Preparation of non-precious metal catalysts for PEMFC cathode from pyrolyzed vitamin B12

Chang, Shinn‐Jen; Hsu, Hsiang‐Chen; Huang, Hsin‐Chih; Wang, Chenhao; Du, He-Yun; Chen, Li‐Chyong; Lee, Jye-Fu; Chen, Kuei‐Hsien

doi:10.1016/j.ijhydene.2012.03.081

Cited by 25 publications

(8 citation statements)

References 35 publications

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“…[41][42][43][44] Chang et al and Huang et al studied the ORR activities that corresponded to the change in oxidation state of Co in corrin-and corrole-based macrocyclic compounds after high-temperature pyrolysis. 23,24,45 Nørskov et al suggested that the ORR activity depends on the binding energies of the adsorbed oxygen (O*) and hydroxyl (OH*) on the surface of the catalyst. 46 In pristine B12 that pyrolyzed at a desired temperature, the central cobalt that is coordinated with N 4 -chelate is partially or completely changed; producing a new catalytic site offers a much higher ORR activity and stability.…”

Section: Resultsmentioning

confidence: 99%

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High stability pyrolyzed vitamin B12 as a non-precious metal catalyst of oxygen reduction reaction in microbial fuel cells

Wang

Huang

et al. 2013

RSC Adv.

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Non-precious metal catalysts are favored for use in microbial fuel cells (MFCs) as they catalyze the oxygen reduction reaction (ORR) at the cathode and are low-cost. In this work, pyrolyzed Vitamin B12 (py-B12/C), supported by carbon black, was utilized as the cathode catalyst in solid phase MFC. The py-B12/C has the highest proportion of quaternary N-type nitrogen than pristine B12, which promotes ORR activity during the pyrolysis at 700 uC, at which temperature the ORR ability is maximized. Py-B12/C has an electron transfer number of 3.85 in O 2 -saturated 0.05 M phosphate buffered saline (PBS) solution, which is very close to that of Pt/C, which is 3.89. Steady potential tests of py-B12/C and Pt/C reveal that the former does not decay but the latter decays by 24% in 100 h. According to an MFC test, Pt/C has a higher voltage initially but this rapidly falls to zero after ten days owing to the blocking effect of OH ads species on Pt surface. Notably, an MFC using py-B12/C exhibits excellent power density of 22.6 mW m 22 and an operational period of more than 30 days, which is longer than that using Pt/C.

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Section: Resultsmentioning

confidence: 99%

“…[20][21][22] Recently, Chang et al utilized vitamin B12, supported by carbon black was pyrolyzed in the nitrogenatmosphere at 700 uC. 23,24 It exhibited high ORR activity when applied to the cathode of the PEM fuel cell. Based on these studies, this work considers the use of vitamin B12 as a candidate cathode catalyst in the MFC.…”

Section: Introductionmentioning

confidence: 99%

High stability pyrolyzed vitamin B12 as a non-precious metal catalyst of oxygen reduction reaction in microbial fuel cells

Wang

Huang

et al. 2013

RSC Adv.

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“…The complete N x -structure has been proved that it can improve the ORR activity from our previous results. [17][18][19]44,[49][50][51] These results can offer powerful evidence to explain why the best ORR activity was observed in L/C catalyst-700 W-2 min.…”

Section: Electrochemical Measurements and Preparation Of Catalyst Inkmentioning

confidence: 99%

Microwave-assisted pyrolysis of Pachira aquatica leaves as a catalyst for the oxygen reduction reaction

et al. 2020

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“…Cell performance was higher and hydrogen peroxide yield was lower compared to previous methods of Co-based catalysis in PEMFCs. 13,14 Here, we report the use of melamine, which has a high N/C ratio, as a nitrogen precursor mixed with vitamin B12 as a catalyst. Compared to other Cobased catalysis methods reported so far, the pyrolyzed nitrogenincorporating vitamin B12, which is supported by carbon black (py-B12-M/C), provides stronger catalytic activity in the ORR via the direct four-electron reduction pathway.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to other Cobased catalysis methods reported so far, the pyrolyzed nitrogenincorporating vitamin B12, which is supported by carbon black (py-B12-M/C), provides stronger catalytic activity in the ORR via the direct four-electron reduction pathway. 13,14 Therefore, the proposed catalysis method improves fuel cell performance.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of melamine-treated vitamin B12 as a non-precious metal catalyst for oxygen reduction reaction

et al. 2014

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Active, inexpensive non-precious metal substitutes for current Pt-based catalysis are needed to reduce the cost of proton exchange membrane fuel cells (PEMFC). In this work, pyrolysis of a carbon black-supported melamine-treated vitamin B12 (py-B12-M/C) catalyst for the oxygen reduction reaction (ORR) establishes that the surface nitrogen content and nitrogen-carbon ratio strongly affect ORR activity. Under optimal conditions, the number of transferred electrons in py-B12-M/C and the hydrogen peroxide yield of its ORR are 3.95 and 2.5%, respectively.

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Preparation of non-precious metal catalysts for PEMFC cathode from pyrolyzed vitamin B12

Cited by 25 publications

References 35 publications

High stability pyrolyzed vitamin B12 as a non-precious metal catalyst of oxygen reduction reaction in microbial fuel cells

High stability pyrolyzed vitamin B12 as a non-precious metal catalyst of oxygen reduction reaction in microbial fuel cells

Microwave-assisted pyrolysis of Pachira aquatica leaves as a catalyst for the oxygen reduction reaction

Pyrolysis of melamine-treated vitamin B12 as a non-precious metal catalyst for oxygen reduction reaction

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