Effect of Synthesis Route on Oxygen Reduction Reaction Activity of Carbon-Supported Hafnium Oxynitride in Acid Media

Chisaka, Mitsuharu; Suzuki, Yuta; Iijima, Tomohiro; Sakurai, Yasuhisa

doi:10.1021/jp2068107

Cited by 36 publications

(21 citation statements)

References 56 publications

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“…The most investigated metals are Fe, Co, and Ni, but some attempts to prepare partially oxidized metal (Ta, Ti, Zr, Hf, etc.) carbonitride or oxynitride samples have been carried out by the groups of Ota [32,33], Sakurai [34], and Savadogo [35,36]. However, the latter catalysts were neither investigated for their methanol tolerance properties, nor used at the cathode of a DMFC, thus they will be not discussed in the present review.…”

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

et al. 2018

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Direct methanol fuel cells (DMFCs) are emerging technologies for the electrochemical conversion of the chemical energy of a fuel (methanol) directly into electrical energy, with a low environmental impact and high efficiency. Yet, before this technology can reach a large-scale diffusion, specific issues must be solved, in particular, the high cost of the cell components. In a direct methanol fuel cell system, high capital costs are mainly derived from the use of noble metal catalysts; therefore, the development of low-cost electro-catalysts, satisfying the target requirements of high performance and durability, represents an important challenge. The research is currently addressed to the development of metal-nitrogen-carbon (M-N-C) materials as cheap and sustainable catalysts for the oxygen reduction reaction (ORR) in an acid environment, for application in polymer electrolyte fuel cells fueled by hydrogen or alcohol. In particular, this mini-review summarizes the recent advancements achieved in DMFCs using M-N-C catalysts. The presented analysis is restricted to M-N-C catalysts mounted at the cathode of a DMFC or investigated in rotating disk electrode (RDE) configuration for the ORR in the presence of methanol in order to study alcohol tolerance. The main synthetic routes and characteristics of the catalysts are also presented.

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Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

et al. 2018

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“…Therefore, it is highly desirable to develop alternative no-precious metal catalysts with high oxygen reduction reaction activity 6 10 . Various promising alternative ORR catalysts, including transition metal oxides 11 12 13 14 , transition metal nitrides/carbides 15 16 17 , transition metal oxynitrides 18 19 20 , and metal-free heteroatom-doped carbon materials 21 22 23 , have been explored. Transition-metal carbides have been well studied for catalytic applications because of high electric conductivity, corrosion resistance and “platinum” like behavior for the chemisorptions of hydrogen and oxygen 24 .…”

mentioning

confidence: 99%

Nitrogen-doped Graphene-Supported Transition-metals Carbide Electrocatalysts for Oxygen Reduction Reaction

Chen

Liu

Zhou

et al. 2015

Sci Rep

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A novel and facile two-step strategy has been designed to prepare high performance bi-transition-metals (Fe- and Mo-) carbide supported on nitrogen-doped graphene (FeMo-NG) as electrocatalysts for oxygen reduction reactions (ORR). The as-synthesized FeMo carbide -NG catalysts exhibit excellent electrocatalytic activities for ORR in alkaline solution, with high onset potential (−0.09 V vs. saturated KCl Ag/AgCl), nearly four electron transfer number (nearly 4) and high kinetic-limiting current density (up to 3.5 mA cm−2 at −0.8 V vs. Ag/AgCl). Furthermore, FeMo carbide -NG composites show good cycle stability and much better toxicity tolerance durability than the commercial Pt/C catalyst, paving their application in high-performance fuel cell and lithium-air batteries.

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“…It is highly desirable to investigate non‐noble‐metal‐based materials as alternative cathode catalysts. Various non‐noble‐metal catalysts (NNMCs), such as transition‐metal chacogenides,2 macrocycles,3–5 transition‐metal oxides,6 transition‐metal carbides/nitrides,7–9 and transition‐metal oxynitrides,10–13 have been widely studied. Among these NNMCs, catalysts containing cobalt or iron have shown the most promising catalytic activities for ORR 4.…”

mentioning

confidence: 99%

Cobalt Molybdenum Oxynitrides: Synthesis, Structural Characterization, and Catalytic Activity for the Oxygen Reduction Reaction

Cao¹,

Veith²,

Diaz³

et al. 2013

Angew Chem Int Ed

142

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A non‐noble metal electrocatalyst has been developed for the oxygen reduction reaction. Carbon‐supported cobalt molybdenum oxynitride was simply prepared by impregnation followed by thermal ammonolysis. The oxynitride electrocatalytic activity nearly matched that of platinum in 0.1 M KOH solution. The catalyst structure and valence have been characterized using complementary local and bulk probes.

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Effect of Synthesis Route on Oxygen Reduction Reaction Activity of Carbon-Supported Hafnium Oxynitride in Acid Media

Cited by 36 publications

References 56 publications

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Nitrogen-doped Graphene-Supported Transition-metals Carbide Electrocatalysts for Oxygen Reduction Reaction

Cobalt Molybdenum Oxynitrides: Synthesis, Structural Characterization, and Catalytic Activity for the Oxygen Reduction Reaction

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