Original Mechanochemical Synthesis of Non-Platinum Group Metals Oxygen Reduction Reaction Catalysts Assisted by Sacrificial Support Method

Serov, Alexey; Artyushkova, Kateryna; Andersen, Nalin I.; Stariha, Sarah; Atanassov, Plamen

doi:10.1016/j.electacta.2015.02.108

Cited by 86 publications

(86 citation statements)

References 42 publications

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“…Pyridinic nitrogen and metal coordinated to nitrogen have been reported to be important chemical sites for electrocatalytic reactions [58]. Surface oxides have been shown to be an important measure of defects in carbon network which are also very important for electrocatalytic activity [62]. From this standpoint, Fe-AAPyr and Mn-AAPyr supposed to have very similar highest activity among four samples.…”

Section: Resultsmentioning

confidence: 92%

Air Breathing Cathodes for Microbial Fuel Cell using Mn-, Fe-, Co- and Ni-containing Platinum Group Metal-free Catalysts

Kodali

Santoro

Serov

et al. 2017

Electrochimica Acta

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139

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Section: Resultsmentioning

confidence: 92%

Air Breathing Cathodes for Microbial Fuel Cell using Mn-, Fe-, Co- and Ni-containing Platinum Group Metal-free Catalysts

Kodali

Santoro

Serov

et al. 2017

Electrochimica Acta

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139

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“…Fe-AAPyr (AAPyr: aminoantipryne, synthesized by Sacrificial Support Method, developed at University of New Mexico) [14][15][16][17][18][19] was used as a cathode catalyst. The prepared MEAs were used as square shaped working electrodes with an area of 2 × 2 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

Mechanism Study of Hydrazine Electrooxidation Reaction on Nickel Oxide Surface in Alkaline Electrolyte by In Situ XAFS

Sakamoto¹,

Kishi²,

Yamaguchi³

et al. 2016

J. Electrochem. Soc.

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This study introduces a new insight on the mechanism of selective electrooxidation of hydrazine in alkaline media. The catalytic process takes place on nickel oxide surface of a Ni oxide nano-particle decorated carbon support (NiO/C). The catalyst was synthesized by wet impregnation and a liquid reduction procedure followed by thermal annealing. In-situ X-ray absorption fine structure (XAFS) spectroscopy was used to investigate the reaction mechanism for hydrazine electrooxidation on NiO surface. The spectra of X-ray absorption near-edge structure (XANES) of Ni K-edge indicated that adsorption of OH − on Ni site during the hydrazine electrooxidation reaction. Density functional theory (DFT) calculations were used to elucidate and suggest the mechanism of the electrooxidation and specifically propose the localization of electron density from OH − to 3d orbital of Ni in NiO. It is found that the accessibility of Ni atomic sites in NiO structure is critical for hydrazine electrooxidation. Based on this study, we propose a possible reaction mechanism for selective hydrazine electrooxidation to water and nitrogen taking place on NiO surface as it is applicable to direct hydrazine alkaline membrane fuel cells. Diversification of fuel is important to enhance the versatility of fuel cells as viable power devices for the next generation. Liquid fuel such as methanol, ethanol, borohydride, formic acid, 2-propanol, dimethyl ether and hydrazine are liquid chemical substances that include hydrogen and are considered an energy source in which hydrogen is an electron carrier. The advantages of liquid fuels include, but are not limited to high energy density and ease of handling at both the energy supply and demand sides. In the case of liquid fuel, simple/existing infrastructure, such as conventional petrol stations, is sufficient as for fuel supply, and while the geographic and temporal gap between energy supply and receipt are being filled this would allow to concentrate and leveraging off energy contribution to the expansion of and market penetration of fuel cell technology.Direct hydrazine hydrate fuel cells (DHFCs) utilizing an anion exchange membrane have recently attracted attention as a clean power device. Hydrazine contains no carbon and excretes harmless nitrogen and water by theoretical electroreaction and non-platinum group metal (PGM) catalysts such as Fe, Co, and Ni. These catalysts have been demonstrated for both the anode and cathode electrodes as shown Fig. 1a. The fuel cell vehicle equipped with no PGM as catalysts was demonstrated at SPring-8 in 2013. We believe this demonstration of DHFCs as a power device contributes to the reduction of CO 2 emissions and begins to address the fossil fuel resource problem. If zero CO 2 emission fuel cell vehicles (FCVs), are to be deployed using carbon-free liquid fuel, the emissions of CO 2 would be associated only with the liquid fuel manufacturing facility side and the measures of reduction of CO 2 emission by the transportation sector are would be supported by the depl...

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“…The influence of morphology, surface chemistry and ORR of Fe-N-C materials synthesized by adopting the Sacrificial Support Method (SSM) was systematically investigated [41], [42], [43], [44], [45]. It was analytically shown that the microporous structure of materials will improve ORR activity in neutral and high pH because of the accessibility to active sites and removal of products of reaction [41], [42], [43], [44], [45]. Since the removal and capture of H 2 produced in real applications is quite challenging, the Sacrificial Support Method was selected for preparation of the Fe-N-C catalysts for enhancing H 2 degassing.…”

Section: Introductionmentioning

confidence: 99%

Co-generation of hydrogen and power/current pulses from supercapacitive MFCs using novel HER iron-based catalysts

Santoro

Soavi

Arbizzani

et al. 2016

Electrochimica Acta

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Original Mechanochemical Synthesis of Non-Platinum Group Metals Oxygen Reduction Reaction Catalysts Assisted by Sacrificial Support Method

Cited by 86 publications

References 42 publications

Air Breathing Cathodes for Microbial Fuel Cell using Mn-, Fe-, Co- and Ni-containing Platinum Group Metal-free Catalysts

Air Breathing Cathodes for Microbial Fuel Cell using Mn-, Fe-, Co- and Ni-containing Platinum Group Metal-free Catalysts

Mechanism Study of Hydrazine Electrooxidation Reaction on Nickel Oxide Surface in Alkaline Electrolyte by In Situ XAFS

Co-generation of hydrogen and power/current pulses from supercapacitive MFCs using novel HER iron-based catalysts

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