Mesoporous Mo-doped PtBi Intermetallic Metallene Superstructures to Enable the Complete Electrooxidation of Ethylene Glycol

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2024 Mar 22

PMID 38516075

Authors

Xiaotong Yang

Qiang Yuan

Tian Sheng

Xun Wang

Affiliations

Soon will be listed here.

Abstract

Metallenes, intermetallic compounds, and porous nanocrystals are the three types of most promising advanced nanomaterials for practical fuel cell devices, but how to integrate the three structural features into a single nanocrystal remains a huge challenge. Herein, we report an efficient one-step method to construct freestanding mesoporous Mo-doped PtBi intermetallic metallene superstructures (denoted M-PtBiMo IMSs) as highly active and stable ethylene glycol oxidation reaction (EGOR) catalysts. The materials retained their catalytic performance, even in complex direct ethylene glycol fuel cells (DEGFCs). The M-PtBiMo IMSs showed EGOR mass and specific activities of 24.0 A mg and 61.1 mA cm, respectively, which were both dramatically higher than those of benchmark Pt black and Pt/C. infrared spectra showed that ethylene glycol underwent complete oxidation a 10-electron CO-free pathway over the M-PtBiMo IMSs. Impressively, M-PtBiMo IMSs demonstrated a much higher power density (173.6 mW cm) and stability than Pt/C in DEGFCs. Density functional theory calculations revealed that oxophilic Mo species promoted the EGOR kinetics. This work provides new possibilities for designing advanced Pt-based nanomaterials to improve DEGFC performance.

Citing Articles

Accelerated Selective Electrooxidation of Ethylene Glycol and Inhibition of C-C Dissociation Facilitated by Surficial Oxidation on Hollowed PtAg Nanostructures via In Situ Dynamic Evolution.

Li Y, Liao Q, Ji P, Jie S, Wu C, Tong K JACS Au. 2025; 5(2):714-726.

PMID: 40017736 PMC: 11862955. DOI: 10.1021/jacsau.4c00975.

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