Mechanism of NH-SCR over P/CeO Catalysts Investigated by Spectroscopies.

This study reports a comprehensive investigation into the active sites and reaction mechanism for the selective catalytic reduction of NO by NH (NH-SCR) over phosphate-loaded ceria (P/CeO). Catalyst characterization and density functional theory calculations reveal that HPO and HPO species are the dominant phosphate species on the P/CeO catalysts under the experimental conditions. The reduction/oxidation half-cycles (RHC/OHC) were investigated using X-ray absorption near-edge structure for Ce L-edge, ultraviolet-visible, and infrared (IR) spectroscopies together with online analysis of outlet products ( spectroscopy).

Bulk tungsten-substituted vanadium oxide for low-temperature NOx removal in the presence of water.

NH-SCR (selective catalytic reduction) is important process for removal of NOx. However, water vapor included in exhaust gases critically inhibits the reaction in a low temperature range. Here, we report bulk W-substituted vanadium oxide catalysts for NH-SCR at a low temperature (100-150 °C) and in the presence of water (~20 vol%).

Simultaneous Determination of Manganese Peroxidase and Lignin Peroxidase by Capillary Electrophoresis Enzyme Assays.

Here, we developed an enzyme assay of manganese peroxidase (MnP) by capillary electrophoresis using an in-capillary reaction and applied it to a simultaneous assay of MnP and lignin peroxidase (LiP). The enzyme activity of MnP was determined from the peak area corresponding to Mn(III)-malonate produced by the plug-plug reaction between MnP and Mn(II) in a separation capillary. A background electrolyte containing 250 mM malonate buffer (pH 4.