Facile Reconstruction of Se-Regulated NiMo Nanorods for Efficient Anion Exchange Membrane Water Electrolysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 40094889.
- Also identified by DOI 10.1021/acs.nanolett.5c00347.
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Abstract
Developing platinum group metal (PGM)-free electrodes with high efficiency and stability is the ultimate goal for cost-effective anion exchange membrane water electrolysis (AEMWE), while it poses a significant challenge to PGM-free catalysts. Here, we present reconstructed NiMoSe<sub><i>x</i></sub> (r-NiMoSe<sub><i>x</i></sub>) nanorods as highly efficient catalysts for the oxygen evolution reaction (OER), in which Se can induce fast structural reconstruction, thereby creating a flexible surface. This approach constructs successive ion channels for mass transfer, thus significantly facilitating the OER performance. Consequently, r-NiMoSe<sub><i>x</i></sub>-based PGM-free AEMWE enables an exceptional current density of 3 A cm<sup>-2</sup> at 2.05 V, which can be stably run at 1 A cm<sup>-2</sup> at 1.70 V for 190 h with a low attenuation rate of 48.1 μV h<sup>-1</sup>, surpassing most previously reported PGM-free catalysts. More importantly, the r-NiMoSe<sub><i>x</i></sub> can maintain stable AEMWE performance after an almost half-year placement. This strategy contributes to developing next-generation highly efficient and durable PGM-free catalysts for green hydrogen production.