Ultrahigh Active Pd Nanocatalyst Supported on Core-Sheath Conducting Polymer/Metal Oxide Composite Nanorods

Abstract

A facile and aqueous-phase method based on the electron transfer reduction process for fabricating coresheath structured polyaniline (PANI)/SnO 2 composite nanorods supported Pd nanocatalyst has been demonstrated. The Pd nanoparticles synthesized by this strategy have a small size of smaller than 3.0 nm. The well dispersed Pd nanoparticles with small sizes supported on coresheath PANI/SnO 2 composite nanorods exhibited an ultrahigh catalytic activity during the catalytic reduction of p-nitrophenol into p-aminophenol by NaBH 4 in aqueous solution. The kinetic apparent rate constant (k app ) reach to be about 26.9 9 10 -3 s -1 . It is believed that this method could be extended to cover many kinds of other functional composite nanomaterials where the active component is expected to bring in new features and applications.

Rapid, Microwave‐Assisted, and One‐Pot Synthesis of Magnetic Palladium–CoFe2O4–Graphene Composite Nanosheets and Their Applications as Recyclable Catalysts

“…In addition to the Fe and Co, the Pd3d peaks at 335.7 and 340.9 eV appeared. These two peaks are assigned to the Pd3d5/2 and Pd3d3/2 of Pd(0), respectively . These results further confirmed that we have successfully prepared Pd and CoFe 2 O 4 nanoparticles supported on the surface of GE nanosheets.…”

“…However, the small noble metal nanoparticles are easily aggregated during the catalytic or electrocatalytic reactions due to their high surface energy, which could remarkably reduce their initial catalytic activity and selectivity . Therefore, the noble metal nanoparticles are usually immobilized on the surface of some less expensive solid supports to enhance their stability . Carbon materials including activated carbon, carbon nanotubes, and carbon nanofibers are regarded as promising supporting materials of noble metal nanoparticles for catalytic and electrocatalytic applications due to their large surface area and chemical stability .…”

High performance Pd nanocrystals supported on SnO2-decorated graphene for aromatic nitro compound reduction

“…5c shows the relationship between ln(A t /A 0 ) (corresponding to ln(C t /C 0 )) and C t /C 0 versus the reaction time t, in which A t and A 0 correspond to the absorbance values at specic time intervals and the initial time, respectively. The curve of ln(C t /C 0 ) as function of t is found to be linear with a calculated kinetic constant k app 2.03 Â 10 À2 s À1 , which was much higher than most of the other building blocks for previously reported supported Pd nanocatalysts 22,23,25,[33][34][35][36] (see Table 1).…”

“…Furthermore, it was found that the as-prepared PdNCs/SnO 2 -GNS nanohybrid exhibited highly efficient activity as catalyst for reduction of 4-NP to 4-AP by NaBH 4 . In addition, other previously reported Pd-based catalysts 22,23,25,[33][34][35][36] have also been compared with our PdNC/SnO 2 -GNS hybrid. The results show distinctly that the as-synthesized PdNC/SnO 2 -GNS exhibit a preferable catalytic efficiency.…”

Synthesis, characterization, and properties of new conducting polyaniline/copper sulfide nanocomposites

“…Metal nanoparticles with different sizes and shapes can be mixed with conducting polymer to form composite materials, which represent a new class of materials that may combine desirable physical characteristics of both organic and metallic component with single composition. The metallic portion offers the electrical properties, whereas the polymer part can provide thermal stability and mechanical properties to the fabricated polymer [8,[16][17][18][19][20][21][22]. Fabrication of polyaniline (PANI) composite with various materials has received great attention because of their unique properties and applications in various electrical devices [23].…”