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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Poisoning of Pt/γ-Al 2 O 3 Aqueous Phase Reforming Catalysts by Ketone and Diketone-Derived Surface Species
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Inelastic Neutron Scattering Observation of Plasma-Promoted Nitrogen Reduction Intermediates on Ni/γ-Al 2 O 3
Plasma-assisted catalysis is an emerging technology for the atmospheric pressure and low bulk gas temperature synthesis of ammonia from molecular nitrogen and hydrogen. Direct evidence for plasma-induced surface reaction intermediates relevant to ammonia production, including surface hydrides and NH x (x = 1, 2, 3) species, has remained elusive. In this work, we report inelastic neutron scattering (INS) observations of alumina-supported Ni particles after treatment with N 2 and H 2 plasmas. INS experiments reveal the presence of NH x species and hydrides on Ni sites after exposure to sequential N 2 and H 2 plasma treatments. By separating exposure, we exclude the presence of plasma-phase reactions and demonstrate that these species are generated through plasma-facilitated surface reactions. Computed synthetic INS spectra of NH 3 , NH 2 and NH adsorbates on Ni support the experimental assignments of surface intermediates. The results directly implicate plasma stimulation of dinitrogen in generation of surface-bound nitrogen that participates in further hydrogenation reactions driven either thermally or with H 2 plasma.
Effect of Precursors on Trimetallic Ruthenium-Based Catalysts Supported on γ-Al 2 O 3 Pellets for Low-Temperature Ammonia Decomposition
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Reply to Comment by Mandel et al. on “Numerically Bounded Linguistic Probability Schemes Are Unlikely to Communicate Uncertainty Effectively”
Abstract We thank the Comment's authors for their considered critique of our paper. We respond to their main criticisms and hope that this discussion motivates further consideration of communication strategies for event attribution analyses.
Phase Transitions of Fe-, Al- and Ca-Bearing Orthopyroxenes at High Pressure and High Temperature: I
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Elasticity of Hydrated Al-Bearing Stishovite and Post-Stishovite: Implications for Understanding Reg
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Thermal Equations of State of Corundum and Rh[subscript 2]O[subscript 3] (II)-Type Al[subscript 2]O[
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Machine learning and high-throughput computational guided development of high temperature oxidation-resisting Ni-Co-Cr-Al-Fe based high-entropy alloys
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Revisiting the charge compensation mechanisms in LiNi[subscript 0.8]Co[subscript 0.2;#8722;y]Al[subscript y]O[subscript 2] systems
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Synthesis of SrTiO 3 and Al-doped SrTiO 3 via the deep eutectic solvent route
SrTiO 3 and aluminum-doped SrTiO 3 are synthesized by calcination of metal salts dissolved in a deep eutectic solvent (DES) without any post-synthesis treatment.