Borohydride electrochemical oxidation on carbon-supported Pt-modified Au nanoparticles

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

doi:10.1016/j.jpowsour.2009.09.036

Cited by 50 publications

(22 citation statements)

References 34 publications

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“…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.

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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

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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.

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“…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

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“…The carbon-supported Pt nanoparticle (Pt-NP-AC) was prepared according to literature [41] as follows: 5 mL solution (0.056 g of PtCl 4 salt dissolved in HCl (37% w/w)) added into 800 mL of deionized water and stirred vigorously. Then, 10 mL of solution containing 100 mg of sodium citrate (Na 3 C 6 H 5 O 7 ·2H 2 O), 30 mg NaBH 4 and 100 mg sodium citrate was added quickly and stirred for 1h.…”

Section: Preparation Of Pt-np-acmentioning

confidence: 99%

Modification of platinum nanoparticles loaded on activated carbon and activated carbon with a new chelating agent for solid phase extraction of some metal ions

Ghaedi

Noormohamadi

Asfaram

et al. 2016

Journal of Molecular Liquids

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Borohydride electrochemical oxidation on carbon-supported Pt-modified Au nanoparticles

Cited by 50 publications

References 34 publications

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

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

Modification of platinum nanoparticles loaded on activated carbon and activated carbon with a new chelating agent for solid phase extraction of some metal ions

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