Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide,ACS Catalysis

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Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-06-01 00:00:00 , DOI: 10.1021/acscatal.8b01340
Ezra L. Clark _{1,

2} , Joaquin Resasco _{1,

2} , Alan Landers _{3,

4} , John Lin _{4,

5} , Linh-Thao Chung ₂ , Amber Walton ₂ , Christopher Hahn _{4,

5,

6} , Thomas F. Jaramillo _{4,

5} , Alexis T. Bell _{1,

2}

Affiliation

Objective evaluation of the performance of electrocatalysts for CO₂ reduction has been complicated by a lack of standardized methods for measuring and reporting activity data. In this perspective, we advocate that standardizing these practices can aid in advancing research efforts toward the development of efficient and selective CO₂ reduction electrocatalysts. Using information taken from experimental studies, we identify variables that influence the measured activity of CO₂ reduction electrocatalysts and propose procedures to account for these variables in order to improve the accuracy and reproducibility of reported data. We recommend that catalysts be measured under conditions which do not introduce artifacts from impurities, from either the electrolyte or counter electrode, and advocate the acquisition of data measured in the absence of mass transport effects. Furthermore, measured rates of electrochemical reactions should be normalized to both the geometric electrode area as well as the electrochemically active surface area to facilitate the comparison of reported catalysts with those previously known. We demonstrate that, when these factors are accounted for, the CO₂ reduction activities of Ag and Cu measured in different laboratories exhibit little difference. Adoption of the recommendations presented in this perspective would greatly facilitate the identification of superior catalysts for CO₂ reduction arising solely from changes in their composition and pretreatment.

中文翻译：

二氧化碳电化学还原研究的数据采集和报告标准和协议

由于缺乏用于测量和报告活性数据的标准化方法，对用于CO ₂还原的电催化剂性能的客观评估变得很复杂。从这个角度出发，我们主张对这些做法进行标准化可以帮助推动研究工作，以开发高效且选择性的CO ₂还原电催化剂。利用从实验研究中获得的信息，我们确定了影响CO ₂实测活性的变量还原电催化剂并提出解决这些变量的程序，以提高报告数据的准确性和可重复性。我们建议催化剂的测量条件下，不得从电解质或对电极的杂质中引入假象，并提倡获取在没有质量传输效应的情况下测得的数据。此外，应将测得的电化学反应速率归一化为几何电极面积以及电化学活性表面积，以利于将报道的催化剂与先前已知的催化剂进行比较。我们证明，考虑到这些因素，CO ₂不同实验室测得的Ag和Cu的还原活性差异不大。采用该观点提出的建议将极大地促进鉴定仅由其组成和预处理的变化而产生的用于CO ₂还原的优良催化剂。

更新日期：2018-06-01

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