Cathode electrocatalyst selection and deposition for a direct borohydride/hydrogen peroxide fuel cell

Gu, Lifeng; Luo, Nie; Miley, George H.

doi:10.1016/j.jpowsour.2007.05.005

Cited by 155 publications

(87 citation statements)

References 18 publications

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“…Since H 2 O 2 decomposes on various metals, acid is usually added to increase its stability. In a study by Gu et al [22] Au was identified as an effective catalyst which minimises H 2 O 2 decomposition and also resists corrosion.…”

Section: Cell Performance Of Nabh 4 -H 2 O 2 Fuel Cellsmentioning

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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Section: Cell Performance Of Nabh 4 -H 2 O 2 Fuel Cellsmentioning

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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“…Other catalysts reduce oxygen to hydrogen peroxide (Equation (2)), which then chemically decomposes (Equation (4)) leading to a two e − process [31]. Although it is known that Pt and Pt-alloys can catalyze the direct ORR (four e − ), they also increase the total cost of the MFCs and suffer from fast poisoning from sulfide present in wastewater [32,33].…”

Section: Introductionmentioning

confidence: 99%

Carbon-Based Air-Breathing Cathodes for Microbial Fuel Cells

et al. 2016

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Abstract:A comparison between different carbon-based gas-diffusion air-breathing cathodes for microbial fuel cells (MFCs) is presented in this work. A micro-porous layer (MPL) based on carbon black (CB) and an activated carbon (AC) layer were used as catalysts and applied on different supporting materials, including carbon cloth (CC), carbon felt (CF), and stainless steel (SS) forming cathode electrodes for MFCs treating urine. Rotating ring disk electrode (RRDE) analyses were done on CB and AC to: (i) understand the kinetics of the carbonaceous catalysts; (ii) evaluate the hydrogen peroxide production; and (iii) estimate the electron transfer. CB and AC were then used to fabricate electrodes. Half-cell electrochemical analysis, as well as MFCs continuous power performance, have been monitored. Generally, the current generated was higher from the MFCs with AC electrodes compared to the MPL electrodes, showing an increase between 34% and 61% in power with the AC layer comparing to the MPL. When the MPL was used, the supporting material showed a slight effect in the power performance, being that the CF is more powerful than the CC and the SS. These differences also agree with the electrochemical analysis performed. However, the different supporting materials showed a bigger effect in the power density when the AC layer was used, being the SS the most efficient, with a power generation of 65.6 mW·m −2 , followed by the CC (54 mW·m −2 ) and the CF (44 mW·m −2 ).

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“…Even when the temperature was decreased to 22 °C, the cell performance did not recover. This was caused by the increased rate of decomposition of the anolyte and catholyte at high temperature [20], a situation that is therefore necessary to avoid. Figure 3 shows polarization curves of the DBPFC when the anolyte and catholyte were controlled at various temperatures.…”

Section: Effect Of Flow Ratementioning

confidence: 99%

The Performance of a Direct Borohydride/Peroxide Fuel Cell Using Graphite Felts as Electrodes

et al. 2017

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Abstract:A direct borohydride/peroxide fuel cell (DBPFC) generates electrical power by recirculating liquid anolyte and catholyte between the stack and reservoirs, which is similar to the operation of flow batteries. To enhance the accessibility of the catalyst layer to the liquid anolyte/catholyte, graphite felts are employed as the porous diffusion layer of a single-cell DBPFC instead of carbon paper/cloth. The effects of the type of anode alkaline solution and operating conditions, including flow rate and temperature of the anolyte/catholyte, on DBPFC performance are investigated and discussed. The durability of the DBPFC is also evaluated by galvanostatic discharge at 0.1 A·cm −2 for over 50 h. The results of this preliminary study show that a DBPFC with porous graphite electrodes can provide a maximum power density of 0.24 W·cm −2 at 0.8 V. The performance of the DBPFC drops slightly after 50 h of operation; however, the discharge capacity shows no significant decrease.

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Cathode electrocatalyst selection and deposition for a direct borohydride/hydrogen peroxide fuel cell

Cited by 155 publications

References 18 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

Carbon-Based Air-Breathing Cathodes for Microbial Fuel Cells

The Performance of a Direct Borohydride/Peroxide Fuel Cell Using Graphite Felts as Electrodes

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