Depression of hydrogen evolution during operation of a direct borohydride fuel cell

Li, Z.P.; Liu, B.H.; Zhu, Jun; Suda, S.

doi:10.1016/j.jpowsour.2006.09.037

Cited by 82 publications

(35 citation statements)

References 22 publications

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“…These CV features demonstrated that the AgNi surface is more favorable for hydrogen adsorption than pure Ag surface. As suggested in previous work [4][5][6][9][10][11], the electrochemical oxidation of an BH − 4 ion proceeds through stepwise breakdown of its four B-H bonds involving the formation of adsorbed hydrogen atom during each step. As a result, the metal surfaces with higher affinity for hydrogen adsorption, such as Pt, Ni and hydrogen storage alloys, exhibited strong catalytic activity for borohydride oxidation.…”

Section: Behaviors Of Ag and Agni Compositementioning

confidence: 74%

“…The major problem is the hydrolysis of BH − 4 ions spontaneously during discharge on a variety of electrocatalysts, causing decreasing coulombic efficiency and poor utilization of BH − 4 [7][8][9][10]. For example, the faradic efficiency of BH − 4 is less than 50% on hydrogen storage alloys [11], 50% at most on nickel [12,13], and below 50% on Pt-catalyzed anode at low polarization [6].…”

Section: Introductionmentioning

confidence: 99%

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Agni-catalyzed anode for direct borohydride fuel cells

Feng

Dong

Cao

et al. 2007

International Journal of Hydrogen Energy

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Section: Behaviors Of Ag and Agni Compositementioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Agni-catalyzed anode for direct borohydride fuel cells

Feng

Dong

Cao

et al. 2007

International Journal of Hydrogen Energy

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“…It was observed that borohydride electro-oxidation underwent an eight-electron process on Pt-Ru nanoparticles [14]. Nickel, as a non-precious metal, has received a lot of attention as the catalyst for electro-oxidation of BH 4 - [15][16][17][18].…”

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

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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.

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“…It is clear that Au does not promote the borohydride hydrolysis but works as a good vehicle for the borohydride oxidation. Bard and co-workers [25] also state that Au does not promote the borohydride hydrolysis, but recent works [26][27][28] are not really sure about it. In the present study, fast bubbles nucleation due to borohydride hydrolysis were observed for Pt and Pd, but not for Au.…”

Section: Goldmentioning

confidence: 99%