[薄膜合金电极上二氧化碳还原的原位傅里叶变换红外光谱研究]

[In situ FTIRS studies of CO2 reduction on thin film alloy electrodes].

作者信息

Chen S, Xia S, Sun S

机构信息

State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Institute of Physical Chemistry, Xiamen University, 361005 Xiamen.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2000 Oct;20(5):610-1.

PMID:12945392

Abstract

The nanometer thin film alloy electrode (Sb-Pb-Pt/GC) was prepared by electrochemical methods. Excellent catalytic effect was observed on these film alloy material in the electro-reduction of carbon dioxide (CO2). The reduction can take place at potentials as high as -0.4 V. The oxidation of reduced products of CO2 on Sb-Pb-Pt/GC yielded current peaks at arrowed -0.08, 0.2 and 0.3 V, while the oxidation of reduction products on a nm-Pt/GC electrode gave rise a current peak near 0.4 V. The in situ FTIR spectroscopic studies confirmed at a molecule level that the products of CO2 reduction on Sb-Pb-Pt/GC are mainly organic acid and alcoholic compounds, while on a nm-Pt/GC electrode the production of CO2 is mainly CO species.

摘要

采用电化学方法制备了纳米薄膜合金电极（Sb-Pb-Pt/GC）。在二氧化碳（CO₂）的电还原过程中，观察到这些薄膜合金材料具有优异的催化效果。该还原反应可在高达 -0.4 V 的电位下发生。CO₂还原产物在 Sb-Pb-Pt/GC 上的氧化在箭头所指的 -0.08、0.2 和 0.3 V 处产生电流峰，而还原产物在纳米 Pt/GC 电极上的氧化在接近 0.4 V 处产生一个电流峰。原位傅里叶变换红外光谱研究在分子水平上证实，Sb-Pb-Pt/GC 上 CO₂还原的产物主要是有机酸和醇类化合物，而在纳米 Pt/GC 电极上 CO₂的产物主要是 CO 物种。