100
reversal catalytic principle, that is, oxidation of formic acids as well as reduction of
CO 2. This electrodeposited Pd@Pt catalyst is able to reduce CO 2 to formic acid
beginning of −0.05 V vs. RHE, compared to a strong beginning potential of −1.2 V
vs. RHE towards formation of formic acid through CO 2 reduction for a bare
palladium electrode under the same pH. The Pd@Pt electrode is furthermore capable of reducing bicarbonate not to mention to reversibly convert CO 2 into formic
acid and vice versa (Kortlever et al. 2014).
Ruud Kortlever and associate (2015) additionally announced the blend of palladium, platinum, and carbon in various stoichiometric ratio (Pd − Pt/C) nanoparticles
and reduced carbon dioxide using these nano-electrocatalysts. In the result, at 0.0
volts versus reversible hydrogen electrode and 0.02 volts versus reversible hydrogen
electrode, the beginning reduction potential and the theoretical equilibrium potential are recorded, respectively. Likewise, 88% faradaic productivity for 1 h at −0.4 V
versus reversible hydrogen electrode and ~5 mA/cm
2
average current density was
observed for Pd 70 Pt 30 /C catalyst (Kortlever et al. 2015).
Similarly Xiaoquan Min and co-author (2015) demonstrated 50–80 mA HCO 2
−
/
mg palladium mass activities of palladium/carbon catalyst, at less than 200 mV
overpotential in aqueous bicarbonate solutions. Electrokinetic measurements are in
accordance with a mechanism at location where the rate-determining step is electrohydrogenation. In both the cases of Ruud Kortlever and Xiaoquan Min, the CO
poisons HCO 2
−
synthesis at low overpotential, but CO can be removed by passing
air exposure to bring back activity (Kortlever et al. 2015; Min and Kanan 2015).
Carbon nanomaterials treated with ammonia plasma and doping of nitrogen after
adsorption of polyethylenimine have been used by Sheng Zhang and team (2014a,
b). Noteworthy improvements in performance in the direction of electrocatalytic
CO 2 reduction to formate are observed like reduction of overpotential and increasing current density and efficiency due to such treatment (Zhang et al. 2014a, b).
Sheng Zhang and the group (2014a, b) also prepared and evaluated high-surface
tin oxide nanocrystals as electrocatalysts to reduce CO 2 to formic acid. Selective
formic acid production occurs in excess at 340 mV. In aqueous solutions of NaHCO 3 ,
93% faradaic yields are achieved for formic acid with high stability, and in graphene
supports, current density is greater than 10 mA/cm
2
; thus noteworthy CO 2 reduction
capacities are achieved (Zhang et al. 2014a, b).
Qinggong Zhu and team (2016) described ionic liquid, acetonitrile, and H 2 O
ternary electrolytes in electrocatalysis reduction of CO 2 . Pb/Sn electrode efficiency
of electrochemical reduction of CO 2 increased to extremely high by addition of
small amounts of this electrolyte mixture. Much higher, about 37.6 mA/cm
2
of partial current density at 91.6% faradaic efficiency for formic acid is reported, in which
the use of homogeneous and noble metal electrocatalysts is included (Zhu et al.
2016; Watkins and Bocarsly 2014; Sun et al. 2014; Rosen et al. 2011; Aresta et al.
2014; DiMeglio and Rosenthal 2013; Hollingsworth et al. 2015a, b].
Hongzhou Yang et al. (2017) describe a three new sections of electromechanical
cell configuration with high current density and the ability to directly produce natural formic acid in the concentration range of 5–20 wt% on faradaic yield. Imidazole
ionomer in an anion exchange membrane and nanoparticle Sn GDE cathode is
U. Fegade and G. Jethave
reversal catalytic principle, that is, oxidation of formic acids as well as reduction of
CO 2. This electrodeposited Pd@Pt catalyst is able to reduce CO 2 to formic acid
beginning of −0.05 V vs. RHE, compared to a strong beginning potential of −1.2 V
vs. RHE towards formation of formic acid through CO 2 reduction for a bare
palladium electrode under the same pH. The Pd@Pt electrode is furthermore capable of reducing bicarbonate not to mention to reversibly convert CO 2 into formic
acid and vice versa (Kortlever et al. 2014).
Ruud Kortlever and associate (2015) additionally announced the blend of palladium, platinum, and carbon in various stoichiometric ratio (Pd − Pt/C) nanoparticles
and reduced carbon dioxide using these nano-electrocatalysts. In the result, at 0.0
volts versus reversible hydrogen electrode and 0.02 volts versus reversible hydrogen
electrode, the beginning reduction potential and the theoretical equilibrium potential are recorded, respectively. Likewise, 88% faradaic productivity for 1 h at −0.4 V
versus reversible hydrogen electrode and ~5 mA/cm
2
average current density was
observed for Pd 70 Pt 30 /C catalyst (Kortlever et al. 2015).
Similarly Xiaoquan Min and co-author (2015) demonstrated 50–80 mA HCO 2
−
/
mg palladium mass activities of palladium/carbon catalyst, at less than 200 mV
overpotential in aqueous bicarbonate solutions. Electrokinetic measurements are in
accordance with a mechanism at location where the rate-determining step is electrohydrogenation. In both the cases of Ruud Kortlever and Xiaoquan Min, the CO
poisons HCO 2
−
synthesis at low overpotential, but CO can be removed by passing
air exposure to bring back activity (Kortlever et al. 2015; Min and Kanan 2015).
Carbon nanomaterials treated with ammonia plasma and doping of nitrogen after
adsorption of polyethylenimine have been used by Sheng Zhang and team (2014a,
b). Noteworthy improvements in performance in the direction of electrocatalytic
CO 2 reduction to formate are observed like reduction of overpotential and increasing current density and efficiency due to such treatment (Zhang et al. 2014a, b).
Sheng Zhang and the group (2014a, b) also prepared and evaluated high-surface
tin oxide nanocrystals as electrocatalysts to reduce CO 2 to formic acid. Selective
formic acid production occurs in excess at 340 mV. In aqueous solutions of NaHCO 3 ,
93% faradaic yields are achieved for formic acid with high stability, and in graphene
supports, current density is greater than 10 mA/cm
2
; thus noteworthy CO 2 reduction
capacities are achieved (Zhang et al. 2014a, b).
Qinggong Zhu and team (2016) described ionic liquid, acetonitrile, and H 2 O
ternary electrolytes in electrocatalysis reduction of CO 2 . Pb/Sn electrode efficiency
of electrochemical reduction of CO 2 increased to extremely high by addition of
small amounts of this electrolyte mixture. Much higher, about 37.6 mA/cm
2
of partial current density at 91.6% faradaic efficiency for formic acid is reported, in which
the use of homogeneous and noble metal electrocatalysts is included (Zhu et al.
2016; Watkins and Bocarsly 2014; Sun et al. 2014; Rosen et al. 2011; Aresta et al.
2014; DiMeglio and Rosenthal 2013; Hollingsworth et al. 2015a, b].
Hongzhou Yang et al. (2017) describe a three new sections of electromechanical
cell configuration with high current density and the ability to directly produce natural formic acid in the concentration range of 5–20 wt% on faradaic yield. Imidazole
ionomer in an anion exchange membrane and nanoparticle Sn GDE cathode is
U. Fegade and G. Jethave