{"title":"Current perspectives on rational design of anode electrocatalysts exhibiting CO-tolerance for fuel cells","authors":"","doi":"10.1016/j.coelec.2024.101582","DOIUrl":null,"url":null,"abstract":"<div><p>Anode catalysis reduces the cost and remarkably improves the fuel cell performance; however, it is often neglected owing to its fast kinetics. Currently, the majority of hydrogen is obtained by reforming and purifying the hydrocarbons containing impurities such as CO, CO<sub>2</sub>, and H<sub>2</sub>S. CO adsorbs more strongly than hydrogen onto the anode catalysts, inhibiting hydrogen oxidation and resulting in performance degradation. Although activity enhancement is essential, impurity tolerance should be preferred over activity for fuel-cell anode catalysts. Various studies have reported improved CO tolerance via lowering the intrinsic CO adsorption energy of the catalyst by tuning the electronic structure or modulating the OH adsorption energy by placing oxophilic materials near the catalysts. Herein, we categorize recent noteworthy studies according to their strategies and present innovative design principles for CO-resistant anode catalysts.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":null,"pages":null},"PeriodicalIF":7.9000,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451910324001431/pdfft?md5=cf13dcdd20deb47ff48eb77562c3a9c0&pid=1-s2.0-S2451910324001431-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Opinion in Electrochemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2451910324001431","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Anode catalysis reduces the cost and remarkably improves the fuel cell performance; however, it is often neglected owing to its fast kinetics. Currently, the majority of hydrogen is obtained by reforming and purifying the hydrocarbons containing impurities such as CO, CO2, and H2S. CO adsorbs more strongly than hydrogen onto the anode catalysts, inhibiting hydrogen oxidation and resulting in performance degradation. Although activity enhancement is essential, impurity tolerance should be preferred over activity for fuel-cell anode catalysts. Various studies have reported improved CO tolerance via lowering the intrinsic CO adsorption energy of the catalyst by tuning the electronic structure or modulating the OH adsorption energy by placing oxophilic materials near the catalysts. Herein, we categorize recent noteworthy studies according to their strategies and present innovative design principles for CO-resistant anode catalysts.
阳极催化可降低成本并显著提高燃料电池的性能；然而，由于其快速的动力学特性，阳极催化常常被忽视。目前，大部分氢气是通过重整和提纯含有 CO、CO 和 HS 等杂质的碳氢化合物获得的。CO 在阳极催化剂上的吸附力比氢更强，会抑制氢氧化，导致性能下降。虽然提高活性至关重要，但对于燃料电池阳极催化剂来说，杂质耐受性应优先于活性。各种研究报告称，通过调整催化剂的电子结构降低催化剂对 CO 的固有吸附能，或通过在催化剂附近放置亲氧材料调节 OH 吸附能，可提高对 CO 的耐受性。在此，我们将近期值得关注的研究按照其策略进行分类，并介绍抗 CO 阳极催化剂的创新设计原则。
期刊介绍：
The development of the Current Opinion journals stemmed from the acknowledgment of the growing challenge for specialists to stay abreast of the expanding volume of information within their field. In Current Opinion in Electrochemistry, they help the reader by providing in a systematic manner:
1.The views of experts on current advances in electrochemistry in a clear and readable form.
2.Evaluations of the most interesting papers, annotated by experts, from the great wealth of original publications.
In the realm of electrochemistry, the subject is divided into 12 themed sections, with each section undergoing an annual review cycle:
• Bioelectrochemistry • Electrocatalysis • Electrochemical Materials and Engineering • Energy Storage: Batteries and Supercapacitors • Energy Transformation • Environmental Electrochemistry • Fundamental & Theoretical Electrochemistry • Innovative Methods in Electrochemistry • Organic & Molecular Electrochemistry • Physical & Nano-Electrochemistry • Sensors & Bio-sensors •
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