Graphene oxide nanoplatforms to enhance catalytic performance of iron phthalocyanine for oxygen reduction reaction in bioelectrochemical systems

Oliveira, Maida Aysla Costa de; Mecheri, Barbara; D’Epifanio, Alessandra; Placidi, E.; Arciprete, F.; Valentini, Federica; Perandini, Alessando; Valentini, Veronica; Licoccia, Silvia

doi:10.1016/j.jpowsour.2017.02.009

Cited by 76 publications

(36 citation statements)

References 55 publications

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“…Due to the low durability and high cost, platinum-based materials are less common [ 17 , 18 ]. Although PGM-free catalysts based on transition metals such as Fe, Mn, Co and Ni [ 19 , 20 ], have high performance and durability in long run experiments, their production cost still remains high [ 21 ]. Carbonaceous-based catalysts, on the other hand, are preferred to PGM and PGM-free and well utilized for MFCs cathodes [ 16 , 22 , 23 ], mainly due to their lower cost and despite their lower electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Scalability of self-stratifying microbial fuel cell: Towards height miniaturisation

Walter

Santoro

Greenman

et al. 2019

Bioelectrochemistry

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The scalability of bioelectrochemical systems is a key parameter for their practical implementation in the real-world. Up until now, only urine-fed self-stratifying microbial fuel cells (SSM-MFCs) have been shown to be scalable in width and length with limited power density losses. For practical reasons, the present work focuses on the scalability of SSM-MFCs in the one dimension that has not yet been investigated, namely height. Three different height conditions were considered (1 cm, 2 cm and 3 cm tall electrodes). The normalised power density of the 2 cm and 3 cm conditions were similar either during the durability test under a hydraulic retention time of ≈39 h (i.e. 15.74 ± 0.99 μW.cm −3 ) and during the polarisation experiments (i.e. 27.79 ± 0.92 μW.cm −3 ). Conversely, the 1 cm condition had lower power densities of 11.23 ± 0.07 μW.cm −3 and 17.73 ± 3.94 μW.cm −3 both during the durability test and the polarisation experiment, respectively. These results confirm that SSM-MFCs can be scaled in all 3 dimensions with minimal power density losses, with a minimum height threshold for the electrode comprised between 1 cm and 2 cm.

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Section: Introductionmentioning

confidence: 99%

Scalability of self-stratifying microbial fuel cell: Towards height miniaturisation

Walter

Santoro

Greenman

et al. 2019

Bioelectrochemistry

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“…Recently the usage of carbonaceous materials like activated carbon (AC) [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], carbon nanotubes (CNT) [54], [55], carbon nanofibers (CNF) [56], [57], [58], [59], graphene [60], [61], [62], [63] and modified carbon black [64], [65] in the cathodes has greatly increased. Those materials possess high surface area, electrical conductivity, mechanical strength and resistance to corrosion, moreover they are commercially readily available and very economical to use for large-scale applications [66].…”

Section: Introductionmentioning

confidence: 99%

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

Kodali

Santoro

Herrera

et al. 2017

Journal of Power Sources

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M1-M2-N-C bimetallic catalysts with M1 as Fe and Co and M2 as Fe, Co, Ni and Mn were synthesized and investigated as cathode catalysts for oxygen reduction reaction (ORR). The catalysts were prepared by Sacrificial Support Method in which silica was the template and aminoantipyrine (AAPyr) was the organic precursor. The electro-catalytic properties of these catalysts were investigated by using rotating ring disk (RRDE) electrode setup in neutral electrolyte. Fe-Mn-AAPyr outperformed Fe-AAPyr that showed higher performances compared to Fe-Co-AAPyr and Fe-Ni-AAPyr in terms of half-wave potential. In parallel, Fe-Co-AAPyr, Co-Mn-AAPyr and Co-Ni-AAPyr outperformed Co-AAPyr. The presence of Co within the catalyst contributed to high peroxide production not desired for efficient ORR. The catalytic capability of the catalysts integrated in air-breathing cathode was also verified. It was found that Co-based catalysts showed an improvement in performance by the addition of second metal compared to simple Co- AAPyr. Fe-based bimetallic materials didn't show improvement compared to Fe-AAPyr with the exception of Fe-Mn-AAPyr catalyst that had the highest performance recorded in this study with maximum power density of 221.8 ± 6.6 μWcm−2. Activated carbon (AC) was used as control and had the lowest performances in RRDE and achieved only 95.6 ± 5.8 μWcm−2 when tested in MFC.

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“…AC is cheap, commercially available and durable in long‐terms operations but still performances remain low. PGM‐free are based on M−N−C with M as earth abundant transition metals (e. g. Mn, Fe, Co and Ni) and they showed high stability and performances compared to Pt and AC . Recently, Fe was showed to have higher performances compared to Mn, Co and Ni in both rotating ring disk electrode (RRDE) and MFCs experiments .…”

Section: Introductionmentioning

confidence: 99%

Microbial Desalination Cells with Efficient Platinum‐Group‐Metal‐Free Cathode Catalysts

et al. 2017

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An iron‐nitrogen‐carbon‐based catalyst was used at the cathode of a microbial desalination cell (MDC) and compared with platinum (Pt) and an activated carbon (AC) cathode. The Fe‐N−C catalyst was prepared by using nicarbazin (NCB) as the organic precursor through a sacrificial support method (SSM). Rotating ring disk electrode (RRDE) experiments show that Fe‐NCB had a higher electrocatalytic activity compared to AC and Pt. The utilization of Fe‐NCB in the cathode substantially improved the performance output with an initial maximum power density of 49±2 μW cm−2 in contrast to Pt and AC catalysts, which show lower values of 34±1 and 23.5±1.5 μW cm−2, respectively. After four cycles, Fe‐NCB catalyst lost 15 % of its initial performance, but still was 1.3 and 1.8 times more active than Pt and AC, respectively. Solution conductivity inside the desalination chamber (DC) decreased by 46–55 % with every cycle. The pH of the cathodic chamber and the DC increased to 10–11, owing to the production of OH− during the oxygen reduction reaction and the migration of OH− into the DC. Chemical organic demand decreased by 73–83 % during each cycle. It was shown that Fe‐NCB and Pt had a similar coulombic efficiency (CE) of 39±7 % and 38±2 %, whereas AC had lower CE (24±5 %).

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Graphene oxide nanoplatforms to enhance catalytic performance of iron phthalocyanine for oxygen reduction reaction in bioelectrochemical systems

Cited by 76 publications

References 55 publications

Scalability of self-stratifying microbial fuel cell: Towards height miniaturisation

Scalability of self-stratifying microbial fuel cell: Towards height miniaturisation

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

Microbial Desalination Cells with Efficient Platinum‐Group‐Metal‐Free Cathode Catalysts

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