Figure 1. (a) RDE linear sweep voltammograms for a Pt-poly electrode in oxygen-saturated 0.1 M NaOH at 1600 rpm. An effectiveness factor (EF) model is imposed on the data to simulate the effects of various Thiele moduli (ϕ_Th). As the value of ϕ_Th increases, the electrode requires a greater overpotential to reach the mass-limiting current. (b, c) Effects of ϕ_Th on the kinetic current measured at 0.9 V vs RHE (panel (b)) and at 0.8 V vs RHE (panel (c)), using a model from the literature that has been detailed in the Supporting Information. Figure 2. H_UPD analysis for a pure Pt (yellow) and Pt monolayer electrocatalyst (blue) developed within our group.(5) The H_UPD peak is integrated from 0.05 V to 0.40 V vs RHE, using either a constant or slanted baseline shown by the dotted lines. CV curves were obtained in Ar-saturated 0.1 M HClO₄, using a scan rate of 50 mV/s without electrode rotation. [Reprinted with permission from ref (29). Copyright 2017, Elsevier.] Figure 3. CO stripping voltammogram (scan rate = 10 mV/s) for Pt/C and Pt-monolayer electrocatalyst in an Ar-saturated 0.1 M HClO₄ electrolyte under no rotation. Raw currents are shown as dashed lines, while the background-subtracted currents are shown as solid lines. [Reprinted with permission from ref (29). Copyright 2017, Elsevier.] Figure 4. ORR specific activities for the different ECSA measuring protocols. Results for both the novel and standard Pt electrocatalyst are shown in blue and yellow, respectively. Error bars represent the standard deviation of the ECSA measurements. [Reprinted with permission from ref (29). Copyright 2017, Elsevier.] Figure 5. RDE linear sweep voltammograms for a Pt-poly electrode in oxygen-saturated 0.1 M NaOH at 1600 rpm. The black curve shows the properly normalized I–V curve, using eq 5 (in the case of Pt-poly electrode, A_ECSA = A_RDE). The dotted green line represents a normalized I–V curve derived if the magnitude of A_ECSA is underestimated to 50% of the real value, and the solid green line represents a normalized I–V curve assuming a 2-fold overestimated A_ESCA. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acscatal.0c03028.

• Oxygen reduction kinetic data on planar polycrystalline Pt electrode and electrochemical effectiveness factor modeling (PDF)

Oxygen reduction kinetic data on planar polycrystalline Pt electrode and electrochemical effectiveness factor modeling (PDF) The authors declare no competing financial interest. Electronic Supporting Information files are available without a subscription to ACS Web Editions. The American Chemical Society holds a copyright ownership interest in any copyrightable Supporting Information. Files available from the ACS website may be downloaded for personal use only. Users are not otherwise permitted to reproduce, republish, redistribute, or sell any Supporting Information from the ACS website, either in whole or in part, in either machine-readable form or any other form without permission from the American Chemical Society. For permission to reproduce, republish and redistribute this material, requesters must process their own requests via the RightsLink permission system. Information about how to use the RightsLink permission system can be found at http://pubs.acs.org/page/copyright/permissions.html. The authors gratefully acknowledge support from the U.S. DOE Office of Basic Energy Sciences, Division of Chemical Sciences (Nos. FG-02-05ER15686 and DE-SC0021008) and the National Science Foundation (NSF) (Nos. CBET-1702471 and CHE 1800197). This article references 38 other publications.

中文翻译：

---

严格评估纳米粒子电催化剂固有活性的关键实践

图1.（a）在1600 rpm的氧气饱和的0.1 M NaOH中，Pt聚电极的RDE线性扫描伏安图。将有效性因子（EF）模型强加给数据以模拟各种Thiele模量（ϕ _Th）的影响。随着ϕ _Th值的增加，电极需要更大的超电势才能达到质量极限电流。（b，c）使用文献中详细描述的模型，ϕ _Th对在0.9 V vs RHE（面板（b））和0.8 V vs RHE（面板（c））下测得的动电流的影响支持信息。图2.我们小组中开发的纯Pt（黄色）和Pt单层电催化剂（蓝色）的H _UPD分析。（5）H _UPD使用虚线所示的恒定或倾斜基线，将峰值相对于RHE的0.05 V至0.40 V积分。在Ar饱和的0.1 M HClO _4中，使用50 mV / s的扫描速率，无需电极旋转，即可获得CV曲线。[经参考文献（29）许可转载。版权所有2017，Elsevier。]图3.在Ar饱和的0.1 M HClO _4中，Pt / C和Pt单层电催化剂的CO溶出伏安图（扫描速率= 10 mV / s）。电解液不旋转。原始电流显示为虚线，而减去背景的电流显示为实线。[经参考文献（29）许可转载。版权所有，Elsevier，2017年。]图4.不同ECSA测量协议的ORR特定活动。新型和标准Pt电催化剂的结果分别以蓝色和黄色显示。误差棒代表ECSA测量的标准偏差。[经参考文献（29）许可转载。版权，Elsevier，2017年。]图5.氧饱和的0.1 M NaOH中1600 rpm的Pt聚电极的RDE线性扫描伏安图。黑色曲线显示了正确归我- V曲线，使用等式5（在铂-聚电极的情况下，甲_ECSA =一个_RDE）。绿点虚线表示归一化的I – V曲线，如果A _ECSA的幅度被低估至实际值的50％，而实心绿线则代表归一化的I – V曲线，假定其高估了2倍的A _ESCA。可从https://pubs.acs.org/doi/10.1021/acscatal.0c03028免费获得支持信息。

• 平面多晶Pt电极上的氧还原动力学数据和电化学效应因子建模（PDF）

平面多晶Pt电极上的氧还原动力学数据和电化学效应因子建模（PDF）作者声明没有竞争性的财务利益。无需订阅ACS Web版本即可获得电子支持信息文件。美国化学学会在任何可版权保护的支持信息中拥有版权权益。ACS网站上提供的文件只能下载供个人使用。未经美国化学学会的许可，不得以其他方式允许用户以机器可读形式或任何其他形式全部或部分复制，重新发布，重新分发或出售ACS网站上的任何支持信息。为了获得复制，重新发布和重新分发此材料的许可，请求者必须通过RightsLink权限系统处理自己的请求。有关如何使用RightsLink权限系统的信息，请访问http://pubs.acs.org/page/copyright/permissions.html。作者非常感谢美国能源部基础能源科学办公室化学科学部（FG-02-05ER15686和DE-SC0021008）和美国国家科学基金会（NSF）（CBET-1702471和CHE 1800197）的支持。 。本文引用了其他38个出版物。FG-02-05ER15686和DE-SC0021008）和美国国家科学基金会（NSF）（编号CBET-1702471和CHE 1800197）。本文引用了其他38个出版物。FG-02-05ER15686和DE-SC0021008）和美国国家科学基金会（NSF）（编号CBET-1702471和CHE 1800197）。本文引用了其他38个出版物。