LaNi4.5Al0.5 alloy doped with Au used as anodic materials in a borohydride fuel cell

Pd Modified MmNi50.6Co10.2Mn5.4Al1.2 Alloy as the Catalyst of NaBH4 Electrooxidation

“…During the chronoamperometry test, the generated hydrogen was collected by a water replacement method, and the obtained volume was used to calculate the utilization efficiency of NaBH 4 . The increased small rod-like particles could be attributed to the formation of oxides of lanthanum and other rare earth elements during the self-reduction reaction with Pd ion [28]. All potentials were referred to the Ag/AgCl, KCl reference electrode.…”

“…All potentials were referred to the Ag/AgCl, KCl reference electrode. The enrichment of Ni on the alloy surface might be caused by the dissolution of Mn and Al elements [28]. Figure 1 shows the SEM images of the hydrogen storage alloy (before and after activation) and the Pd/AB 5 catalyst.…”

“…The main problems encountered in the borohydride electrooxidation are the incomplete (less than eight electrons) electrooxidation of BH 4 and its hydrolysis to H 2 , both lead to the reduction of BH 4 utilization, and thus result in the decrease of energy density of DBFC. In order to improve the catalytic performance of hydrogen storage alloys, activation treatments, and surface modifications of hydrogen storage alloys have been investigated [28][29][30][31][32]. In order to overcome these problems, anode electro-catalysts with low catalytic activity for BH 4 hydrolysis and high activity for BH 4 complete electrooxidation are needed.…”

“…Noble metals and hydrogen storage alloys have been widely used as the electrocatalysts for the oxidation of NaBH 4 [14,[22][23][24][25][26][27]. Recently, Wang and colleagues [28] reported that the catalytic performance of LaNi 4.5 Al 0.5 alloy was enhanced by surface modification with Au. Among the broad variety of hydrogen storage alloys, the AB 5 and -[ * ] Corresponding author, caodianxue@hrbeu.edu.cn Abstract A Pd-modified hydrogen storage alloy was investigated as the anode electrocatalyst of direct borohydride fuel cell.…”

Study of CoO as an anode catalyst for a membraneless direct borohydride fuel cell

“…The use of noble metals (platium, palladium and gold) [4][5][6], transition metals (nickel and copper) [7] and rare earth hydrogen storage alloys (AB 5 -and AB 2 -type alloys) [8][9][10] has been reported. The development of high performance electrode materials for fuel cells, however, is still one of the most attractive areas of electrochemical research.…”