Interface engineering on Janus Pd–Au heterojunction co-catalysts for selective photocatalytic reduction of CO₂ to CH₄

Abstract

Interfacial reaction on Janus metal heterojunction co-catalysts is found to promote their activity and selectivity for photocatalytic conversion of CO2 to CH4.

Integration of Plasmonic Metal and Cocatalyst: An Efficient Strategy for Boosting the Visible and Broad‐Spectrum Photocatalytic H2 Evolution

“…In the third step, integration of Au nanospheres with Pd nanocubes on TiO 2 nanosheets is manipulated via the epitaxial growth of Au on Pd with ethanol as reductant (Figure S3, Supporting Information) . As shown in the TEM image (Figure e; Figures S5c, S6, Supporting Information), spheric Au nanocrystals are selectively deposited on one or more faces of Pd nanocubes to form Janus heterojunctions.…”

“…As reference samples to Au/Pd–TiO 2 , other ternary nanostructures consisted of monocrystalline TiO 2 nanosheets, Pd nanocubes, and Au nanospheres are also fabricated, including Au–TiO 2 –Pd, Pd@Au–TiO 2 , and Au@Pd–TiO 2 (Figure S3, Supporting Information) . In the Au–TiO 2 –Pd, Pd nanocubes and Au nanospheres are separately loaded on TiO 2 nanosheets without the formation of Pd–Au interface (Figure g; Figure S5d, Supporting Information).…”

“…Synthesis of Au/Pd‐TiO 2 : Au/Pd–TiO 2 was synthesized according to our previous report . In brief, 20 mg of TiO 2 –Pd (containing 1.25 mg of Pd, synthetic method in Supporting Information) was dissolved in a mixed solution of 40 mL of H 2 O/ethanol mixture (1: 1 volume ratio).…”

Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

“…These binding energy values were the characteristic peaks of metallic Au 0 4f 7/2 and Au 0 4f 5/2 , respectively. 74,75 The XPS spectrum of Pd 3d for Au(2)Pd(1)/MIL-101(Cr) catalyst exhibited two intense binding energy peaks at 341.2 eV and 335.9 eV, corresponding to the metallic palladium 3d 3/2 and 3d 5/ 2 , respectively (Fig. 3b).…”

“…In recently published papers, the binding energy of Au 0 4f 5/2 and Au 0 4f 7/2 were 87.3 eV-87.8 eV and 83.6 eV-84.5 eV. 74,75 Binding energy peaks of Pd 3d 5/2 and 3d 3/2 at 335.6 eV and 340.4 eV were assigned to metallic palladium (Pd 0 ). 76,77 For the bimetallic Au(2)Pd(1)/MIL-101(Cr) catalyst, two obvious peaks were obtained in the Au 4f spectra at the binding energy of 83.8 eV and 87.7 eV, respectively (Fig.…”