Production of Methanol on PdCu/ATO in a Polymeric Electrolyte Reactor of the Fuel Cell Type from Methane

Abstract

The search for alternatives for converting methane into value-added products has been of great interest to scientific, technological, and industrial society. An alternative to this could be the use of copper-doped palladium catalysts with different proportions supported on metal oxides, such as Sb2O5.SnO2 (ATO) catalysts. These combinations were employed to convert the methane-to-methanol in mild condition using a fuel cell polymer electrolyte reactor. The catalysts prepared presents Pd, CuO, and Sb2O5.SnO2 phases with a mean particle size of about 9 nm. In activity experiments, the Pd80Cu20/ATO indicated maximum power density and maximum rate reaction for methanol production when compared to other PdCu/ATO materials. The use of ATO as a support favored the production of methanol from methane, while PdCu with high copper content demonstrated the production of more oxidized compounds, such as carbonate and formate.

Methane to Methanol Conversion Using Proton-Exchange Membrane Fuel Cells and PdAu/Antimony-Doped Tin Oxide Nanomaterials

“…The cyclic voltammetry of PdAu materials, in different molar ratios in 1.0 m NaOH aqueous solution (scan rate v = 10 mV s −1 ), is presented in Figure 3a. In the ma containing Pd, it is possible to observe in the region of −0.85 and −0.5 V the corresponding to hydrogen adsorption and desorption [36], the Pd/ATO elec presenting the oxide reduction (−0.4 V), and oxide formation (0.05 V). The PdAu electrodes show a shift in the peak positions for the hydrogen adsorption-desor compared to Pd/ATO, which indicates the electronic modification of Pd atoms by A The presence of gold sites near palladium sites can alter the chemical enviro and shift the hydrogen desorption potential to less negative values with an increase gold content in the material (−0.55, −0.57, and −0.59 V for Pd75Au25/ATO, Pd50Au5 and Pd25Au75/ATO, respectively).…”

“…The cyclic voltammetry of PdAu materials, in different molar ratios in 1.0 mol L −1 NaOH aqueous solution (scan rate v = 10 mV s −1 ), is presented in Figure 3a. In the materials containing Pd, it is possible to observe in the region of −0.85 and −0.5 V the peaks corresponding to hydrogen adsorption and desorption [36], the Pd/ATO electrode presenting the oxide reduction (−0.4 V), and oxide formation (0.05 V). The PdAu/ATO electrodes show a shift in the peak positions for the hydrogen adsorption-desorption, compared to Pd/ATO, which indicates the electronic modification of Pd atoms by Au [37].…”

Methane to Methanol Conversion Using PEM Fuel Cell and PdAu/ATO Nanomaterials

“…The cyclic voltammetry of PdAu materials, in different molar ratios in 1.0 mol L -1 NaOH aqueous solution (scan rate v = 10 mV s -1 ), was presented in Figure 3a. In the materials containing Pd, it is possible to observe in the region of -0.85 and -0.5 V the peaks corresponding to hydrogen adsorption and desorption [36], the Pd/ATO electrode presents the oxide reduction (-0.4 V), and oxide formation (0.05 V). The PdAu/ATO electrodes show a shift in the peak positions for the hydrogen adsorptiondesorption, compared to Pd/ATO, which indicates the electronic modification of Pd atoms by Au [37].…”

Recent advances in ambient electrochemical methane conversion to oxygenates using metal oxide electrocatalysts

“…The electrocatalytic oxidation of methane is strongly influenced by potential, and the products of the same catalyst at different potentials can be different. 16,[126][127][128] Electrochemistry is dependent on potential, and in electrocatalytic methane oxidation, the electrolytic voltage is often selected as follows: Oh et al 104 analyzed the impact of potential on a ZrO 2 NT/Co 3 O 4 catalyst. As compared to water oxidation, methane oxidation occurs at a lower initial potential.…”