Promotional effect and mechanism of Ce-modified VO-WO/TiO catalyst in low-temperature NH-SCR.

The enhancement effect of Ce modification on VO-WO/TiO catalysts at low temperatures was investigated for the selective catalytic reduction (SCR) of NO with NH (NH-SCR). By adding 9% CeO to 0.5%VO-3%WO/TiO catalyst, the low-temperature denitrification performance of CeVWTi catalyst after Ce modification was significantly improved, achieving a NO conversion above 90% within a broad temperature range of 200-350℃, with catalytic activity comparable to that of 3% VO-3% WO/TiO.

Anomalous Hall effect in Nd-doped BiSbSTe topological insulator single crystals.

Topological insulators are emerging materials with insulating bulk and symmetry protected nontrivial surface states. One of the most fascinating transport behaviors in a topological insulator is the quantum anomalous Hall effect, which has been observed in magnetic-topological-insulator-based devices. In this work, we report successful doping of rare-earth element Nd into BiSbSTe bulk-insulating topological insulator single crystals, in which the Nd moments are ferromagnetically ordered at ∼100 K.