Modification with platinum of silver-deposited nickel wire electrodes for electrocatalytic oxidation of alcohols

Codeposition of Platinum and Gold on Nickel Wire Electrodes via Galvanic Replacement Reactions for Electrocatalytic Oxidation of Alcohols

“…7 The difficulty in the same approach, i.e., immersing Ni wire in aqueous solutions of K 2 PtCl 4 or K 2 PtCl 6 , had prevented us to report the results, although afterward it was found that the predeposition of Ag on Ni wire was effective in modifying Pt. 10 Because the present approach shows that the PtAu/Ni wire electrodes significantly increase the electrocatalytic oxidation currents for ethanol and other alcohols, the electrochemical properties of the present PtAu/Ni wire electrodes are discussed by carefully comparing the CV responses with those reported until now. Some specific features of the present PtAu/Ni wire electrodes are presented including a disadvantage that the current decreases in repeated scans, although the behaviors in repeated scans are unclear in some previous works.…”

“…We are studying the modification or deposition of noble metals, such as Au and Pd, utilizing galvanic replacement reactions, and reported several results in recent years. − The deposition of Au could be performed on Ni and Ti wire electrodes, which was reported together with their possibility in electroanalysis. The deposition of Pd could be performed on Ni wire and Ni microparticles, so that the thus-prepared Pd-deposited Ni materials were found to be useful for the electrocatalytic oxidation of ethanol in alkaline solutions. , Furthermore, the codeposition of Pd and Au on Ni wire was studied, and it was found that the deposition of PdAu was significantly promoted by treating Ni wire in aqueous solutions containing both K 2 PdCl 4 and HAuCl 4 .…”

“…Before we explored the codeposition of Pt and Au on Ni wire, we had reported that the deposition of single component of Pt on Ni wire was not easy in comparison with the cases of Pd or Au on Ni wire . The difficulty in the same approach, i.e., immersing Ni wire in aqueous solutions of K 2 PtCl 4 or K 2 PtCl 6 , had prevented us to report the results, although afterward it was found that the predeposition of Ag on Ni wire was effective in modifying Pt …”

New Insight into N,S-Doped Carbon Nanosheets Embedded with Ni/NiO Nanocluster Electrocatalysts Derived from Conjugated Polymers for the Oxidation of 2-Propanol to Acetone

“…The iPrOH fuel cell, because of its compatibility with LOHCs and potential for high fuel cell performance, might be a game changer in the push toward a hydrogen-based energy economy, sidestepping the challenges of transporting and storing molecular H Although there are several noble metal-based catalysts employed in iPrOH oxidation reactions (iPrOR) such as Pt, 3 Pt−Ir−Ru, 4 and Pt−Ag 5 have low overpotential, but abundance and price exclude their commercialization and some reports on Pt−Ni 6 and other bimetallic systems. 7,8 Transition metal oxides (TMOs) have attracted considerable attention in electrocatalysis due to their redox activity, high surface reactivity, and its tunable electronic structure. 6,9 Nonetheless, optimizing the electrocatalytic performance of NiO-based catalysts remains a difficult challenge to enhance activity, selectivity, and stability.…”

“…Although there are several noble metal-based catalysts employed in iPrOH oxidation reactions (iPrOR) such as Pt, Pt–Ir–Ru, and Pt–Ag have low overpotential, but abundance and price exclude their commercialization and some reports on Pt–Ni and other bimetallic systems. , Transition metal oxides (TMOs) have attracted considerable attention in electrocatalysis due to their redox activity, high surface reactivity, and its tunable electronic structure. , Nonetheless, optimizing the electrocatalytic performance of NiO-based catalysts remains a difficult challenge to enhance activity, selectivity, and stability. Jafarian et al reported the poly­(Ni II {sal-1,2-pn­(3-OMe) 2 }) complex for iPrOR under alkaline conditions but with less stability .…”