Preparation and characterization of novel nickel–palladium electrodes supported by silicon microchannel plates for direct methanol fuel cells

Enhanced methanol oxidation and oxygen reduction reactions on palladium-decorated FeCo@Fe/C core–shell nanocatalysts in alkaline medium

“…These catalysts show a better performance in terms of the onset potential for MOR, the oxidation potential, current response and the I f /I b ratio (I f /I b is a useful index for the catalyst's tolerance to carbonaceous species on the catalyst surface and an indication of oxidation of methanol to CO 2 during the anodic scan) with a lesser loading of 1.3 mg. A better I f /I b ratio (4.2) is also observed compared to that (1.89) reported by F. Miao et al 20 for Ni-Pd/Si-MCP nanocomposites for methanol oxidation. MOR and ORR in alkaline media have been studied using Pd-based catalysts.…”

“…The slope of the plot ranged between 0.931 and 1.103 indicating that the reaction order is approximately unity, irrespective of potential. FeCo@Fe@Pd/C shows enhanced catalytic activities for MOR compared to many literature reports [44][45][46][47][48][49][50][51][52][53] as shown in ) showed a lower J f /J b ratio (2.60) indicative of a less active MOR in the anodic path compared to FeCo@Fe@Pd/C. Also, interestingly, despite that the loading of the Pd nanoflowers 52 is about 400 times higher than seen for FeCo@Fe@Pd/C, its J f /J b ratio (B5) is comparable with that of FeCo@Fe@Pd/C.…”

“…In this work, we studied the electrocatalytic properties of this novel core-shell nanocatalyst for fuel cells. The nanocatalysts show significant electrocatalytic properties (compared to some literature reports [16][17][18][19][20] …”

“…MOR and ORR in alkaline media have been studied using Pd-based catalysts. [16][17][18][19][20][21][22][23][24][25][26] We expect that these newly designed core-shell nanocatalysts can also be used as advanced catalysts to enhance electrocatalytic activity in alkaline fuel cells, further extending their applications in direct alkaline alcohol fuel cells. These catalysts are easy to fabricate, and for ORR, they exhibit fast kinetics which can be judged by their high exchange current density value and low Tafel value and they also show a very high resistance to methanol cross over at high concentrations in the cathode region.…”

Pd/Ni Synergestic Activity for Hydrogen Oxidation Reaction in Alkaline Conditions

“…PdNi alloys (Pd 3 Ni, Pd 3 Ni 2 ) on WC, 9 Pt/Pd, Raney-Ni, 10 were tested in HOR. Various forms of the Pd/Ni bimetallic system were studied as anode for direct ethanol, 11-12 direct methanol, 13 direct glucose fuel cells 14 and in electrooxidation reaction of methanol, ethanol and formic acid. [15][16][17] Pd/Ni has been investigated as fuel cell cathode for oxygen reduction, as well.…”