Tuning the interfaces in the ruthenium-nickel/carbon nanocatalysts for enhancing catalytic hydrogenation performance

Ru and Ni—Privileged Metal Combination for Environmental Nanocatalysis

“…The Ru-Ni-NiO structures were reduced to metallic Ru (and to a lesser extent to metallic Ni), which then produced the so-called hydrogen spillover [85,[112][113][114][115][116][117][118][119], and as a result, there is a synergic formation of Ru, Ni and NiO active sites. In turn, a similar synergy was not observed for the RuO 2 -NiO structures [86].…”

“…synergic formation of Ru, Ni and NiO active sites. In turn, a similar synergy was not observed for the RuO2-NiO structures [86].…”

“…In Table 2, we have compiled the examples of preparation and application of Ru/Ni systems. wet impregnation, calcination dry reforming of methane [83] 15 wt.% Ni-0.5 wt.% Ru/MgO/Al 2 O 3 wet impregnation, calcination dry reforming of methane [84] 14 wt.% Ni-1 wt.% Ru/CeO 2 -Al 2 O 3 co-precipitation, wet impregnation, calcination hydrogen production via steam reforming of simulated bio-oil [10] 10 wt.% Ni-1 wt.% Ru/C incipient-wetness impregnation, calcination hydrogenolysis of lignin [11] Ni-Ru (various loading)/C chemical reduction, galvanic replacement, calcination catalic hydrogenation [85,86] 1 wt.% Ni-0.3 wt.% Ru/ZnSe: CGSe flux-assisted method, precipitation photocatalytic hydrogen evolution [87]…”

Transalkylation of C10 Aromatics with 2-Methylnaphthalene for 2,6-Dimethylnaphthalene Synthesis over a Shape-Selective SiO2–Ni–H-Mordenite with Nanosheet Crystal

“…Concretely, hydrogen molecules are adsorbed to the active surface of metal Ni nanoclusters and are dissociated into hydrogen atoms. The latter spill over , and migrate onto the surface of acidic HMOR and subsequently are converted into active hydrogen species (H + and H – ) through their interaction with acid sites (especially Lewis acid sites) there. − Then carbocation reaction and the recovery of surface protonic acid sites may be effectively accelerated due to the involvement of the above these formed active hydrogen species. − This means a greatly enhanced proton-transfer efficiency in the surface catalytic system over Ni–HMOR, and this significantly improved the reactivity of transalkylation catalyzed primarily by Brønsted acid sites. ,, It is also proved by the results of transalkylation over HMOR or 3.0%Ni–HMOR under different reaction atmospheres (N 2 or H 2 ). As shown in Figure , compared with the 2,6-DMN yield (at the initial reaction stage) for the two catalysts under a N 2 atmosphere or that for the HMOR under a H 2 atmosphere, a much higher yield was obtained over 3.0%Ni–HMOR under a H 2 atmosphere.…”

Atomic‐Scale Interface Engineering: Boosting Oxygen Electroreduction over Supported Ternary Alloys Fabricated by Carbon‐Assisted Galvanic Replacement

“…For the possible formation mechanism of alloys fabricated by the galvanic replacement, Liu and co-workers [17] fabricated PtCu alloys via galvanic replacement between copper nanowires as sacrificial templates in aqueous solutions containing H 2 PtCl 6 at room temperature, and they claimed that there is a disproportionation reaction during the replacement reaction, 2Cu + → Cu 2+ + Cu, and then the Cu 2+ enters into solution and the Cu will be alloyed with Pt reduced by Cu nanowires to form an PtCu alloy. Moreover, Zhu group [18] fabricated a series of Ru-Ni/C samples with different interfaces via galvanic replacement, proving that the supported catalyst can be prepared by the galvanic replacement method. Therefore, it is noted that galvanic replacement reaction can not only synthesize alloys with various morphologies but also contribute to advance the supported alloy catalysts.…”