High and robust performance of H<sub>2</sub>O<sub>2</sub> fuel cells in the presence of scandium ion

Yamada, Yusuke; Yoneda, Masaki; Fukuzumi, Shunichi

doi:10.1039/c5ee00748h

Cited by 126 publications

(111 citation statements)

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“…(2)] . H 2 O 2 can be used as a liquid fuel in one‐compartment H 2 O 2 fuel cells . The E 0 value of the two‐electron/two‐proton reduction of O 2 [0.68 V vs. SHE in Eq.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

2017

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The two‐electron reduction of dioxygen with two protons produces hydrogen peroxide, which is directly used as a liquid fuel in hydrogen peroxide fuel cells, whereas the four‐electron reduction of dioxygen is combined with the two‐electron oxidation of hydrogen in hydrogen fuel cells. Platinum (Pt)‐based nanocomposites are the most efficient commercial electrocatalysts for the oxygen reduction reaction (ORR). However, the poor stability, scarcity and high cost of these Pt‐based oxygen electrocatalysts are major barriers for the large‐scale implementation of fuel cell technologies. Replacing noble metal‐based electrocatalysts with highly efficient and inexpensive earth‐abundant metal‐based oxygen electrocatalysts has been of critical importance for practical applications. To develop efficient catalysts for the two‐electron and four‐electron reduction of dioxygen, it is crucially important to clarify the catalytic mechanisms of two‐electron/two‐proton versus four‐electron/four‐proton reduction of dioxygen with earth‐abundant metal complexes. This review focused on the factors that control the two‐electron/two‐proton versus four‐electron/four‐proton reduction of dioxygen by electron donors (one electron reductants) such as ferrocene, catalyzed by earth‐abundant metal complexes such as iron, cobalt, copper, manganese and nickel complexes in the homogeneous phase, by detecting catalytic intermediates, which determine the catalytic pathways of the two‐electron versus four‐electron reduction of dioxygen. The electrocatalytic two‐electron or/and four‐electron reduction of dioxygen with earth‐abundant metal complexes and metal oxides has also been discussed in relation with the homogeneous catalysis.

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“…(2)] . H 2 O 2 can be used as a liquid fuel in one‐compartment H 2 O 2 fuel cells . The E 0 value of the two‐electron/two‐proton reduction of O 2 [0.68 V vs. SHE in Eq.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

2017

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“…7,8 Fukuzumi and co-workers studied the use of different types of iron catalysts for the fabrication of cathodes in H 2 O 2 fuel cells in water. 9,10 …”

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confidence: 99%

High Performance Reduction of H₂O₂ with an Electron Transport Decaheme Cytochrome on a Porous ITO Electrode

Reuillard

Hildebrandt

et al. 2017

J. Am. Chem. Soc.

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The decaheme cytochrome MtrC from Shewanella oneidensis MR-1 immobilized on an ITO electrode displays unprecedented H2O2 reduction activity. Although MtrC showed lower peroxidase activity in solution compared to horseradish peroxidase, the ten heme cofactors enable excellent electronic communication and a superior activity on the electrode surface. A hierarchical ITO electrode enabled optimal immobilization of MtrC and a high current density of 1 mA cm–2 at 0.4 V vs SHE could be obtained at pH 6.5 (Eonset = 0.72 V). UV–visible and Resonance Raman spectroelectrochemical studies suggest the formation of a high valent iron-oxo species as the catalytic intermediate. Our findings demonstrate the potential of multiheme cytochromes to catalyze technologically relevant reactions and establish MtrC as a new benchmark in biotechnological H2O2 reduction with scope for applications in fuel cells and biosensors.

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“…Besides its prominent role as a clean oxidant for synthetic applications, H 2 O 2 obtained from air, water and sunlight therefore can also be exploited as an attractive energy-rich product for reversibly storing chemical bond energy [33,[100][101][102]. The most important role of dioxygen activation by artificial photoenzymes, however, is the controlled generation of catalytically competent metal-peroxo and metal-oxo species [28] driving remarkable mono-and dioxygenase-type substrate conversion processes, which will be briefly discussed in the next section.…”

Section: Figmentioning

confidence: 99%

The concept of photochemical enzyme models – State of the art

Knör

2016

Coordination Chemistry Reviews

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High and robust performance of H₂O₂ fuel cells in the presence of scandium ion

Abstract: Decomposition of H2O2 on an electrode was suppressed in the presence of Lewis acids.

Cited by 126 publications

References 38 publications

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

High Performance Reduction of H₂O₂ with an Electron Transport Decaheme Cytochrome on a Porous ITO Electrode

The concept of photochemical enzyme models – State of the art

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High and robust performance of H2O2 fuel cells in the presence of scandium ion

Abstract: Decomposition of H2O2 on an electrode was suppressed in the presence of Lewis acids.

Cited by 126 publications

References 38 publications

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

Mechanisms of Two‐Electron versus Four‐Electron Reduction of Dioxygen Catalyzed by Earth‐Abundant Metal Complexes

High Performance Reduction of H2O2 with an Electron Transport Decaheme Cytochrome on a Porous ITO Electrode

The concept of photochemical enzyme models – State of the art

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High and robust performance of H₂O₂ fuel cells in the presence of scandium ion

High Performance Reduction of H₂O₂ with an Electron Transport Decaheme Cytochrome on a Porous ITO Electrode