简单的激光合成低贵金属催化剂可在性和酸性介质中实现高效的HER
Kangfan Xie1, Guoshuai Fu1, Ruiqi Xu1
1State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P.R. China.
研究人员开发了一种脉冲激光聚变方法,以制造高效的低贵金属电催化剂,用于演化反应 (HER). 这些新型催化剂在酸性和性条件下表现出卓越的性能和稳定性,为可扩展的工业应用铺平了道路.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 可扩展的水电解需要高效的,可批量生产的电催化剂来进行演化反应 (HER).
- 现有的催化剂在高电流密度下经常面临性能和稳定性的限制.
研究的目的:
- 开发一种新的,可扩展的方法来合成HER的高性能电催化剂.
- 在石墨烯和MXene支上研究Pd-CuInP2S6复合物的催化活性和稳定性.
主要方法:
- 使用脉冲激光融合方法在石墨烯或MXene Ti3C2纳米板上合成Pd-CuInP2S6复合材料.
- 在酸性 (0. 5M H2SO4) 和性 (1M KOH) 电解质中评估了电化学性能.
- 用密度功能理论 (DFT) 来分析HER增强的机制.
主要成果:
- 合成的催化剂表现出增强的电荷转移和丰富的活性位点,优于商业Pt/C.
- 在酸性 (-388 mV) 和性 (-455 mV) 介质中,在1000 mA cm-2下获得了显著的超电位.
- 经过10,000次CV循环和延长的运行证明了异常稳定性,超过了Pt/ C的耐用性.
结论:
- 脉冲激光聚变方法可实现高效和稳定的低贵金属电催化剂的可扩展生产.
- 从间歇性H和被替换的In原子的协同效应有助于增强HER活性.
- 这些发现为通过水电解的工业生产提供了有前途的途径.
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