Electrocatalytic conversion of CO2 on a polypyrrole electrode under high pressure in methanol

Reduction of CO2 under high pressure and high temperature on Pb-granule electrodes in a fixed-bed reactor in aqueous medium

“…In all other cases, the H 2 -evolution is promoted. In fact, comparable behaviours had also been observed during the CO 2 reduction in our previous studies on conducting polymer electrodes [19][20][21][22][23]. The results obtained on Pb granule electrodes in the fixed-bed reactor at different high-pressure values are presented in Table 1.…”

“…For the reduction of CO 2 , most of the metals in the periodic table of the elements [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and synthetic metals (conducting polymers) such as polyaniline and polypyrrole [19][20][21][22][23][24] have been used as electrode material in different electrolytes and in various electrochemical cells. Most of the cited works here have been done in H-cells with metal plate electrodes.…”

Microstructural surface changes of electrodeposited Pb on gas diffusion electrode during electroreduction of gas‐phase CO2

“…The presence of the needle-like structures, previously reported in this study, supported more production of formic acid by presenting a large surface area for the reduction reaction at the initial 1000 s. As these structures dissolve with prolonged reduction, the rate of production of formic acid also becomes low, as more current might be used up for other side reactions such as hydrogen evolution, as previously reported. [1,7] Another possible reason for the decrease in formic acid concentration could be its (electro) chemical oxidation during the reaction. Similarly, Lee and Tak [10] reported that the structural changes of the copper electrode occurred during CO 2 reduction and revealed that amorphous carbon formed on the copper surface after the reduction, which reduced the active surface area and consequently their reactivity for CH 4 and C 2 H 4 production.…”

“…[8] The reduction process necessitates the use of specific metal catalysts due to their product selectivity. [1] Electrode materials other than metals, especially polymers such as polypyrrole [7] and polyaniline, [9] have been applied successfully during CO 2 reduction and have been shown to be responsible for product selectivity. However, a variety of metals have different reactivities and stabilities and hence their catalytic activities may be affected by reduction media, size and shape of catalyst or prevailing conditions that can lead to their inactivation or changes in form or morphologies.…”

Simultaneous electrocatalytic reduction of dinitrogen and carbon dioxide on conducting polymer electrodes

“…Different methods were proposed for CO 2 reduction with homogeneous and heterogeneous systems [11][12][13][14][15][16][17]. Among these methods, electrochemical reduction appears to be the most appropriate one, which is why the electro-reduction of CO 2 to valuable products became the aim of many studies with substantial interest in the recent time [18].…”