Investigation of platinum and palladium as potential anodic catalysts for direct borohydride and ammonia borane fuel cells

Selected Review of the Degradation of Pt and Pd‐based Carbon‐supported Electrocatalysts for Alkaline Fuel Cells: Towards Mechanisms of Degradation

“…Earlier studies performed in the condition of the brine electrolysis or of DBFC clearly showed that both Pt/C (and Ag/C and AgPt/C ) and Pd/C were not immune to operation in high pH aqueous electrolytes. In any case, the nanoparticles dispersion over the carbon support, their extent of agglomeration, size and number per unit area of carbon were severely affected by rather short‐term operation.…”

“…The spectra were continuously acquired during an accelerated stress test (AST) consisting of 150 cyclic voltammograms (CV) cycles (v = 100 mV s -1 ) between 0.1 and 1.23 V vs. RHE at T = 25°C in Ar-purged 0.1 mol L -1 NaOH. The FTIR data were plotted using relative Earlier studies performed in the condition of the brine electrolysis [54] or of DBFC [77] clearly showed that both Pt/C (and Ag/C [78] and AgPt/C [54]) and Pd/C were not immune to operation in high pH aqueous electrolytes. In any case, the nanoparticles dispersion over the carbon support, their extent of agglomeration, size and number per unit area of carbon were severely affected by rather short-term operation.…”

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

“…The relative stability of Pd/C materials (even in reducing conditions) versus similar Pt/C catalysts, at least for 150 cycles of AST, does guarantee their stability in the time frame of kinetic studies and therefore legitimates their utilization in such kinetic studies, as recently performed in Ref. 38.…”

“…[29][30][31][32][33][34][35][36][37][38][39][40] Special emphasis can be made on fuels of the boron hydride family (e.g. sodium borohydride and ammonia borane), for which Pd-based electrocatalysts are able to outperform Pt/C.…”

“…sodium borohydride and ammonia borane), for which Pd-based electrocatalysts are able to outperform Pt/C. 29,31,38 This has opened new hopes in DLAFC technology using palladium (or palladium-alloys) as anode catalysts to valorize complex fuels, and in particular borohydride and borane-based chemical compounds. However, the use of Pd-based catalysts in DLAFCs has barely been evaluated in terms of durability.…”