One‐Step Syntheses of Face‐Centered Cubic OsxPt1‐x/C with Near‐Zero‐Overpotential Hydrogen Evolution from Electronic‐State Engineering
Abstract The loading states and crystal structure control of solid solution catalysts, which greatly influence the catalytic performance, have not yet been achieved simultaneously due to the limitations of previous synthetic methodologies. In this work, a one‐pot in situ polyol method is developed f...
में बचाया:
| मुख्य लेखकों: | , |
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| स्वरूप: | लेख |
| भाषा: | अंग्रेज़ी |
| प्रकाशित: |
Wiley
2025-07-01
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| श्रृंखला: | Advanced Science |
| विषय: | |
| ऑनलाइन पहुंच: | https://doi.org/10.1002/advs.202504161 |
| टैग: |
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| सारांश: | Abstract The loading states and crystal structure control of solid solution catalysts, which greatly influence the catalytic performance, have not yet been achieved simultaneously due to the limitations of previous synthetic methodologies. In this work, a one‐pot in situ polyol method is developed for the phase‐control synthesis of face‐centered cubic (fcc)‐dominated and well‐dispersed immiscible OsxPt1‐x/C. Most fcc‐OsxPt1‐x/C catalysts exhibit superior hydrogen evolution reaction (HER) catalytic activities compared to those of Pt/C catalysts. Remarkably, the overpotential of fcc‐Os0.3Pt0.7/C in 0.5 m H2SO4 at 10 mA·cm−2 is only 1.0 mV as the top record. In Os0.5Pt0.5/C and Os0.3Pt0.7/C, the weakening of H adsorption on Pt sites, resulting from electronic state adjustments induced by Os alloying, modify the reaction pathways by promoting H2 desorption from more favorable coupled sites, thereby achieving state‐of‐the‐art HER catalytic activities. |
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| आईएसएसएन: | 2198-3844 |