Han, Man Ho Ko, Young-Jin Lee, Seung Yeon Lim, Chulwan Lee, Woong Hee Pin, Min Wook Koh, Jai Hyun Kim, Jihyun Kim, Woong Min, Byoung Koun Oh, Hyung-Suk 2024-01-19T13:00:31Z 2024-01-19T13:00:31Z 2022-01-25 2022-02 0378-7753 https://pubs.kist.re.kr/handle/201004/115779 Although stainless steel is a promising candidate for oxygen evolution reaction (OER) electrodes, chalcogenization is typically necessary to avoid surface passivation. Herein, we modify the surface of SUS304 by selenization under mild conditions. The optimal selenization temperature (500 degrees C) is determined by analyzing the surface morphology and elemental distribution. The electrode composition and the role of Se in improving OER activity are clarified using X-ray photoelectron spectroscopy depth profiling. The electrode selenized at 500 degrees C is rich in oxygen vacancies and had a high Ni content after electrochemical pre-activation. Moreover, the overpotential is only 284.3 mV at 10 mA cm(-2) and no potential degradation occurred over 160 h, indicating excellent stability under alkaline conditions. Further, high stability is achieved during CO2 reduction in a real water matrix. These results provide new insights for modifying commercial stainless-steel electrodes to maximize OER activity for alkaline water splitting and neutral CO2 electrolysis. English ELSEVIER Thermo-selenized stainless steel as an efficient oxygen evolution electrode for water splitting and CO2 electrolysis in real water matrices Article 10.1016/j.jpowsour.2021.230953 1 JOURNAL OF POWER SOURCES, v.521 JOURNAL OF POWER SOURCES 521 N scie scopus 000742842100004 2-s2.0-85122064085 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article SURFACE OXIDATION ELECTROCATALYSTS REDUCTION CATALYSTS MN NI (OXY)HYDROXIDE NANOSHEETS HYDROXIDE OXIDES Stainless steel Selenization Oxygen evolution reaction (OER) Water splitting CO2 electrolysis