瓦纳金属氧化物的间接PtCo电催化剂增加了电荷密度,以促进的进化
Jingjing Zhang1, Wei Deng1, Yun Weng2
1School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
Molecules (Basel, Switzerland)
|April 13, 2024
概括
本研究提出了一种新方法,用于创建高效的演化反应 (HER) 催化剂. 开发的PtCoVO/g-C3N4催化剂表现出卓越的性能和稳定性,可用于可持续的生产.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 开发用于演化反应 (HER) 的高效电催化剂对于可持续的生产至关重要.
- 目前的挑战包括制造廉价,耐用和高效的HER催化剂.
- 先进的HER催化剂的可控合成仍然是一个重大障碍.
研究的目的:
- 为快速合成高活性进化催化剂制定通用战略.
- 为了研究新型PtCoVO/g-C3N4纳米复合材料的HER性能.
- 探索氧气空缺和金属兴奋剂对催化剂性能的影响.
主要方法:
- 一种可控制的插入方法与溶热工艺相结合.
- 通过控制乙醇反应速度,合成甲 (HxV2O5).
- 通过溶热油/水接口方法在石墨碳化物 (g-C3N4) 纳米片上支PtCoVO的制备.
主要成果:
- 与PtCo/g-C3N4和PtCoV/g-C3N4.4相比,PtCoVO/g-C3N4表现出更优异的HER性能.
- 催化剂显示出低超电位 (η10 = 92 mV) 和塔菲尔斜率 (65.21 mV dec−1).
- 在48小时的连续测试中观察到出色的稳定性.
结论:
- 该PtCoVO/g-C3N4纳米合金催化剂提供了由于强大的金属支相互作用的异常抵抗迁移和腐蚀.
- 在HxV2O5中的氧空位显著影响催化剂的电特性,增强HER活性.
- 密度函数理论 (DFT) 的计算证实,同时使用 Pt,Co 和 V 剂可以提高费米级状态的密度,从而提高催化效率.
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