Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6601362 | Electrochemistry Communications | 2014 | 5 Pages |
Abstract
Electrooxidation of hypophosphite (H2PO2â) on Ni electrode was investigated at the molecular level by external-reflection Fourier-transform infrared spectroscopy (FTIR), surface-enhanced infrared absorption spectroscopy with attenuated total reflection (ATR-SEIRAS), and shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). The results of external-reflection FTIR demonstrated that H2PO2â could be oxidized to HPO32 â at significantly low potentials (E < â 1.0 V vs. SCE). ATR-SEIRAS result showed that H2PO2âad could be adsorbed onto the Ni surface via O atoms. The adsorption orientation was further examined using SHINERS, and Ni-O stretching bands of metal-adsorbate vibration were directly detected. Comparative results of SHINERS and those obtained from the density functional theoretical calculation confirmed the adsorption orientation of H2PO2â. The present investigation verified for the first time the adsorption mechanism of H2PO2â electrooxidation on Ni surface through in situ spectroscopic data.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yi-Feng Jiang, Bei Jiang, Li-Kun Yang, Meng Zhang, Liu-Bin Zhao, Fang-Zu Yang, Wen-Bin Cai, De-Yin Wu, Zhi-You Zhou, Zhong-Qun Tian,