碳促进的负载于氧化钌纳米棒上的铂单原子用于增强电化学析氢反应
Carbon-Promoted Pt-Single Atoms Anchored on RuO Nanorods to Boost Electrochemical Hydrogen Evolution.
作者信息
Huang Jing-Fang, Hsieh Wen-Jun, Chen Jeng-Lung
机构信息
A Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan (R.O.C).
National Synchrotron Radiation Research Center, Science-Based Industrial Park, Hsinchu30076, Taiwan (R.O.C).
出版信息
ACS Appl Mater Interfaces. 2024 May 29;16(21):27504-27510. doi: 10.1021/acsami.4c06033. Epub 2024 May 17.
While efficient for electrochemical hydrogen evolution reaction (HER), Pt is limited by its cost and rarity. Traditional Pt catalysts and Pt single-atom (aPt) catalysts (Pt-SACs) face challenges in maintaining kinetically favorable HER pathways (Volmer-Tafel) at ultralow Pt loadings. Herein, carbon-promoted aPts were deposited on RuO without the addition of reductants. aPts confined on carbon-supported RuO nanorods (aPt/RuO/Carbon) promoted "inter-aPts" Tafel. aPt/RuO/Carbon is the Pt-SAC that retained underpotentially deposited H; additionally, its HER onset overpotential was "negative". The aPt/RuO/Carbon exhibited 260-fold higher Pt mass activity ()/turnover frequency (TOF) (522.7 A mg/528.4 s) than that of commercial Pt/C (1.9 A mg/1.9 s). In an ultralow Pt loading (0.19 μg cm), the HER rate-determining step maintained Volmer-Tafel and the Pt utilization efficiency was 100.3%.
虽然铂对电化学析氢反应（HER）有效，但它受到成本和稀有性的限制。传统的铂催化剂和铂单原子（aPt）催化剂（Pt-SACs）在超低铂负载量下维持动力学上有利的HER途径（Volmer-Tafel）面临挑战。在此，在不添加还原剂的情况下，将碳促进的aPts沉积在RuO上。限制在碳负载的RuO纳米棒上的aPts（aPt/RuO/碳）促进了“aPts间”的Tafel反应。aPt/RuO/碳是保留欠电位沉积氢的Pt-SAC；此外，其HER起始过电位为“负”。aPt/RuO/碳的铂质量活性（）/周转频率（TOF）（522.7 A mg/528.4 s）比商业Pt/C（1.9 A mg/1.9 s）高260倍。在超低铂负载量（0.19μg cm）下，HER速率决定步骤维持Volmer-Tafel反应，铂利用效率为100.3%。
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