Constructing Ni-based confinement catalysts with advanced performances toward the CO₂reforming of CH₄: state-of-the-art review and perspectives

Abstract

In recent years, the global greenhouse effect has been received more and more attention due to the increasing emission of the greenhouse gases. The CO2 and CH4 have been widely...

Hollow and mesoporous M@aluminosilicate (M = Rh, Pd and Pt) bifunctional catalytic nanoreactors for the hydrodeoxygenation of lignin-derived phenols

“…With the volume of NaAlO 2 solution from 0.5 to 2.5 mL, the BET surface area of samples gradually decreased, owing to the accumulation of extra Al atoms. 35 To analyze the local environments of Al species, 27 Al nuclear magnetic resonance (NMR) spectroscopy was performed, and the results are shown in Fig. 4.…”

“…The NH 3 temperature-programmed desorption (NH 3 -TPD) analysis was performed using an Auto Chem II 2920 equipment. 27 Al nuclear magnetic resonance (MAS NMR) experiments were conducted using an Agilent 600 M solid-state spectrometer.…”

“…However, these catalysts can suffer from leaching and aggregation of the active metal during the reaction and long-term use, resulting in a significant loss of activity. 11 To enhance the reusability and stability of catalysts, various strategies such as enhancing the interaction between active metals and supports, 24,25 confining the active metals in porous channels, 26,27 and encapsulating the active metals with oxide protective layers have been developed. 28,29 Among these strategies, the encapsulation of nano-sized metal NPs in core-shell structures is considered a potential method because the shells with tunable porous channels can effectively stabilize metal NPs against aggregation and leaching during the reaction.…”

High-throughput screening and literature data-driven machine learning-assisted investigation of multi-component La2O3-based catalysts for the oxidative coupling of methane

“…Actually, combined reports describe that Pd prefers CH 4 combustion, 52 whereas Ni is known for CH 4 reforming and carbon deposition. 53 Indeed, in our earlier classifications, 22,26,48 these two elements were placed in the “worse” element set for OCM. Regarding the interesting feeling for this mismatch, the LCM tentatively suggested 20 types of catalysts including Pd, Ni, and some other elements, which were validated for reactivity, as listed in Table S9 in the ESI †.…”

“…Actually, combined reports describe that Pd prefers CH 4 combustion, 52 whereas Ni is known for CH 4 reforming and carbon deposition. 53 Indeed, in our earlier classifications, 22,26,48 these two elements were placed in the "worse" element set for OCM.…”