article published yes Xiang Wang author Yong Zuo author Sharona Horta author 03a7e858-01b1-11ec-8b71-99ae6c4a05bc Ren He author Linlin Yang author Ahmad Ostovari Moghaddam author Maria Ibáñez author 43C61214-F248-11E8-B48F-1D18A9856A870000-0001-5013-2843 Xueqiang Qi author Andreu Cabot author MaIb department High-entropy materials offer numerous advantages as catalysts, including a flexible composition to tune the catalytic activity and selectivity and a large variety of adsorption/reaction sites for multistep or multiple reactions. Herein, we report on the synthesis, properties, and electrocatalytic performance of an amorphous high-entropy boride based on abundant transition metals, CoFeNiMnZnB. This metal boride provides excellent performance toward the oxygen evolution reaction (OER), including a low overpotential of 261 mV at 10 mA cm–2, a reduced Tafel slope of 56.8 mV dec–1, and very high stability. The outstanding OER performance of CoFeNiMnZnB is attributed to the synergistic interactions between the different metals, the leaching of Zn ions, the generation of oxygen vacancies, and the in situ formation of an amorphous oxyhydroxide at the CoFeNiMnZnB surface during the OER. American Chemical Society2022 eng General Materials Science 1944-8244 1944-8252 36239982 00087378270000110.1021/acsami.2c11627 144248212-48219 Wang, Xiang, Yong Zuo, Sharona Horta, Ren He, Linlin Yang, Ahmad Ostovari Moghaddam, Maria Ibáñez, Xueqiang Qi, and Andreu Cabot. “CoFeNiMnZnB as a High-Entropy Metal Boride to Boost the Oxygen Evolution Reaction.” <i>ACS Applied Materials and Interfaces</i>. American Chemical Society, 2022. <a href="https://doi.org/10.1021/acsami.2c11627">https://doi.org/10.1021/acsami.2c11627</a>. Wang, Xiang, et al. “CoFeNiMnZnB as a High-Entropy Metal Boride to Boost the Oxygen Evolution Reaction.” <i>ACS Applied Materials and Interfaces</i>, vol. 14, no. 42, American Chemical Society, 2022, pp. 48212–19, doi:<a href="https://doi.org/10.1021/acsami.2c11627">10.1021/acsami.2c11627</a>. Wang X, Zuo Y, Horta S, He R, Yang L, Ostovari Moghaddam A, Ibáñez M, Qi X, Cabot A. 2022. CoFeNiMnZnB as a high-entropy metal boride to boost the oxygen evolution reaction. ACS Applied Materials and Interfaces. 14(42), 48212–48219. Wang, X., Zuo, Y., Horta, S., He, R., Yang, L., Ostovari Moghaddam, A., … Cabot, A. (2022). CoFeNiMnZnB as a high-entropy metal boride to boost the oxygen evolution reaction. <i>ACS Applied Materials and Interfaces</i>. American Chemical Society. <a href="https://doi.org/10.1021/acsami.2c11627">https://doi.org/10.1021/acsami.2c11627</a> X. Wang <i>et al.</i>, “CoFeNiMnZnB as a high-entropy metal boride to boost the oxygen evolution reaction,” <i>ACS Applied Materials and Interfaces</i>, vol. 14, no. 42. American Chemical Society, pp. 48212–48219, 2022. X. Wang, Y. Zuo, S. Horta, R. He, L. Yang, A. Ostovari Moghaddam, M. Ibáñez, X. Qi, A. Cabot, ACS Applied Materials and Interfaces 14 (2022) 48212–48219. Wang X, Zuo Y, Horta S, et al. CoFeNiMnZnB as a high-entropy metal boride to boost the oxygen evolution reaction. <i>ACS Applied Materials and Interfaces</i>. 2022;14(42):48212-48219. doi:<a href="https://doi.org/10.1021/acsami.2c11627">10.1021/acsami.2c11627</a> 122362023-01-16T09:51:10Z2026-07-07T14:04:14Z