Shin Sangyong, Kim Jiwhan, Park Subin, Kim Hee-Eun, Sung Yung-Eun, Lee Hyunjoo
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea.
Chem Commun (Camb). 2019 May 30;55(45):6389-6392. doi: 10.1039/c9cc01593k.
Single atomic Pt supported on TiC was prepared from chloride Pt precursors, then the chloride ligands were intentionally removed by increasing the reduction temperature. The 0.2 wt% Pt/TiC catalyst reduced at 300 °C had more reduced Pt single-atoms with fewer chloride ligands and exhibited the highest currents for H2O2 formation in the electrochemical oxygen reduction reaction. Controlling the oxidation state of the single-atoms is very important to maximize the activity of the single-atom catalysts.
由氯化铂前驱体制备了负载在TiC上的单原子铂，然后通过提高还原温度有意去除氯配体。在300°C下还原的0.2 wt% Pt/TiC催化剂具有更多还原态的单原子且氯配体更少，在电化学氧还原反应中表现出最高的H2O2生成电流。控制单原子的氧化态对于最大化单原子催化剂的活性非常重要。
