Glycerol Electrooxidation over Precision-Synthesized Gold Nanocrystals with Different Surface Facets.
Hansen MouFang LuZechao ZhuangQiaowan ChangLihua ZhangXiaobo ChenYugang ZhangJingguang G ChenPublished in: Precision chemistry (2024)
Electrochemical glycerol oxidation (EGO) emerges as a promising route to valorize glycerol, an underutilized byproduct from biodiesel production, into value-added chemicals. This study employed three types of gold (Au) nanocrystals with controlled shapes to elucidate the facet-dependent electrocatalytic behavior in EGO. Octahedral, rhombic dodecahedral, and cubic Au nanocrystals with {111}, {110}, and {100} facets, respectively, were precisely synthesized with uniform size and shape. Rhombic dodecahedra exhibited the lowest onset potential for EGO due to facile AuOH formation, while octahedra showed enhanced electrochemical activity for glycerol oxidation and resistance to poisoning. In-situ FTIR analysis revealed that Au {111} surfaces selectively favored C 2 products, whereas Au {100} surfaces promoted C 3 product formation, highlighting the significant effect of facet orientation on EGO performance and informing catalyst design.
Keyphrases
- reduced graphene oxide
- gold nanoparticles
- visible light
- room temperature
- sensitive detection
- ionic liquid
- energy transfer
- biofilm formation
- quantum dots
- hydrogen peroxide
- label free
- metal organic framework
- single cell
- silver nanoparticles
- escherichia coli
- high resolution
- risk assessment
- cystic fibrosis
- data analysis
- oxide nanoparticles