High-performance high-entropy quinary-alloys as anode catalysts for direct ethylene glycol fuel cells

Cheng, Yangshuai (author)

Sun, Yan (author)

Deng, Ximing (author)

Zhang, Miao (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Zhang, Linwei (author)

Wang, Wei (author)

(creator_code:org_t)

Elsevier BV, 2023
2023
English.
In: International journal of hydrogen energy. - : Elsevier BV. - 0360-3199 .- 1879-3487. ; 48:22, s. 8156-8164

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

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−1PtPdAu, which is 2.18 times of Pt/C (0.221 A mg−1Pt) 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.

By the author/editor: Cheng, Yangshuai; Sun, Yan; Deng, Ximing; Zhang, Miao; Zhang, Linwei; Wang, Wei

About the subject

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