A novel core–shell Pd(0)@enSiO₂–Ni–TiO₂ nanocomposite with a synergistic effect for efficient hydrogenations

Abstract

Bimetallic core-shell nano-structured catalysis, has sparked great attention due to their multiple possibility of morphology, atomic arrangement and composition. In the present study, three bimetallic core-shell based nanocatalysts viz. Pd(0)@enSiO2-TiO2-Ni,...

Magnetically modified Schiff base‐Pd complex: An efficient heterogeneous catalyst for Suzuki–Miyaura cross‐coupling and dyes degradation reaction

“…The high‐resolution XPS spectrum of fresh catalyst of Pd 3d shows two peaks at a binding energy of 334.94 eV (3d5/2) and 340.19 eV (3d3/2) suggesting the existence of palladium in a zero oxidation state. [ 52 ] The recovered catalyst XPS spectrum also shows peaks at 335.0 eV (3d5/2) and 340.30 eV (3d3/2), similar to fresh catalyst (Figure 9).…”

An efficient and sustainable Pd‐nanomagnetic heterogeneous catalyst for the reduction of nitroarene and environmental pollutant

“…Two peaks at 340.19 and 334.94 eV are seen in the XPS data of a fresh catalyst, indicating that palladium is in a state of zero oxidation. 12 The catalyst that has been recycled has almost the same binding energy.…”

“…[6][7][8] There are numerous supports that may be utilized as substrates, including dendrimers, polymers, zeolite, MCM-41, SBA-15, graphene oxide, chitosan, carbon nanotubes, magnetic nanoparticles, and others. [9][10][11][12][13][14][15][16][17][18] Iron oxide magnetic nanoparticles have shown great potential as a supporting material for metal catalysts. [19][20][21][22][23][24][25][26][27][28] The favorable surface area to volume ratio in these materials results in a high concentration of active sites that greatly enhances catalytical efficiency.…”

“…35,37 The existing viable approaches often need high temperatures and pressure and long response times, which are not economical. 12,38 Therefore, it is crucial to create a highly effective catalyst that can react under typical pressure, temperature, and reaction time to increase industrial productivity and reduce environmental impact. [39][40][41][42][43][44] At present, researchers have developed a range of nanocatalysts utilizing noble metals to reduce nitro compounds, such as Pd, Pt, Au, and Ru.…”

“…As a solution to this problem, homogenous catalysts can be grafted onto the surface of organic or inorganic substrates as they contain free amino or hydroxy groups 6–8 . There are numerous supports that may be utilized as substrates, including dendrimers, polymers, zeolite, MCM‐41, SBA‐15, graphene oxide, chitosan, carbon nanotubes, magnetic nanoparticles, and others 9–18 . Iron oxide magnetic nanoparticles have shown great potential as a supporting material for metal catalysts 19–28 .…”