Copper nanoparticles socketed in situ into copper phyllosilicate nanotubes with enhanced performance for chemoselective hydrogenation of esters

Abstract

Copper nanoparticles exsoluted in situ under a reducing atmosphere at elevated temperatures are socketed into the parent copper phyllosilicate nanotubes and exhibit excellent catalytic performance and superior stability for the selective hydrogenation of various esters to alcohols.

Highly Selective Silica‐supported Copper Catalysts Derived from Copper Phyllosilicates in the Hydrogenation of Adipic Acid to 1,6‐hexanediol

“…The TEM images of CuPSs were also recorded (Figure S4); however, Cu particle could not be identified clearly. Formation of immobilized Cu during the reduction treatment of CuPSs (known as exsolution) is likely to cause the differences of resolutions of Cu particles between CuPSs and reduced CuPSs …”

“…The decreases of (Cu/Si) surf ratios of reduced CuPSs indicated that exsolution of Cu from phyllosilicate structure could be promoted during reduction. Exsoluted Cu formed immobilized Cu particles on the surface, resulting in lower Cu‐to‐Si XPS intensity ratios of reduced CuPSs than those of CuPSs. The schematic diagram of the formation of exsoluted Cu particles through the reduction of CuPS was shown in Figure S5 of the Supporting Information.…”

Hierarchical TiO2 microspheres composed with nanoparticle-decorated nanorods for the enhanced photovoltaic performance in dye-sensitized solar cells

“…Bisquert and Kern proposed the model including diffusion coupled with a homogeneous reaction with a continuity equation (as shown in eqn (S1) †). [56][57][58] In this equivalent circuit model, the equivalent circuit included components of R1 (series resistance), R2 (resistance of Pt counter electrode), CPE1 (double layer capacitance of Pt counter electrode) and DX1 (a complex electronic component composed with r t , r r , and C p as shown in Fig. S1 †).…”

Structural Reversibility of LaCo1‐xCuxO3 Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

“…Such materials play an important role in catalytic processes like water gas shift, partial oxidation and reforming of methane (dry and wet), alkene hydrogenation, alkane hydrogenolysis, higher alcohol synthesis, and Fischer‐Tropsch synthesis . The in situ segregation strategy is also exploited for perovskite‐type oxides central to solid oxide fuel cells (SOFC) and for heterogeneous catalytic application for soot combustion even some homogeneous application for selective hydrogenations . Moreover, application of perovskite‐type oxides in automotive exhaust catalysis has been demonstrated extensively .…”