Identifying the functions of nickel in the attenuation of H2S emissions from three-way automotive catalysts

Ni-based bimetallic heterogeneous catalysts for energy and environmental applications

“…[323][324][325] Additionally, Ni can also act as a sulfur scavenger due to its high activity in H 2 S removal. 326 Bimetallic Ni-Pd catalysts have been explored in CO oxidation and have a higher activity than monometallic Pd catalysts. [327][328][329] Ni-Pd nanoalloy catalysts exhibit remarkable tunability in terms of phase state, bimetallic composition, and atomic-scale structure, which are responsible for the origin of the structural synergy for the CO oxidation reaction.…”

Sulfur adsorption and release properties of bimetallic Pd–Ni supported catalysts

“…A Ni scavenger has been commonly added to the TWC by the physical mixing of NiO with the TWC [23,25]. The disadvantage of such a preparation method can be a weak contact between Ni and the support.…”

“…For this reason, the addition of a second metal, capable of binding sulfur, to the TWC has been considered [22]. It has been concluded that the presence of NiO in the TWC prevents both catalyst poisoning and formation of H 2 S [5,[23][24][25].…”

Preparation and characterization of Pd–Ni bimetallic catalysts for CO and C3H6 oxidation under stoichiometric conditions

“…Ni has been widely employed as a sulfur scavenger in TWC due to its high activity in H 2 S removal [32,33]. A possible concern in Ni addition to the TWC system may arise due to potential danger of Ni-carbonyl formation.…”