Synergistic enhancement of formic acid electro-oxidation on PtxCuy co-electrodeposited binary catalysts

Polyvinyl alcohol‐modified graphene oxide as a support for bimetallic Pt–Pd electrocatalysts to enhance the efficiency of formic acid oxidation

“…R ct , R s , and C 1 revealed the charge transfer resistance relating to formic acid oxidation, solution resistance, and double‐layer capacitance, respectively. Mainly, R ct, which is equivalent to the polarization resistance of the electrochemical system, is defined by the diameter of the extrapolated semicircle in the Nyquist diagram, and the smaller the semicircle diameter is, the smaller R ct , and consequently, the higher kinetics of the oxidation 51,52 . However, the lowest R ct (657.4 Ω) was obtained for the 6Pt/PVA/GO electrode compared with the other catalysts.…”

“…the smaller the semicircle diameter is, the smaller R ct , and consequently, the higher kinetics of the oxidation. 51,52 However, the lowest R ct (657.4 Ω) was obtained for the 6Pt/PVA/GO electrode compared with the other catalysts.…”

Pronounced effect of yttrium oxide on the activity of Pd/rGO electrocatalyst for formic acid oxidation reaction

“…Smaller charge transfer resistance (R ct ) and subsequently greater oxidation kinetics are derived from smaller semicircle diameter. 63,64 When compared to the other catalysts, the Pd 6 Y 4 /rGO has the lowest R ct (∼135 U) showing a fast reaction kinetics towards formic acid oxidation. The comparative result indicates that the Pd based electrocatalyst with optimized ratio between Pd and Y (Pd 6 Y 4 /rGO) probably promotes the quick charge transference at the electrode/electrolyte junction.…”

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

“…1,15 Thanks to the pioneer work of Capon and Parson, who used differential electrochemical mass spectrometry (DEMS) and provided evidence for a dual path mechanism for formic acid electro-oxidation (FAO); 16 direct dehydrogenation (desirable) to yield CO 2 and indirect dehydration (undesirable) to produce CO intermediate species that is because of its strong adsorption, the Pt surface became poisoned. 16–20 The Pt surface tends to mechanistically catalyze FAO via the cleavage of the C–O and C–H bonds mostly at low potentials, whereas the O–H bond is quickly cleaved at high potentials. 21 Among the most inspected platinum group metals, Pd-based electrocatalysts have exhibited better FAO activities through the preferential dehydrogenation pathway than those based on Pt.…”