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IrNi Nanoparticles as Highly Efficient Electrocatalysts Towards the Oxygen Evolution Reaction in an Acidic Medium

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Proceedings of the 10th Hydrogen Technology Convention, Volume 3 (WHTC 2023)

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Abstract

The development of efficient and durable bifunctional electrocatalysts for oxygen evolution reaction (OER), still poses huge challenges. Herein, we utilize a facile hydrothermal method to synthesize a novel IrNi nanocrystals. In particular, the electronic structure is altered when a portion of the iridium atom is replaced by a Ni atom, which causes the center of the d band to shift downward, favoring the catalytic reaction. The overpotentials for OER of 273 mV at a current density of 10 mA cm−2, exceed the capabilities of commercial Ir catalysts. The alloying of Ir with Ni reduces the adsorption energy of oxygen intermediates to achieve a fast oxygen evolution reaction. This work highlights a potentially powerful strategy toward the general synthesis of novel, Ir-based alloy as highly active and durable bifunctional electrocatalysts for high-performance electrochemical overall-water-splitting devices.

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Sun, Y., Lv, H., Gao, D., Zhang, C. (2024). IrNi Nanoparticles as Highly Efficient Electrocatalysts Towards the Oxygen Evolution Reaction in an Acidic Medium. In: Sun, H., Pei, W., Dong, Y., Yu, H., You, S. (eds) Proceedings of the 10th Hydrogen Technology Convention, Volume 3. WHTC 2023. Springer Proceedings in Physics, vol 395. Springer, Singapore. https://doi.org/10.1007/978-981-99-8581-4_11

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  • DOI: https://doi.org/10.1007/978-981-99-8581-4_11

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