Topic
Noble metal
About: Noble metal is a research topic. Over the lifetime, 15113 publications have been published within this topic receiving 337947 citations.
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TL;DR: The present results, by combined analytical electron microscopy and ab initio calculations, open avenues for processing of noble-metal-containing layered ceramics that have not been synthesized from elemental sources, along with tunable properties such as stable electrical contacts for high-temperature power electronics or gas sensors.
Abstract: Substitution of Si with Au and Ir in Ti3SiC2 through a solid-state diffusion process allows the synthesis of Ti3AuC2, Ti3Au2C2 and Ti3IrC2 phases able to form Ohmic contacts with SiC stable at high temperatures under ambient air conditions.
128 citations
TL;DR: The photocatalytic reduction of dinitrogen to ammonia is influenced by the nature and amount of metal loading on TiO2 and the optimum metal content varies depending on the nature of the metal as mentioned in this paper.
Abstract: The photocatalytic reduction of dinitrogen to ammonia is influenced by the nature and amount of metal loading on TiO2. The optimum metal content varies depending on the nature of the metal. A correlation between the ammonia yield and the intermediary MH bond strength is established (low bond strength gives rise to low ammonia yield).
128 citations
TL;DR: An efficient strategy to construct noble metal/2D MOF heterostructures, featuring the utilization of surface oxygen sites from uncoordinated MOF ligands is reported, expected to provide new insights into furnishing MOFs with extended functionalities and applications.
Abstract: Rational hybridization of two-dimensional (2D) nanomaterials with extrinsic species has shown great promise for a wide range of applications. To date, rational design and engineering of heterostructures based on 2D metal-organic frameworks (MOFs) has been rather limited. Herein, we report an efficient strategy to construct noble metal/2D MOF heterostructures, featuring the utilization of surface oxygen sites from uncoordinated MOF ligands. The incorporation of highly dispersed noble metal nanoparticles (e.g., Pt and Pd) with modulated electronic structure is enabled on a surfactant-free MOF surface. As a proof-of-concept demonstration, the 2D Ni-MOF@Pt hybrid with well-defined interfaces is applied to boost the electrochemical hydrogen evolution reaction (HER) and delivers decent electrocatalytic activity under both acidic and alkaline conditions. The present results are expected to provide new insights into furnishing MOFs with extended functionalities and applications.
128 citations
TL;DR: In this paper, a 7%CuO/Ce0.7Mn0.3O2 catalyst was used for the removal of benzene in low concentrations at low temperature.
Abstract: Ce1−xMnxO2 (x = 0.1–0.6) mixed oxides were used as supports for preparing 7%CuO/Ce1−xMnxO2 catalysts by impregnation, for use in the total oxidation of benzene. At x = 0.1 and 0.2, most of manganese was fixed in the fluorite structure of CeO2 to form a solid solution. When x exceeds 0.3, some of the manganese appeared as well dispersed MnOx. The redox interaction between CuO and Ce0.7Mn0.3O2 facilitated the activation of surface oxygen for the oxidation of benzene. The defective sites of oxygen on the dispersed MnOx also enhanced the adsorption and oxidation of benzene. 7%CuO/Ce0.7Mn0.3O2 catalyst was a good candidate for replacing noble metal catalysts for the removal of benzene in low concentrations at low temperature.
128 citations
TL;DR: In this paper, the authors investigated the hydrogenation reaction of 9-ethyl carbazole in the molten form over a wide variety of noble metal and nickel supported catalysts, and the theoretical capacity of hydrogen uptake was obtained and the rate of the reaction and activation energy were estimated.
127 citations