Roundtable on Foundational Science for Carbon-Neutral Hydrogen Technologies (Technology Status Document)

Myers, Deborah; Ahluwalia, R.K.; Allendorf, Mark D.; Atwater, Harry A.; Autrey, Thomas; Ayers, Katherine E.; Borup, Rodney L.; Bowden, Mark E.; Chou, Katherine; Furukawa, Hiroyasu; Gennett, Thomas; Goldmeer, Jeffrey; Hodge, Bri‐Mathias; Krause, Theodore; Long, Jeffery D.; Lord, Anna C. Snider; Maness, Pin‐Ching; McDaniel, Anthony H.; Patel, Pinakin; Pivovar, Bryan S.; Marchi, Christopher San; Singh, Prabhakar P.; Stavila, Vitalie; Hu, John

doi:10.2172/1809223

Cited by 3 publications

(1 citation statement)

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“…Hydrogen-fed proton exchange membrane fuel cells (PEMFCs) hold great potential in mitigating environmental and energy crises. − However, their commercialization on a large scale is primarily hampered by the presence of costly platinum group metal (PGM) catalysts for their oxygen reduction reaction (ORR) on the cathode side. , In this regard, it is imperative to fabricate economical and earth-abundant PGM-free alternatives. Among them, transition metal and nitrogen-doped carbonaceous materials, for example, Fe/N/Carbon, are the most efficient materials. − With a decade of effort, substantial advancement has been introduced in Fe/N/Carbon catalysts which still exhibit lesser activity than the commercially reported Pt/Carbon catalysts. − At 8-fold higher catalyst loading (4 vs 0.5 mg cm –2 using 20 wt % Pt/Carbon catalysts at 0.1 mg Pt cm –2 loadings), the activation polarization performance of the Fe/N/Carbon cathode can be comparable with that of the low-loading Pt/C cathode. , However, the thick layer of the catalyst (100 μm in Fe/N/Carbon vs 10 μm in Pt/Carbon) results in severe mass-transfer problems and thus significant polarization loss at large current densities. − To solve this issue, the Fe/N/Carbon catalytic activity should be further enhanced.…”

Section: Introductionmentioning

confidence: 99%

General Carbon-Supporting Strategy to Boost the Oxygen Reduction Activity of Zeolitic-Imidazolate-Framework-Derived Fe/N/Carbon Catalysts in Proton Exchange Membrane Fuel Cells

Zhang

Yang

Jiang

et al. 2022

ACS Appl. Mater. Interfaces

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The oxygen reduction reaction (ORR) activity of the Fe/N/Carbon catalysts derived from the pyrolysis of zeolitic-imidazolate-framework-8 (ZIF-8) has been still lower than that of commercial Pt-based catalysts utilized in the proton exchange membrane fuel cells (PEMFCs) due to low density of accessible active sites. In this study, an efficient carbon-supporting strategy is developed to enhance the ORR efficiency of the ZIF-derived Fe/N/Carbon catalysts by increasing the accessible active site density. The enhancement lies in (i) improving the accessibility of active sites via converting dodecahedral particles to graphene-like layered materials and (ii) enhancing the density of FeNx active sites via suppressing the formation of nanoparticles as well as providing extra spaces to host active sites. The optimized and efficient Fe/N/Carbon catalyst shows a half-wave potential (E 1/2) of 0.834 V versus reversible hydrogen electrode in acidic media and produces a peak power density of 0.66 W cm–2 in an air-fed PEMFC at 2 bar backpressure, outperforming most previously reported Pt-free ORR catalysts. Finally, the general applicability of the carbon-supporting strategy is confirmed using five different commercial carbon blacks. This work provides an effective route to derive Fe/N/Carbon catalysts exhibiting a higher power density in PEMFCs.

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Section: Introductionmentioning

confidence: 99%

General Carbon-Supporting Strategy to Boost the Oxygen Reduction Activity of Zeolitic-Imidazolate-Framework-Derived Fe/N/Carbon Catalysts in Proton Exchange Membrane Fuel Cells

Zhang

Yang

Jiang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

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An Overview of Energy and Exergy Analysis for Green Hydrogen Power Systems

Hayati,

Majidi-Gharehnaz,

Biabani

et al. 2024

Green Hydrogen in Power Systems

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The Impact of Oxidation-Induced Degradation on Materials Used in Hydrogen-Fired Microturbines

Romedenne,

Pillai,

Dryepondt

et al. 2023

Journal of Engineering for Gas Turbines and Power

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Hydrogen-fueled microturbines are being considered as part of the future green microgrid. However, the use of hydrogen as a fuel presents new challenges for selection and development of suitable high temperature materials for hydrogen combustion. The burning of hydrogen is expected to result in higher operating temperatures and higher than typically observed water vapor contents in exhaust gases versus burning natural gas. In the present work, foil specimens of various Fe- and Ni-based alloys were oxidized in air + 10 % H2O and air + 60% H2O for up to 5,000 h at 700 °C to simulate the exhaust atmosphere of natural gas and hydrogen-fueled microturbines. The impact of alloy composition and water vapor content on the oxidation/ volatilization induced loss of wall thickness was experimentally evaluated. Enhanced external oxidation and volatilization of Cr2O3 and Ti-doped Cr2O3 scales was observed in air + 60% H2O compared to air + 10% H2O. No significant impact of the higher water vapor content was observed on Al2O3 scales formed on Fe-based alumina forming alloys. Lifetime modeling was employed to predict the combined effects of water vapor content, gas flow rates, temperature and alloy composition on the oxidation-induced lifetime of the investigated materials.

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Roundtable on Foundational Science for Carbon-Neutral Hydrogen Technologies (Technology Status Document)

Cited by 3 publications

References 0 publications

General Carbon-Supporting Strategy to Boost the Oxygen Reduction Activity of Zeolitic-Imidazolate-Framework-Derived Fe/N/Carbon Catalysts in Proton Exchange Membrane Fuel Cells

General Carbon-Supporting Strategy to Boost the Oxygen Reduction Activity of Zeolitic-Imidazolate-Framework-Derived Fe/N/Carbon Catalysts in Proton Exchange Membrane Fuel Cells

An Overview of Energy and Exergy Analysis for Green Hydrogen Power Systems

The Impact of Oxidation-Induced Degradation on Materials Used in Hydrogen-Fired Microturbines

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