Carbon Nanofiber-Based Palladium/Zinc Catalysts for the Hydrogenation of Carbon Dioxide to Methanol at Atmospheric Pressure

Abstract

Palladium/zinc catalysts supported on carbon nanofibers (CNFs) have been used to study the catalytic performance in the hydrogenation of CO 2 to obtain methanol at atmospheric pressure. The carbon nanofiber support has an influence on the nature of the PdZn alloy formed. The effect of the Pd/Zn molar ratio on the PdZn alloy particle size was analyzed. Lower Pd/Zn molar ratio leads to higher PdZn alloy particle size, which was associated with higher selectivity toward methanol. The influence of the type of nanofiber (platelet or fishbone) on the catalytic behavior was also studied and compared with that of a conventional Pd/ZnO catalyst. The palladium/zinc catalyst supported on platelet nanofiber was considered to be a good candidate for the hydrogenation of carbon dioxide to methanol.

Plasmon‐Assisted Photothermal Catalysis of Low‐Pressure CO2 Hydrogenation to Methanol over Pd/ZnO Catalyst

“…However, the high‐pressure condition is a significant barrier for industry to overcome because first, elevating pressure increases operational cost and second, the catalytic procedure at high pressure cannot be coupled with the upstreaming low‐pressure CO 2 /H 2 mixture (at or below 20 bar) produced from low‐temperature aqueous phase reforming of biomass derivatives . To explore low‐pressure or even atmospheric‐pressure methanol synthesis, which has become an attractive topic in recent years, Pd based catalysts have been developed by a few groups, due to the high capability of H 2 dissociation over Pd . However, these systems still suffer from low methanol yield at low pressure.…”

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

“…The third reduction peak that appeared at 316-380 °C can be assigned to the reduction of Cu2O (I). Finally, the peaks at higher temperatures are typically associated with the gasification of activated carbon and the reduction of surface oxygenated groups on the activated carbon support [21,22]. The temperature of the most intense consumption peak (Tmax) is given in Table 1.…”

“…This configuration allows lower temperatures (around 90 • C) as compared to catalytic CO 2 hydrogenation processes (above 250 • C) [21,[29][30][31].…”

Low-temperature electrocatalytic conversion of CO2 to liquid fuels: effect of the Cu particle size

“…The third reduction peak appeared at 316-380 ºC can be assigned to the reduction of Cu2O(I). Finally, the peaks at higher temperatures are typically associated with the gasification of activated carbon and the reduction of surface oxygenated groups on the activated carbon support [21,22]. The temperature of the most intense consumption peak (Tmax) is given in Table 1.…”

“…The configuration used herein is advantageous in that it allows direct supply of H + (more reactive than H2) to the cathodic side of the cell. This configuration allows lower temperatures (around 90 ºC) as compared to catalytic CO2 hydrogenation processes (above 250 ºC) [21,[29][30][31].…”