Tamaki Matsumura, Mika Fukunishi and Futoshi Matsumoto*,
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引用次数: 0
摘要
为了研究铂基纳米粒子催化剂中铂（Pt）的电子状态与其在碱性水溶液中电化学氧化甲醇（MeOH）和乙醇（EtOH）的催化活性之间的关系，我们合成了铂基纳米粒子催化剂，采用旋转电极技术评估了它们的电催化活性，并通过 X 射线光电子能谱（XPS）和 X 射线吸收光谱（XAS）分析了铂基催化剂表面铂的电子状态。最后，得到了催化剂表面铂原子的电催化活性与电子状态的对比图。这些曲线图呈现出所谓的火山型相关性，表明催化剂表面的铂原子存在一个最佳电子状态，可以最大限度地提高 MeOH 和 EtOH 的氧化活性。此外，用 Pb、Bi、In、Co 和 Cu 对铂电极进行腺体修饰也证实了最佳电子状态的存在。
The Relationship between the Electronic State of Pt in Pt-Based Nanoparticle Catalysts and Their Electrochemical Catalytic Activity in the Oxidation of Small Organic Compounds
To examine the relationship between the electronic state of platinum (Pt) in Pt-based nanoparticle (NP) catalysts and their catalytic activities in the electrochemical oxidation of methanol (MeOH) and ethanol (EtOH) in alkaline aqueous solutions, Pt-based NP catalysts were synthesized; their electrocatalytic activities were evaluated by rotating electrode techniques; and the electronic state of Pt in Pt-based catalyst surfaces was analyzed via X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). Finally, plots of the electrocatalytic activity vs electronic state of the Pt atoms on the catalyst surface were obtained. The plots exhibited a so-called volcano-type correlation, indicating that there is an optimum electronic state of Pt atoms on the catalyst surface for maximizing the MeOH and EtOH oxidation activities. In addition, the existence of the optimum electronic state was confirmed with adatom-modified Pt electrodes with Pb, Bi, In, Co, and Cu.
ACS OmegaChemical Engineering-General Chemical Engineering
CiteScore
6.60
自引率
4.90%
发文量
3945
审稿时长
2.4 months
期刊介绍：
ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.
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