Targeted doping induces interfacial orientation for constructing surface-functionalized Schottky junctions to coordinate redox reactions in water electrolysis
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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11
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Advanced Powder Materials, Volume 3, issue 5, pp. 1-11
Abstract
Tuning the surface properties of catalysts is an effective method for accelerating water electrolysis. Herein, we propose a directional doping and interfacial coupling strategy to design two surface-functionalized Schottky junction catalysts for coordinating the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Directional doping with B/S atoms endows amphiphilic g-C3N4 with significant n-/p-type semiconductor properties. Further coupling with Fe3C modulates the energy band levels of B–C3N4 and S–C3N4, thus resulting in functionalized Schottky junction catalysts with specific surface-adsorption properties. The space-charge region generated by the dual modulation induces a local “OH−- and H+-enriched” environment, thus selectively promoting the kinetic behavior of the OER/HER. Impressively, the designed B–C3N4@Fe3C||S–C3N4@Fe3C pair requires only a low voltage of 1.52 V to achieve efficient water electrolysis at 10 mA cm−2. This work highlights the potential of functionalized Schottky junction catalysts for coordinating redox reactions in water electrolysis, thereby resolving the trade-off between catalytic activity and stability.Description
Publisher Copyright: © 2024 Central South University.
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Yang, G, Yang, T, Wang, Z, Wang, K, Zhang, M, Lund, P D & Yun, S 2024, 'Targeted doping induces interfacial orientation for constructing surface-functionalized Schottky junctions to coordinate redox reactions in water electrolysis', Advanced Powder Materials, vol. 3, no. 5, 100224, pp. 1-11. https://doi.org/10.1016/j.apmate.2024.100224