Electrocatalysis by design: Enhanced electrooxidation of formic acid at platinum nanoparticles–nickel oxide nanoparticles binary catalysts

The study of Pt-based anode catalysis for formic acid full cell

“…This modification resulted in high catalytic activity via direct pathway transform formic acid to CO 2 . which might reduce the accumulation of CO ads on the active sites of Pt, NiO x is believed to against the CO ads poisoning [15]. The catalytic enhancement and the high current density were observed stability.…”

The Origin of Electrocatalytic Activity of Gold Nanoparticles Modified Pt-Based Surfaces Towards Formic Acid Oxidation

“…All electrodes showed a broad peak at about 2θ = 25°which is associated with carbon support (002). From the other hand, Pt/GC (curve b) and Au/Pt/GC (curve c) electrodes show the typical characteristic peaks for Pt (110), (200), (220), and (311), which demonstrates that the catalyst has a face-centered cubic (fcc) structure [2][3][4][5][6]. Bare Pt ( Fig.…”

“…The electrochemical treatment of polished GC electrode was performed by anodic polarization in 0.5 M H 2 SO 4 at 2.25 V for various times [10]. The real surface area of platinum deposit (A Pt ) was estimated using the charge of Hydrogen adsorption/ desorption in cyclic voltammograms (from −0.2 to 0.15 V) of Pt/GC and Pt/GC ox electrodes, see Table 1 [2][3][4][5][6]. The electrocatalytic activities of the prepared electrodes Figure 1A, B depicts that oxidation of GC leads to a formation and growth of oxide layer, causing higher roughness and more defects on the surface as indicated from the EDAX analysis (see inset of each image).…”

“…An Ag/ AgCl/KCl (sat) and a spiral Pt wire were used as reference and counter electrodes, respectively. PtNPs and AuNPs were electrodeposited on polished (assigned as GC) or electrochemically treated GC (assigned as GCox) surfaces as describe elsewhere [2][3][4][5][6]. The electrochemical treatment of polished GC electrode was performed by anodic polarization in 0.5 M H 2 SO 4 at 2.25 V for various times [10].…”

“…Of these, the DFAFCs are attractive candidate to replace methanol and hydrogen fuel cells as a promising candidate for portable and mobile applications, due to the unique advantages of FA as a fuel [1,2]. Nevertheless, DFAFCs experience a severe problem where the catalytic activity of the Pt anodes, on which the FA electro-oxidation (FAO) proceeds, ceases with time, due to the accumulation of the poisoning CO intermediate resulting from the "non-faradaic" dissociation of FA (i.e., dehydration pathway) [3][4][5]. Therefore, the development of efficient and stable anodes overcoming the CO poisoning for FAO is a central issue.…”