Integrating AESEC with the Respirometric method: A New Approach to Unraveling OER and Dissolution Phenomena
Xie C, Yuan J, Hariharan K, Virtanen S, Han J, Ogle K (2026)
Publication Type: Journal article
Publication year: 2026
Journal
Book Volume: 556
Article Number: 148319
DOI: 10.1016/j.electacta.2026.148319
Abstract
A novel operando methodology is presented that couples atomic emission spectroelectrochemistry (AESEC) with an optical oxygen sensing method (respirometry) to simultaneously monitor the kinetics of metal dissolution and oxygen evolution in real time during electrochemical experiments. To demonstrate the methodology, an investigation of Ni dissolution and the oxygen evolution reaction (OER) in the transpassive domain of nickel in 0.5 M H₂SO₄ is presented. Prior to secondary passivation, Ni dissolution was essentially faradaic with minimal OER. At higher potentials secondary passivation occurred with a sharp drop in the current and the dissolution rate. Beyond this point, the dissolution rate is constant or slightly decreased, while the OER increased systematically with potential. This may be interpreted in terms of a secondary passive film which blocks dissolution but is catalytic for OER.
Authors with CRIS profile
Karthikeyan Hariharan
Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)
Sannakaisa Virtanen
Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)
Involved external institutions
France (FR)How to cite
APA:
Xie, C., Yuan, J., Hariharan, K., Virtanen, S., Han, J., & Ogle, K. (2026). Integrating AESEC with the Respirometric method: A New Approach to Unraveling OER and Dissolution Phenomena. Electrochimica Acta, 556. https://doi.org/10.1016/j.electacta.2026.148319
MLA:
Xie, Chenyang, et al. "Integrating AESEC with the Respirometric method: A New Approach to Unraveling OER and Dissolution Phenomena." Electrochimica Acta 556 (2026).
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