Citation: Rui-Wen Yan, Bao-Kang Jin. Study of the electrochemical oxidation mechanism of formaldehyde on gold electrode in alkaline solution[J]. Chinese Chemical Letters, ;2013, 24(2): 159-162. shu

Study of the electrochemical oxidation mechanism of formaldehyde on gold electrode in alkaline solution

Rui-Wen Yan ,
Bao-Kang Jin ^,

1.
Department of Chemistry, Anhui University, Hefei 230039, China

Corresponding author: Bao-Kang Jin,
Received Date: 7 November 2012
Available Online: 31 December 2012
Fund Project: Doctoral Program Foundation of the Ministry of Education of China, the Foundation of Scientific Innovation Team of Anhui Province (No. 2006KJ007TD) (No. NECT-07-0002) and the 211 Project of Anhui University. (No. 2006KJ007TD)

The oxidation of formaldehyde in alkaline solution was studied by in situ rapid-scan time-resolved IR spectroelectrochemistry (RS-TR-FTIRS) method. In the potential range between 0.7 V and 0.2 V, the gem-diol anions were oxidized (according to the 2765 cm^-1 of v_H-O and 1034 cm^-1 of v_CO downward IR bands) and the formate ions appeared (according to the 1588, 1357 cm^-1 of the asymmetric and symmetric v_OCO and 1380 cm^-1 of δ_C-H upward IR bands) in aqueous solution. It was also confirmed that gem-diol anion was oxidized (according to the 2026, 1034 cm^-1 downward IR bands) to formate ions (according to the 1595, 1357, 1380 cm^-1 upward IR bands) and water (according to the 3427 cm^-1 of v_H-O upward IR band) in heavy water solution. The results illustrated that formaldehyde formed gem-diol anion in alkaline solution and was absorbed on the electrode surface; then gem-diol anion was oxidized to formate ions and water.
- Rapid-scan time-resolved FTIR,
- Formaldehyde,
- Electrochemical oxidation
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