Journal•ISSN: 1011-372X
Catalysis Letters
Springer Science+Business Media
About: Catalysis Letters is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Catalysis & Heterogeneous catalysis. It has an ISSN identifier of 1011-372X. Over the lifetime, 9793 publications have been published receiving 250170 citations.
Topics: Catalysis, Heterogeneous catalysis, Adsorption, Chemistry, Zeolite
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TL;DR: In this paper, a modified ZSM-5 zeolite catalysts with a fixed bed continuous-flow reactor and with a temperature programmed reactor were used for the de-hydrogenation and aromatization of methane.
Abstract: The dehydrogenation and aromatization of methane on modified ZSM-5 zeolite catalysts has been studied under non-oxidizing conditions with a fixed bed continuous-flow reactor and with a temperature programmed reactor. The results show that benzene is the only hydrocarbon product of the catalytic conversion of methane at high temperature (973 K). The catalytic activity of ZSM-5 is greatly improved by incorporating a metal cation (Mo or Zn). H2 and ethene have been directly detected in the products with a mass spectrometer during TPAR. A carbenium ion mechanism for the activation of methane is suggested.
738 citations
TL;DR: In this article, a 2.3 eV band gap was used for O2 evolution from aqueous solutions containing Ag+ as an electron scavenger under visible light irradiation (λ > 520 nm), and the quantum yield was 0.5% at 450 nm.
Abstract: BiVO4 with a 2.3 eV band gap showed an activity for O2 evolution from aqueous solutions containing Ag+ as an electron scavenger under visible light irradiation (λ > 520 nm). The quantum yield was 0.5% at 450 nm.
639 citations
TL;DR: In this paper, self-consistent density functional calculations for the adsorption of O and CO on flat and stepped Au(111) surfaces are used to investigate effects which may increase the reactivity of Au.
Abstract: Self‐consistent density functional calculations for the adsorption of O and CO on flat and stepped Au(111) surfaces are used to investigate effects which may increase the reactivity of Au. We find that the adsorption energy does not depend on the number of Au layers if there are more than two layers. Steps are found to bind considerably stronger than the (111) terraces, and an expansive strain has the same effect. On this basis we suggest that the unusually large catalytic activity of highly‐dispersed Au particles may in part be due to high step densities on the small particles and/or strain effects due to the mismatch at the Au–support interface.
612 citations
TL;DR: In this paper, the mechanisms for storing NOx in platinum-barium-alumina catalysts during lean-rich transients are investigated, and NO2 is found to be important for oxidation of the catalyst or of nitrites to form nitrates.
Abstract: The mechanisms for storing of NOx in platinum-barium-alumina catalysts during lean-rich transients are investigated. Oxidation of NO to NO2 is found to be an important step. NO2 is found to be important for oxidation of the catalyst or of nitrites to form nitrates. NOx is then stored in the form of surface nitrates. FTIR studies show no formation of bulk nitrates in these experiments.
598 citations
TL;DR: The influence of the preparation methods on the catalytic activity for CO oxidation was markedly large for Au-TiO2 and negligible for Pt- TiO2 catalysts as discussed by the authors, and the most active catalysts for both Pt and Au were prepared by deposition-precipitation (DP), photodeposition (FD), and impregnation (IMP).
Abstract: The influence of the preparation methods on the catalytic activity for CO oxidation was markedly large for Au-TiO2 and negligible for Pt-TiO2 catalysts. Platinum and gold were deposited on TiO2 by deposition-precipitation (DP), photodeposition (FD) and impregnation (IMP). The DP method gave the most active catalysts for both Pt and Au. Gold catalysts prepared by DP were active at temperatures below 273 K and showed a much greater activity than Pt catalysts.
561 citations