for Selective Transformation of Renewable Methyl Levulinate

“…The Ni 2p XPS spectrum of Ni in the system exhibits a typical peak of Ni 2p 3/2 at 852.8 eV, indicating the metallic Ni 0 chemical state. , The N 1s XPS spectra of the Ni–ZrO2/N–C nanocatalyst exhibit three distinct peaks, specifically located at 398.5, 400.9, and 402.5 eV. These peaks can be respectively attributed to the presence of pyridinic N, pyrrolic N, and graphitic N. The introduction of N atoms has garnered considerable attention for its capacity to strengthen the interaction between carbon-based materials and metal sites, promote the dispersion of active sites, and inhibit their aggregation. , On the other hand, the electronic state of ZrO 2 in the system was analyzed by XPS, and the peaks observed at 182.4 and 184.8 eV are assigned to Zr 3d 3/2 and Zr 3d 5/2 , respectively . Additionally, the recovered Zr 3d spectrum hardly changed after the catalyst was recycled .…”

Highly Active Cu-CeZrOx/ZSM-5@Si Catalyst for Direct Conversion of Syngas to Aromatics

“…Considering the pretreatment atmosphere of H 2 , weakly bonded oxygen (O wat ) species were generated greatly on the catalyst . Therefore, only O latt and O ads are included in the calculation of the oxygen vacancies (O v ) species concentration, which can be expressed by O ads /(O latt + O ads ) . Therefore, relative ratio of O ads /(O latt + O ads ) should suggest relative concentration of oxygen vacancies in catalyst nanocrystals.…”

“…45 Therefore, only O latt and O ads are included in the calculation of the oxygen vacancies (O v ) species concentration, which can be expressed by O ads /(O latt + O ads ). 46 Therefore, relative ratio of O ads /(O latt + O ads ) should suggest relative concentration of oxygen vacancies in catalyst nanocrystals. From Table S2, we can see that the ratios are approximately 20.5%, 25.4%, 26.0%, and 31.2%, respectively, for the CeZrO x , 1/400Cu-CeZrO x , 1/200Cu-CeZrO x , and 1/100Cu-CeZrO x samples.…”

Preparation of adsorption materials by combustion method: a new approach to the preparation of magnesia doped with trace zirconium

“…[22][23][24][25] Moreover, ZrO 2 was inserted to effectively separate MgO crystals from agglomeration. 16,[26][27][28] Here, the influence of the ZrO 2 content (0-4%) on the structure and CO 2 -adsorption performance of MA was investigated to define the optimal doping amount.…”