Amine axial ligand-coordinated cobalt phthalocyanine-based catalyst for flow-type membraneless hydrogen peroxide fuel cell or enzymatic biofuel cell

High performance of the flow-type one-compartment hydrogen peroxide fuel cell using buckypaper and narrow fuel pathway under physiological conditions

“…According to previous studies, the hydrogen peroxide fuel cell (HPFC) can be fabricated as a one-compartment shape that does not need a membrane to separate both electrodes and used aqueous H 2 O 2 fuel, indicating that the simple membraneless structure can allow the small cell volume to achieve a high energy density and the long lifespan of the fabricated cell. 2,17–20 However, H 2 O 2 from the PECWS studies until now is known for having relatively low concentration of 1–20 mM even in over 3 h operation, 21–23 implying that the tiny and high-performance HPFC for low concentration of H 2 O 2 fuel is needed for the actual use in municipal application. In addition, most HPFC introduced to operate in acidic and alkaline conditions for higher open-circuit voltage (OCV) and the absence of proper catalysts under neutral conditions, 24–27 implying that HPFC operating under neutral conditions should be used as the alternative of hydrogen fuel cell in a particular situation, such as working close to people and highly explosive or corrosive circumstances.…”

“…In addition, most HPFC introduced to operate in acidic and alkaline conditions for higher open-circuit voltage (OCV) and the absence of proper catalysts under neutral conditions, 24–27 implying that HPFC operating under neutral conditions should be used as the alternative of hydrogen fuel cell in a particular situation, such as working close to people and highly explosive or corrosive circumstances. 18,20 In recent years, several types of HPFCs driven in neutral or physiological conditions have been introduced but the performances are not enough to use for practical use. For example, Ji et al demonstrated that the HPFCs using Vit B 12 -based anode has 23.8 μW cm −2 maximum power density (MPD), 18 and An et al showed 37.0 μW cm −2 using cobalt phthalocyanine-based anode with 10 mM H 2 O 2 fuel under physiological conditions.…”

“…For example, Ji et al demonstrated that the HPFCs using Vit B 12 -based anode has 23.8 μW cm −2 maximum power density (MPD), 18 and An et al showed 37.0 μW cm −2 using cobalt phthalocyanine-based anode with 10 mM H 2 O 2 fuel under physiological conditions. 20…”

“…28,32,33 To mitigate this problem, new attempts using undesirable H 2 O 2 as the electron-mediating molecules and fuels have been introduced recently. 18,20,32,34 According to related studies, the bio-mimic anodic and cathodic catalyst can decompose H 2 O 2 molecules with the generation of power by hydrogen peroxide oxidation reaction (HPOR) and hydrogen peroxide reduction reaction (HPRR) under physiological conditions. 18,20 However, the power of the suggested cells has been reported to be 13–37 μW cm −2 .…”

“…18,20,32,34 According to related studies, the bio-mimic anodic and cathodic catalyst can decompose H 2 O 2 molecules with the generation of power by hydrogen peroxide oxidation reaction (HPOR) and hydrogen peroxide reduction reaction (HPRR) under physiological conditions. 18,20 However, the power of the suggested cells has been reported to be 13–37 μW cm −2 . 18,20 Thus, this type of EBCs also needs a higher performance electrode for HPOR and HPRR.…”