Alumina-supported Cu@Ni and Ni@Cu core–shell nanoparticles: Synthesis, characterization, and catalytic activity in water–gas-shift reaction

Mono and bimetallic Cu-Ni structured catalysts for the water gas shift reaction

“…Nevertheless the difference of the CO oxidation activity for the both samples should be taken into consideration the lower CO conversion of the Cu-Ni:1-2/AC could induce also lower CH 4 formation and masques an Cu loading influence on the methanation reaction. Besides, very interestingly, Cu-Ni:2-1/AC catalyst showed similar activity in methanation, like the reported for Cu-Ni/CeO 2 [26] under A c c e p t e d M a n u s c r i p t similar reaction conditions, suggesting that the observed effect should be attributed only to the metallic phase.…”

“…Cu, Ni and Cu-Ni supported on activated carbon has been used in methanol [21], dimethyl carbonate [22], and diethyl carbonate synthesis [23] and in principle are also suitable for the WGS reaction [24]. Nowadays, Cu and Ni metals supported on SiO 2 [25], Al 2 O 3 [26], CeO 2 [27] and ZrO 2 [28], have been widely employed as heterogeneous catalysts for the water gas shift reaction. However, these catalysts have relatively low surface area and they are also deactivated under start/stop cycles.…”

Promotion of the Water‐Gas‐Shift Reaction by Nickel Hydroxyl Species in Partially Reduced Nickel‐Containing Phyllosilicate Catalysts

“…[6][7][8] To circumvent the methanation reaction, numerous methods have been studied, such as the incorporation of alkali metals, [9][10][11][12][13][14] formation of alloys with as econdary metal, [5,[15][16][17][18][19] addition of noble metals [18,19] and tuning the structural configuration. [20][21][22][23] Saw et al reported that Ni-Cu alloy could enhance the adsorption of CO on the metals, which can prevent CO dis-sociation. [5] Watanabee tal.…”

“…[18] New designs of the catalyst structure have also improvedthe catalytic property of Ni catalysts. Linand Guliants [20] developed an ovel alumina-supportedC u@Ni and Ni@Cu coreshell catalysta nd found that Cu preferentially segregated on the outer surface and preventedt he CO dissociation and methanation on the Ni surface. In addition, hydroxyl groups (À OH), which are produced by the water dissociation, can also determine the reactivity by changingt he CO adsorption behavior.…”

Catalytic activity of TM@Cu12 core–shell nanoclusters for water gas shift reaction

“…Sawa et al unveiled that CuNi alloy, owing to its high CO conversion, are currently garnering great attention for use in WGS reaction especially for high temperature [15]. Moreover, Cu@Ni and Ni@Cu coreeshell nanoparticles have been synthesized by Lin et al [16] and proved to have prior catalytic activity in WGSR. Knudsen et al report CuPt nearsurface alloy is a promising candidate for an improved WGSR catalyst [17].…”