Cerium phosphate in automotive exhaust catalyst poisoning

Experimental simulation of chemical reactions between ZDDP tribofilms and steel surfaces during friction processes

“…It can be noticed that practically no iron is found inside the transfer film (mainly zinc phosphate) which is very different from experiment 1. According to the literature [3][4][5][6][7][8][9][10][11][12][13][14], the top layer of the tribofilm generated on the flat sample contains more zinc than iron. This can explain the large amount of zinc in the transfer film.…”

“…Because of environmental requirements, the amount of sulfur and phosphorus in engine lubricants has to be drastically reduced in the near future: those two elements are found in exhaust gas (because of oil consumption) and poison catalysts [7,8]. ZDDP additives, which contain both elements, are directly concerned by these considerations.…”

LaPO4:Eu3+, LaPO4:Ce3+, and LaPO4:Ce3+,Tb3+ nanocrystals: Oleic acid assisted solvothermal synthesis, characterization, and luminescent properties

“…Recently, a particular emphasis has been placed on the study of rare earth (RE) ions doped compounds due to their large variety of applications [10][11][12][13][14][15][16][17][18]. This is mainly based on their particular 4f-5d and 4f-4f electronic transition which can yield intense and narrow emission bands and thus generate individual colors in multi-phosphor devices [19][20][21][22][23]. However, the applications of RE-doped materials are still highly dependent on some basic factors such as size and morphology, which may govern their luminescence.…”

Nickel phosphide catalyst for autothermal reforming of surrogate gasoline fuel

“…In contrast to the NiP/ Ce catalyst, none of Ce 3þ species is present in the used Ni/ Ce catalyst recovered from ATR under the same condition according to its Ce XPS 3d spectrum. Xu and coworkers 30 reported that CePO 4 is formed in the automotive exhaust catalyst through the reaction of ceria with gaseous H 3 PO 4 and Figure 10. TPO profiles of NiP/Ce and Ni/Ce after 8-h ATR of n-octane.…”