Structure–activity relationships of Cu–ZrO₂ catalysts for CO₂ hydrogenation to methanol: interaction effects and reaction mechanism

Abstract

A systematic study on the Cu–ZrO2 catalysts with different oxygen vacancy concentrations and interaction gives a new approach for understanding the reaction mechanism of CO2 hydrogenation to methanol.

Highly Efficient Photocatalytic Z-Scheme Hydrogen Production over Oxygen-Deficient WO3–x Nanorods supported Zn0.3Cd0.7S Heterostructure

“…Oxygen vacancies also influences magnetic 16 , photocatalytic 17 , optical 18 , wettability 19 , and electrical 20 , properties of the catalyst. In a recent study, it is discovered that the oxygen vacancies improves the overall conductivity and enhances the adsorption of reactants on its surface for organic conversions 21 . Additionally, oxygen deficient metal oxide greatly enhances the visible-light driven hydrogen production by trapping the photo-induced charges and preventing the electron-hole recombination 22 .…”

Clean hydrogen generation and storage strategies via CO 2 utilization into chemicals and fuels: A review

“…The optimal rate constant and activation energy during HCOOH formation in the presence of Cu‐based heterogeneous catalyst are 2.57 × 10 −2 min −1 and 16.24 kJ mol −1 , respectively. Wang et al performed activity and selectivity measurements through CO 2 hydrogenation reaction for methanol production in a high‐pressure fixed‐bed flow stainless steel reactor. About 1.0 g of catalyst is first packed into stainless steel tubular reactor prior to its dilution with quartz sand.…”

The Promotional Effects of ZrO2 and Au on the CuZnO Catalyst Regarding the Durability and Activity of the Partial Oxidation of Methanol

“…For all the catalysts, the H 2 /Cu ratio is ca. 1.0 (1.02-1.00), which indicates full reduction of CuO to Cu 0 [39]. Figure 6a is the TPR profile of CuO, which shows a board reduction profile at 200-250 • C, with a main reduction peak α at around 233 • C. Sloczynski et al [40] and Velu et al [41] indicated α peak might be formed from the reduction of Cu + or crystallized copper oxide to metallic Cu.…”

“…For all the catalysts, the H2/Cu ratio is ca. 1.0 (1.02-1.00), which indicates full reduction of CuO to Cu 0 [39]. Figure 6a is the TPR profile of CuO, which shows a board reduction profile at 200-250 °C, with a main reduction peak α at around 233 °C.…”