Synergistic photo-enhanced electrocatalysis of Pt–ZnO–Bi₂O₃ heterojunction for methanol oxidation under visible light illumination

Abstract

Pt-based Bismuth oxide (Bi2O3), Zinc oxide (ZnO), and Bi2O3-ZnO heterojunctions are synthesized and tested in the photo-electrocatalytic oxidation of methanol in alkali under visible light irradiation. The decrease band gaps...

Pd Nanoparticle-Decorated Novel Ternary Bi2O2CO3-Bi2MoO6-CuO Heterojunction for Enhanced Photo-electrocatalytic Ethanol Oxidation

“…Here, the standard redox potential data of Pd 2+/ Pd (0.915 V) and Cu 2+ /Cu (0.34 V) reveal the reduction of Pd 2+ and oxidation of Cu. The details of the Pd doping process on metal oxides or other metal are clearly explained in our previous studies and the literature. ,,, …”

“…Again, these electrodes on light exposure further decreased the diameter of the arc. This result indicates that light irradiation made a marked improvement in interfacial charge transport and enhancement of e − −h + separation 14,16,83 in the n−n and n−p junction of the quaternary composite. The role of Bi 2 MoO 6 -Bi 2 O 2 CO 3 in photo-electrocatalytic ethanol oxidation is the enhanced separation and transfer of photogenerated electron−hole pairs.…”

“…Then, the triggered solutions were tested for FTIR and high-performance liquid chromatography (HPLC) (Shimadzu Corporation, Japan) similar to the previous study. 11,16 ■ ASSOCIATED CONTENT * sı Supporting Information…”

“…The light intensity was measured using a lux meter (LX-101A). The experimental framework of the photo-electrooxidation system was depicted in our earlier study. ,, …”

“…The details of the Pd doping process on metal oxides or other metal are clearly explained in our previous studies and the literature. 2,4,10,16 The morphologies of the as-prepared powder samples of Pd-Bi 2 MoO 6 -Bi 2 O 2 CO 3 (Pd/BM-BOC) , and Pd-Bi 2 MoO 6 -Bi 2 O 2 CO 3 -CuO (Pd/BM-BOCC) nanocatalysts were observed by FESEM (Figure 3a−c). In Figure 3a, a hierarchical morphology with a relatively smooth and flat surface and small spherical particles were found on the surface of Bi 2 MoO 6 -Bi 2 O 2 CO 3 in the Pd-BM-BOC catalyst, which may be due to the deposition of metallic Pd.…”