富缺陷Ru纳米片驱动高分散Pt催化剂增强电催化析氢性能  

DEFECTS-RICH Ru NANOPLATE DRIVED HIGHLY DISPERSED Pt ATOMS TO BOOST HYDROGEN EVOLUTION REACTION

作　　者：王乾森 程庆庆 李军[1] 杨辉[1,2] Wang Qiansen;Cheng Qingqing;Li Jun;Yang Hui(Shanghai Advanced Research Institute,Chinese Academy of Science,Shanghai 201210,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]中国科学院上海高等研究院,上海201210 [2]上海科技大学物质学院,上海201210

出　　处：《太阳能学报》2024年第9期14-19,共6页Acta Energiae Solaris Sinica

基　　金：科技部重点研发计划(2021YFB4000200);国家自然科学基金(22002184)。

摘　　要：采用无电沉积方法,以富缺陷片状Ru纳米颗粒(Ru NPs)为基底,制备出高度分散Pt负载在Ru表面的催化剂(Ru NPs@Pt)。单电子顺磁共振实验证明了缺陷Ru的存在,X射线衍射和透射电镜的结果证实了高分散原子或亚纳米Pt的存在。所制备的电催化剂HER交换电流密度高达2.39 mA/cm^(2),明显高于商业化Pt/C;50 mV过电位下质量活性高达32.34 A/mgPt,是商业化Pt/C的9.37倍,且在低载量(2μg/cm^(2))下表现出远超商业化Pt/C的稳定性,证明了缺陷Ru基底对Pt电催化性能及耐久性的提升作用。Platinum(Pt)is the state-of-the-art electrocatalyst towards hydrogen evolution reaction(HER),but its atom-utilization efficiency and durability need to be further improved.In this work,we prepared the highly dispersed Pt atoms supported on defects-rich Ru nanoparticles substrate(Ru NPs@Pt)by substrate-enhanced electroless deposition method.The results of single electron paramagnetic resonance confirm the existence of the defects on Ru NPs substrate and the X-ray diffraction combined with transmission electron microscopy reveals the highly dispersed Pt atoms.Exchange current density of HER on the Ru NPs@Pt is up to 2.39 mA/cm^(2),which is significantly higher than that of commercial Pt/C,demonstrating the boosted HER intrinsic activity.Mass activity is as high as 32.34 A/mgPt that is 9.37 times higher than that of Pt/C at an overpotential of 50 mV.Significantly,the Ru NPs@Pt delivers the greatly enhanced durability in comparison with the Pt/C one even under the ultralow Pt loading(2μg/cm^(2)),indicating that the defects-rich Ru NPs substrate could improve the electrocatalytic activity and durability of Pt simultaneously.

关 键 词：电催化 析氢反应 缺陷 耐久性 PT 

分 类 号：TM911.4[电气工程—电力电子与电力传动]