Electrochemical dissolution of Pt-Pd-Ru alloys

Mechanistic effects of blending formic acid with ethanol on Pd activity towards formic acid oxidation in acidic media

“…In this study, we showed that the presence of ethanol could change the FAO oxidation mechanism and inhibits the IDPW. However, the long-term instability of Pd/C catalyst in acidic media 29,40,41 makes it difficult to differentiate between the catalyst poisoning versus catalyst instability as a reason behind the Pd catalyst deactivation with cycling, using CV technique. catalyst is found to lose 58.5, 33.3, and 16.5% of its surface area aer 100 cycles when the 0.39, 0.05, and À0.3 V were used as upper potential, respectively.…”

Self-assembled TiO2 Nanopore-Confined Growth of Pd NPs on Pristine Graphene for Superior Electrocatalytic Performance toward Formic Acid Oxidation

“…1,3 Furthermore, its stability requires enhancement because of the high tendency for Pd NPs to aggregate, the easy electrochemical dissolution of metallic Pd under acidic conditions, and CO poisoning. 1,9,10 With a highly conductive and high-surface-area 2-D π− conjugated structure, graphene could be an ideal support of Pd to boost its catalytic performance toward formic acid oxidation reaction (FAOR) by greatly improving its dispersion and create ultrafast electron conducting paths. 3,11 It also exhibits a much higher chemical/electrochemical corrosion resistance compared to conventional carbon materials including those used frequently in commercial Pd/C 2,12 In addition, the high thermal conductivity and superior mechanical flexibility and strength could make it promising for practical DFAFC applications.…”

“…Direct formic acid fuel cells (DFAFCs) hold great promise for energy conversion because of their high open circuit voltage, low operating temperature, low fuel crossover, and easy fuel storage. − Pd is attractive as an anode catalyst since it is more active and CO-tolerant than Pt, the most commonly used one in DFAFCs. − However, it is frequently more difficult to obtain small nanoparticles (NPs) for a large number of active sites compared to Pt due to its lower work function. , In addition, its intrinsic catalytic activity is still restricted by its low CO tolerance. , Furthermore, its stability requires enhancement because of the high tendency for Pd NPs to aggregate, the easy electrochemical dissolution of metallic Pd under acidic conditions, and CO poisoning. ,, …”

A Selective Separation of Platinum Group Metals from the Fe-PGM Alloy Using Electrodeposition Combined with Electrochemical Dealloying

“…5 Although there are many reports on the electrochemical dissolution of pure PGM metallic electrodes, there are only a few papers published on the subject of electrochemical dissolution of ternary Pt-Pd-Ru noble metal alloys. 6 On the European market, a significant portion of the recalled car catalysts, come from diesel vehicles due to their high silicon carbide (SiC) content. According to industry sources in the platinum metals recovery sector, processing this type of material is more challenging compared to those from gasoline vehicles.…”