通过在3D纳米结构Ni阵列上加入氧化过渡金属来定制结合能力,以加速性进化反应
Jaerim Kim1, Hyeonjung Jung2, Sang-Mun Jung1
1Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
Journal of the American Chemical Society
|December 17, 2020
概括
开发高效的电催化剂用于演化反应 (HER) 对可再生能源至关重要. 这项研究揭示了催化剂与氧性元素的配合如何优化结合能,增强性HER性能.
科学领域:
- 材料科学
- 电化学
- 可再生能源技术
背景情况:
- 有效的电催化剂对于性水的电解和可再生的生产至关重要.
- 性介质中的缓慢演变反应 (HER) 动力学限制了高性能的产生.
研究的目的:
- 调查基薄膜催化剂与氧性过渡金属合,以改善性HER活性.
- 建立氧结合能和性HER性能之间的火山关系.
主要方法:
- 在基于Ni的薄膜催化剂中加入氧性过渡金属原子.
- 对催化剂表面的和离子的结合能量的研究.
- 用于增强催化性能的三维 (3D) Ni纳米螺旋 (NH) 的制造.
主要成果:
- 用氧性原子化Ni催化剂调节和离子的结合能.
- 在OH结合能量和性HER活性之间建立了火山关系.
- 添加的Ni催化剂表现出最佳的结合能,促进水分离并增强HER活性.
- 由于加快了水吸附,3D Ni纳米螺旋带有Cr剂显著增强了催化活性.
结论:
- 该研究提供了高效的双金属电催化剂的合理设计策略,用于性HER使用丰富的土元素.
- 通过兴奋剂优化结合能量是提高性溶液中的HER动力学的关键.
- 开发的Cr-doped Ni纳米螺旋体代表了可再生能源技术的有希望的进步.
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