Ni–Pt/C as anode electrocatalyst for a direct borohydride fuel cell

Geng, Xiaoying; Zhang, Huamin; Wei, Ye; Ma, Yuanwei; Zhong, Hexiang

doi:10.1016/j.jpowsour.2008.09.010

Cited by 97 publications

(33 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ni-Pt alloys demonstrated even higher catalytic activity than Au-Pt [12]. In a study by Geng et al [13], a DBFC employing Ni-Pt/C as the anode catalyst gave much higher peak power density than that using Ni/C or Pt/C. Another alloying strategy is to combine a metal such as Ru which mainly completes the hydrolysis of borohydride with a second metal such as Pt which can oxidise hydrogen and also borohydride.…”

Section: Introductionmentioning

confidence: 99%

Performance Study of Direct Borohydride Fuel Cells Employing Polyvinyl Alcohol Hydrogel Membrane and Nickel‐Based Anode

Choudhury

Sahai

et al. 2011

Fuel Cells

View full text Add to dashboard Cite

A direct borohydride fuel cell (DBFC) employing a polyvinyl alcohol (PVA) hydrogel membrane and a nickel‐based composite anode is reported. Carbon‐supported platinum and sputtered gold have been employed as cathode catalysts. Oxygen, air and acidified hydrogen peroxide have been used as oxidants in the DBFC. Performance of the PVA hydrogel membrane‐based DBFC was tested at different temperatures and compared with similar DBFCs employing Nafion® membrane electrolytes under identical conditions. The borohydride–oxygen fuel cell employing PVA hydrogel membrane yielded a maximum peak power density of 242 mW cm–2 at 60 °C. The peak power densities of the PVA hydrogel membrane‐based DBFCs were comparable or a little higher than those using Nafion® 212 membranes at 60 °C. The fuel efficiency of borohydride–oxygen fuel cell based on PVA hydrogel membrane and Ni‐based composite anode was found to be between 32 and 41%. The cell was operated for more than 100 h and its performance stability was recorded.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance Study of Direct Borohydride Fuel Cells Employing Polyvinyl Alcohol Hydrogel Membrane and Nickel‐Based Anode

Choudhury

Sahai

et al. 2011

Fuel Cells

View full text Add to dashboard Cite

show abstract

“…It should also be noted that the peak potential of BH − 4 electro-oxidation slowly shifted towards the positive with increased Cr 3+ concentration in the electrolyte solution. Some studies have reported [9,11,15,16] that the peak potential of BH , suggesting that 0.2 mol L −1 was the optimum concentration for Ni-Cr catalysts prepared by electro-deposition. Figure 6(a) presents the CV curves of BH − 4 using the Ni catalyst and Figure 6(b)-(d) shows Ni-Cr catalysts prepared at deposition potentials of 0.100, −0.100, and −0.300 V respectively, while other preparation conditions were maintained as constant.…”

Section: Resultsmentioning

confidence: 97%

The preparation and performance of high activity Ni-Cr binary catalysts for direct borohydride fuel cells

Yan

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

Ni-Cr binary anode catalysts used in direct borohydride fuel cells (DBFCs) were prepared using a constant potential electrodeposition method. Compared with pure metal Ni catalysts, the electro-oxidation currents of borohydride ions (BH − 4 ) more than doubled when using Ni-Cr binary catalysts under the same conditions. The enhanced activity of the Ni-Cr binary catalysts could be attributed to the change in distribution of BH 4 − ions on the surface of the Ni electrode. This is due to Cr electrodeposits, which allows a greater number of hydrogen atoms to catalyze from each tetrahedron BH -4 ion. The performance of Ni-Cr binary catalysts could also be improved by optimizing the electrodeposition conditions. The results show that Ni-Cr binary catalysts are optimally prepared using an electrodeposition method of 1s with a Cr 3+ concentration of 0.2 mol L −1 and a potential of −0.100 V. ), theoretical conversion efficiencies (91%), non-toxic catalysts, and the convenient transportation of fuel [1]. These devices employ an alkaline solution of sodium borohydride (NaBH 4 ) as fuel and oxygen or hydrogen peroxide as the oxidant. The DBFC converts the chemical energy stored in the borohydride ion (BH − 4 ) directly into electricity by redox processes. DBFCs not only overcome the disadvantages of production, storage and transportation issues related to the use of hydrogen gas, but also eliminate safety concerns regarding the use of hydrogen gas as fuel in traditional fuel cells. However, the degree of the direct electro-oxidation reaction of borohydride ions (BH To take advantage of the various benefits of different catalyst materials and to improve performance, many researchers have been engaged in developing composite anodic materials such as bi-metallic and multi-metallic materials. The activity and stability of bi-metallic catalysts are better than those of mono-metallic catalysts [10]. Considering the high cost of noble metals such as Au, Pt, and Pd, it is worthwhile to investigate non-precious metal catalysts for use as anode catalysts. Among non-precious metals, nickel is considered a promising candidate for the direct electrooxidation of BH − 4 . Improved performance of DBFCs has been achieved by using anode loading Ni-based composite catalysts on nickel foams [11]. In this paper, Ni-Cr binary anode catalysts for DBFCs were prepared using a constant Ni-Cr binary catalysts, borohydride ion, electro-oxidation, fuel cell

show abstract

“…The permeability (P) of BH 4 − was calculated via the method described elsewhere [11]. The DBFC single cell fabrication and cell performance evaluation system have been reported previously by our group [12,13]. Pt/C was used as electrocatalyst in both anode and cathode.…”

Section: Methodsmentioning

confidence: 99%

Polymer electrolyte based on chemically stable and highly conductive alkali-doped polyoxadiazole for direct borohydride fuel cell

Mai

Zhang

et al. 2011

Electrochemistry Communications

Self Cite

View full text Add to dashboard Cite

Ni–Pt/C as anode electrocatalyst for a direct borohydride fuel cell

Cited by 97 publications

References 32 publications

Performance Study of Direct Borohydride Fuel Cells Employing Polyvinyl Alcohol Hydrogel Membrane and Nickel‐Based Anode

Performance Study of Direct Borohydride Fuel Cells Employing Polyvinyl Alcohol Hydrogel Membrane and Nickel‐Based Anode

The preparation and performance of high activity Ni-Cr binary catalysts for direct borohydride fuel cells

Polymer electrolyte based on chemically stable and highly conductive alkali-doped polyoxadiazole for direct borohydride fuel cell

Contact Info

Product

Resources

About