今井進介君が中心となって行ったRh/NbOPO4触媒によるNO選択還元に関する研究成果がCatalysis Today (Elsevier)にAcceptされました。Our paper reporting selective reduction of NO by Rh/NbOPO4 catalyst was accepted in Catalysis Today (Elsevier).

「Selective catalytic reduction of NO with CO and C₃H₆ over Rh/NbOPO₄」.

Imai, Shinsuke; Miura, Hiroki; Shishido, Tetsuya

Catalysis Today, 2019, 332, 267-271 DOI:10.1016/j.cattod.2018.07.027

The selective catalytic reduction of NO with C₃H₆ and CO was investigated over platinum group metal (PGM; Pd, Rh, or Pt) supported on NbOPO4. Rh/NbOPO4 exhibits a lower light-off temperature of NO reduction to N2 compared to Pd- or Pt-loaded NbOPO4 catalysts and Rh/Al2O3 under stoichiometric conditions. Rh/NbOPO4 shows superior catalytic activity for NO reduction to Rh/Al2O3 under a wide range of lean conditions. Propylene (C₃H₆) was partially oxidized to reactive aldehyde species on Rh/NbOPO4, whereas less-reactive carboxylate species was generated and adsorbed on Rh/Al2O3. A highly dispersed Rh0nanoparticles on NbOPO4 was slowly oxidized by exposure to excess O2, but Rh on Al2O3was readily oxidized to less-active Rh2O3. The high activity of Rh/NbOPO4 for C₃H₆ oxidation to reactive aldehyde species and the resistance of Rh0 against oxidation results in the enhancement of NO reduction activity in a slightly lean region.