Synthesis of a Small Amorphous PdMo/C Nanocatalyst and Pd Nanocubes Enclosed within (100) Planes and Their Use for Ethylene Glycol Electro–oxidation. Issue 3 (8th February 2017)

• Record Type: Journal Article
• Authors: Ambriz‐Peláez, Oscar; Álvarez‐Contreras, Lorena; Guerra‐Balcázar, Minerva; Ledesma‐García, Janet; Arriaga, Luis Gerardo; Arjona, Noé
• Is Part Of: ChemElectroChem. Volume 4:Issue 3(2017)
• Page Start: 728
• Page End: 737
• Publication Date: 2017-02-08
• Subjects: Electron diffraction -- Electrochemistry -- Energy conversion -- nanoparticles -- Palladium; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201600856
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: In this work, PdMo/C and Pd/C nanocubes were synthesized and used for the electro‐oxidation of ethylene glycol. The XRD patterns revealed that the Pd/C nanocubes had an average crystallite size of 10.9 nm, whereas the PdMo/C nanoparticles were amorphous. HRTEM images indicated the presence of only cubic‐shaped nanoparticles for Pd/C nanocubes and semispherical nanoparticles for PdMo/C with sizes of 9 and 2 nm, respectively. XPS and line‐scan EDX spectroscopy confirmed the presence of Pd and Mo in the PdMo/C nanocatalyst, and Mo was determined to be incorporated with Pd in the form MoO3 . The Pd/C nanocubes exhibited a current density that was 9.3 times higher than commercial Pd/C, demonstrating the superior activity of the (100) facet. The combined effects of the amorphous structure and the presence of molybdenum oxides enhanced the activity of PdMo/C, which demonstrated a 1.5‐fold increase current density with respect to the Pd/C nanocubes and a 12‐fold increase compared to commercial Pd/C. Abstract : Jump on a plane : A novel and highly active amorphous PdMo/C nanocatalyst together with well‐defined Pd nanocubes enclosed within (100) planes are synthesized and used as nanocatalysts for ethylene glycol oxidation, showing 12 and 9‐fold increases in the current density compared to commercial Pd/C. The activity of this reaction in alkaline medium is crystallinity dependent, following the trend: amorphous>(100)>(111) planes.