Novel Catalytic Systems for Hydrogen Production via the Water-Gas Shift Reaction

Abstract

The present work reports on the development of new catalysts for the production of hydrogen via the water-gas shift (WGS) reaction. In particular, the effect of Ce/La atom ratio on the catalytic performance of 0.5 wt% Pt supported on Ce 1− La O 2− ( = 0.0, 0.2, 0.5, 0.8, 1.0) mixed metal oxides for the WGS reaction was investigated. It was found that the addition of 20 at.% La 3+ in CeO 2 lattice increased significantly the catalytic activity and stability of 0.5 wt%Pt/Ce 0.8 La 0.2 O 2− solid. More precisely, a lower amount of "carbon" was accumulated on the catalyst surface, whereas surface acidity and basicity studies showed that Ce 0.8 La 0.2 O 2− had the highest concentration of labile oxygen and acid sites, and the lowest concentration of basic sites compared to the other Ce 1− La O 2− mixed metal oxide supports ( = 0.2, 0.5, 0.8).

Preparation of a Water–Gas Shift Database to Evaluate the Performance of Noble Metal Catalysts Using Theory-Guided Machine Learning

“…In Table , we list all 32 preparation methods with the references in which these methods are utilized. − This number of preparation methods is much higher than the 12 preparation methods reported in the early database prepared by Odabaşı et al 12 preparation methods (index 1–12 in Table ) such as wet impregnation, coprecipitation, deposition precipitation, and incipient to wetness impregnation method can be found in both databases; however, 19 methods (index 13–31 in Table ) such as hydrothermal and liquid-phase reductive deposition can be found in our database only. The significant increase in preparation methods suggests a growing research focus on catalyst design innovation.…”