雅努斯的结构性TaON/石墨烯类碳双支Pt电催化剂使得高效的氧降解反应成为可能
Zhongliang Li1, Lili Cao2, Ting Yang1
1School of Chemistry and Chemical Engineering, College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, P. R. China.
Journal of colloid and interface science
|August 8, 2024
概括
开发耐用的电催化剂,用于氧降解反应 (ORR) 是至关重要的. 这项研究引入了一种新的Janus结构TaON/石墨烯样碳 (GLC) 双载体,增强Pt催化剂活性和寿命.
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
- 催化剂是一种催化剂.
背景情况:
- 基电催化剂中的碳支在高电位的酸性/性溶液中腐蚀,限制了氧降解反应 (ORR) 的商业应用.
- 开发具有高活性和耐久性的强大的电催化剂仍然是一个重大挑战.
研究的目的:
- 为 (Pt) 电催化剂合成一种新的双载体材料,以提高ORR性能.
- 研究双载体对Pt.的催化活性和稳定性的协同效应.
主要方法:
- 在现场的分子自组装策略被用来合成一个Janus结构的TaON/石墨烯样碳 (GLC) 双载体.
- (Pt) 纳米粒子被装载到TaON/GLC载体上.
- 进行了电化学表征 (半波潜力,质量活性,特异性活性) 和长期耐用性测试.
- 使用结构特征和密度函数理论 (DFT) 计算来了解催化剂的特性.
主要成果:
- 合成的 Pt/TaON/GLC 催化剂显示出高半波潜力 (0.94 V 与 RHE 相比).
- 在0.9V下实现了优异的质量活性 (1.48A mgPt-1) 和特异性活性 (1.75mA cmPt-2).
- 观察到优异的长期耐用性,在性溶液中的10,000个循环后,质量活动仅减少8.0%.
- DFT计算显示了增强的界面电子密度,改进的电荷转移,增强的O2吸附和叠加的OO裂变.
结论:
- 斯的结构性TaON/石墨烯样碳 (GLC) 作为的有效双载体,显著提高了ORR性能.
- 在Pt/TaON/GLC接口上的协同效应是实现高活性和耐久性的关键.
- 这种方法为开发用于能源应用的基于Pt的先进电催化剂提供了一个有前途的战略.
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