Ji, Sang Gu Kim, Haesol Lee, Woong Hee Oh, Hyung-Suk Choi, Chang Hyuck 2024-01-19T14:01:51Z 2024-01-19T14:01:51Z 2021-09-04 2021-09 2050-7488 https://pubs.kist.re.kr/handle/201004/116559 Carbon materials have been used as supporting substrates for electrocatalytically active species in many important reactions due to their high electrical conductivity and chemical inertness. To secure durable electrocatalysis, the fundamental understanding and prevention of corrosion are pivotal. The real-time monitoring of evolved CO2 enabled by differential electrochemical mass spectroscopy (DEMS) has provided potential-resolved information about carbon corrosion. However, this approach is typically limited to acidic media and it is unavailable in alkaline media because of the carbonation of the CO2 tracer. In this study, we investigate carbon corrosion using carbon monoxide (CO) as a corrosion marker. The electrochemical oxidation of selected model substrates (i.e., activated carbon, graphite, and Pt/C) is analyzed under dynamic and static potential excursions using DEMS. The results demonstrate that the CO tracer successfully monitored carbon corrosion in both acidic and alkaline media. The corrosion in alkaline media is qualitatively analogous to that in acidic media, but it is quantitatively alleviated, as confirmed by the decreased DEMS intensity and the decreased faradaic charge flowed. English ROYAL SOC CHEMISTRY PT/C CATALYSTS OXYGEN REDUCTION GLASSY-CARBON FUEL-CELLS SUPPORT ELECTROCATALYSTS DEGRADATION PLATINUM ELECTRODES BEHAVIOR Real-time monitoring of electrochemical carbon corrosion in alkaline media Article 10.1039/d1ta01748a 1 JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.35, pp.19834 - 19839 JOURNAL OF MATERIALS CHEMISTRY A 9 35 19834 19839 scie scopus 000653916700001 2-s2.0-85115024114 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article PT/C CATALYSTS OXYGEN REDUCTION GLASSY-CARBON FUEL-CELLS SUPPORT ELECTROCATALYSTS DEGRADATION PLATINUM ELECTRODES BEHAVIOR Carbon corrosion In-situ/operando analysis DEMS Alkaline condition