High-performance high-entropy quinary-alloys as anode catalysts for direct ethylene glycol fuel cells. (12th March 2023)

• Record Type: Journal Article
• Authors: Cheng, Yangshuai; Sun, Yan; Deng, Ximing; Zhang, Miao; Zhang, Linwei; Wang, Wei
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 22(2023)
• Page Start: 8156
• Page End: 8164
• Publication Date: 2023-03-12
• Subjects: High entropy alloy -- Ethylene glycol electro-oxidation -- Fuel cells; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.11.214
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Noble metals are the most commonly used electrocatalysts, but due to the high-cost and scarcity, improving their utilization has become a hot topic. As the Pt-based high-entropy alloy (HEA) can greatly increase the activity of catalyst and increase the utilization of noble metal, herein, a HEA with promising performance in ethylene glycol oxidation reaction (EGOR) is developed. The EGOR results show that, the onset potential of PtPdAuNiCo/C is 0.55 V, which is 20 mV lower than Pt/C (0.57 V) reference. Besides, the PtPdAuNiCo/C exhibits a high activity of 0.482 A mg −1 PtPdAu, which is 2.18 times of Pt/C (0.221 A mg −1 Pt ) reference. And the current retention rate of PtPdAuNiCo/C (81.3%) is also higher than Pt/C (73.0%) reference in 500-cycle stability test. When as-obtained PtPdAuNiCo/C assembled into a direct ethylene glycol fuel cell, it exhibits a high-power density of 8.38 mW cm −2 . It is 1.40 times than that of Pt/C (6.00 mW cm −2 ) reference. This work would be a good reference to HEA materials application on electrocatalysis in future. Graphical abstract: Image 1 Highlights: A Pt-based high-entropy alloy electrocatalyst of PtPdAuNiCo/C is fabricated. As-obtained PtPdAuNiCo/C in EGOR is an irreversible diffusion-controlled process. The PtPdAuNiCo/C has high EGOR activity, stability and CO-poisoning, as well as good power density in assembled DEGFC device.