Enhancing durability and activity toward oxygen evolution reaction using single-site Re-doped NiFeO x catalysts at ampere-level

Lyu, Xiang [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]; Dileep, Naduvile Purayil [Purdue University, West Lafayette, IN (United States)]; Pushkar, Yulia [Purdue University, West Lafayette, IN (United States)] (ORCID:0000000179496472); Pupucevski, Max [Giner, Inc., Newton, MA (United States)]; Lattimer, Judith [Giner, Inc., Newton, MA (United States)]; Colon-Mercado, Hector [Savannah River National Laboratory, Aiken, SC (United States)] (ORCID:0000000192815976); Ganesan, Prabhu [Savannah River National Laboratory, Aiken, SC (United States)] (ORCID:0009000292911428); Ryder, Matthew R. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000213638148); Keum, Jong K. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000255291373); Cullen, David A. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000225937866); Yu, Haoran [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000173042840); Meyer, III, Harry M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000349941664); Yang, Jun [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]; Serov, Alexey [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000331824726)

doi:10.1016/j.cej.2025.160518

DOE OSTI · 2538153

Enhancing durability and activity toward oxygen evolution reaction using single-site Re-doped NiFeO x catalysts at ampere-level

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Abstract

NiFeO x materials are known as among the most active catalysts toward oxygen evolution reaction (OER) for hydrogen generation in alkaline media. Nevertheless, the long-term durability of NiFeO x catalysts for OER is still too far to the industrial application. Herein, we prepared a NiFeReO x catalyst with single-site Re dopants and observed that the single-site Re dopants could significantly enhance the durability without compromising the activity. A cell voltage of 1.82 V without iR correction is noted at the current density of 3000 mA cm –2 in anion-exchange membrane water electrolyzer (AEMWE) with NiFeReO x catalyst, and a very small degradation is observed under 2000 and 1000 mA cm –2 , which remarkably outperforms the pristine NiFeO x . Additionally, the overpotential of 305 mV at 10 mA cm –2 is achieved with the NiFeReO x catalyst, which is lower than 50 mV compared with the pristine NiFeO x catalyst, together with a smaller Tafel slope of 54.3 mV dec -1 . The boosted OER durability and activity of the NiFeReO x catalyst could be attributed to the strong electron-withdrawing property of Re 7+ single atoms leading to the electronic structure optimization and stabilization of Ni/Fe active sites. Our insights propose a new path for designing NiFeO x catalysts with high durability and activity toward OER.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Green hydrogen NiFeOx catalyst Oxygen evolution reaction Re-doped Single atom

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Lyu, Xiang [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Dileep, Naduvile Purayil [Purdue University, West Lafayette, IN (United States)], Pushkar, Yulia [Purdue University, West Lafayette, IN (United States)] (ORCID:0000000179496472), Pupucevski, Max [Giner, Inc., Newton, MA (United States)], Lattimer, Judith [Giner, Inc., Newton, MA (United States)], Colon-Mercado, Hector [Savannah River National Laboratory, Aiken, SC (United States)] (ORCID:0000000192815976), Ganesan, Prabhu [Savannah River National Laboratory, Aiken, SC (United States)] (ORCID:0009000292911428), Ryder, Matthew R. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000213638148), Keum, Jong K. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000255291373), Cullen, David A. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000225937866), Yu, Haoran [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000173042840), Meyer, III, Harry M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000349941664), Yang, Jun [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Serov, Alexey [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000331824726). 2025-02-10. Enhancing durability and activity toward oxygen evolution reaction using single-site Re-doped NiFeO x catalysts at ampere-level. https://doi.org/10.1016/j.cej.2025.160518

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