Wang, Y., Gong, N., Liu, H., Ma, W., Hippalgaonkar, K., Liu, Z., & Huang, Y. (2023). Ordering‐Dependent Hydrogen Evolution and Oxygen Reduction Electrocatalysis of High‐Entropy Intermetallic Pt4FeCoCuNi. Advanced Materials, 35(28). Portico. https://doi.org/10.1002/adma.202302067
Abstract:
AbstractDisordered solid‐solution high‐entropy alloys have attracted wide research attention as robust electrocatalysts. In comparison, ordered high‐entropy intermetallics have been hardly explored and the effects of the degree of chemical ordering on catalytic activity remain unknown. In this study, a series of multicomponent intermetallic Pt4FeCoCuNi nanoparticles with tunable ordering degrees is fabricated. The transformation mechanism of the multicomponent nanoparticles from disordered structure into ordered structure is revealed at the single‐particle level, and it agrees with macroscopic analysis by selected‐area electron diffraction and X‐ray diffraction. The electrocatalytic performance of Pt4FeCoCuNi nanoparticles correlates well with their crystal structure and electronic structure. It is found that increasing the degree of ordering promotes electrocatalytic performance. The highly ordered Pt4FeCoCuNi achieves the highest mass activities toward both acidic oxygen reduction reaction (ORR) and alkaline hydrogen evolution reaction (HER) which are 18.9‐fold and 5.6‐fold higher than those of commercial Pt/C, respectively. The experiment also shows that this catalyst demonstrates better long‐term stability than both partially ordered and disordered Pt4FeCoCuNi as well as Pt/C when subject to both HER and ORR. This ordering‐dependent structure–property relationship provides insight into the rational design of catalysts and stimulates the exploration of many other multicomponent intermetallic alloys.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - Accelerated Materials Development for Manufacturing Program
Grant Reference no. : A1898b0043
This research / project is supported by the Ministry of Education - Tier 1
Grant Reference no. : FG79/20
This research / project is supported by the National Research Foundation - NRF Fellowship
Grant Reference no. : NRFNRFF13-2021-0011
Description:
This is the peer reviewed version of the following article: Wang, Y., Gong, N., Liu, H., Ma, W., Hippalgaonkar, K., Liu, Z., & Huang, Y. (2023). Ordering‐Dependent Hydrogen Evolution and Oxygen Reduction Electrocatalysis of High‐Entropy Intermetallic Pt4FeCoCuNi. Advanced Materials, 35(28). Portico. https://doi.org/10.1002/adma.202302067, which has been published in final form at doi.org/10.1002/adma.202302067. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.