Tungsten Carbide Microspheres with High Surface Area as Platinum Catalyst Supports for Enhanced Electrocatalytic Activity

W2013429050 · 수집 2026-10-04 18:12:19

T10030 Electrocatalysts for Energy Conversion

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Tungsten carbide (WC) support is synthesized by the template of amorphous carbon microspheres (CMS), which is prepared by a hydrothermal synthesis process using glucose as the carbon precursor. The WC/CMS support is characterized by XRD, SEM, and BET. Pt nanparticles are loaded on the WC/CMS support and Pt/WC/CMS catalyst is formed. The onset potential of oxygen reduction reaction (ORR) on Pt/WC/CMS is 120 mV higher than that on Pt/C, indicating the superior ORR performance of Pt/WC/CMS. The Pt/WC/CMS catalyst shows higher electrocatalytic activity for ethanol electrooxidation than Pt/C (E-TEK). The higher If/Ib ratio of Pt/WC/CMS indicates better resistance to carbon monoxide poisoning on the Pt/WC/CMS. The rate constant of oxygen reduction reaction for Pt/WC/CMS is twice as high as that of Pt/C, indicating the synergetic effects between the Pt and the WC support. The electrochemical stability of Pt/WC/CMS is higher than that of Pt/C, which can be attributed to the high stability of WC support.

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