Electrochemical reduction of carbon dioxide on hydrogen-storing materials.

Highly selective palladium-copper bimetallic electrocatalysts for the electrochemical reduction of CO2 to CO

“…According to the previous works [38], the conversion of CO 2 to COOH * in the first step, inhibited by weak CO 2 adsorption/binding, and the release of CO from the surface in the last step, inhibited by strong CO binding, can be regarded as the rate-determining step; whereas the conversion of COOH * to CO * is usually easy during the second step. Compared with Pd nanoparticles, we think that the presence of Cu in the bimetallic PdCu nanoparticles significantly altered the nature of the electro-active species and thus adsorbate-binding energy [29,37]. In fact, it has been confirmed that the heat of adsorption of CO could be lowered on the PdCu(111) surface compared with the Pd(111) due to the structural factor, i.e.…”

“…Furthermore, one point should be noticed that the mass activity of Pd NPs was measured based on porous electrode, which can be directly used in practical compact electrolysis cells. Moreover, compared with the bulk Pd electrode, the Pd-based catalysts consisted of the bi-or mono-metallic nanoparticles had higher electrocatalytic activity towards CO 2 reduction, which was quite different from those in bulk metals, such as FE CO < 6% over Pd wire electrode [36] and FE CO < 25% over Pd wire electrode modified with Cu at all different copper coverage [37]. Hence, these PdCu/C nanocatalysts displayed significant potential in practical applications of the CO 2 electrocatalytic reduction process.…”

CO2‐to‐HCOOH Electrochemical Conversion on Nanostructured CuxPd100−x/Carbon Catalysts

“…[26][27][28][29] More significantly, cooperation between Pd and Cu materials has recognized especially in CO 2 electrolysis due to their bimetallic capability of promoting formate production with high efficiency at low overpotentials. [30][31][32] As suggested by Savéant, nanoscaling may change the reaction selectivity. [20] Thus, the example of electrochemical hydridation of CO 2 into HCOO À versus H 2 formation in aqueous media is an ideal example to prove this concept.…”

“…Recently, palladium is reported to be a cathode that can catalyze formate production with overpotential lower than 200 mV; CO was formed as side product, causing surface poisoning [26–29] . More significantly, cooperation between Pd and Cu materials has recognized especially in CO 2 electrolysis due to their bimetallic capability of promoting formate production with high efficiency at low overpotentials [30–32] . As suggested by Savéant, nanoscaling may change the reaction selectivity [20] .…”

Development of differential electrochemical mass spectrometry (DEMS) technique for electrocatalysis studies

“…They observed an improvement in ethylene production in a Cu:Ag alloy mixture. Ohkawa et al, 58 worked with Cu:Pd based on the strategy of using hydrogen storing metals like Pd.…”