铂纳米粒子电极上NO吸附和还原的CV及原位FTIR研究

程前; 姜艳霞; 曾冬梅; 孙世刚

doi:10.61558/2993-074X.2014

电化学 >

2009 , Vol. 15 >Issue 4: 392 - 396

DOI: https://doi.org/10.61558/2993-074X.2014

研究论文

铂纳米粒子电极上NO吸附和还原的CV及原位FTIR研究

程前 ,
姜艳霞 ,
曾冬梅 ,
孙世刚

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厦门大学固体表面物理化学国家重点实验室化学化工学院化学系;

收稿日期: 2009-11-28

修回日期: 2009-11-28

网络出版日期: 2009-11-28

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Cyclic Voltammetric and in-situ FTIR Spectroscopic Studies of Adsorption and Reduction of NO on Electrode of Pt Nanoparticles

CHENG Qian ,
JIANG Yan-xia ,
ZENG Dong-mei ,
SUN Shi-gang

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(State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China

Received date: 2009-11-28

Revised date: 2009-11-28

Online published: 2009-11-28

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摘要

运用电化学循环伏安法(CV)和原位傅里叶变换红外反射光谱(in situ FTIRS)研究了酸性介质中铂纳米粒子电极(nm-Pt/GC)上NO吸附及其电催化还原过程.结果表明,NO分子的吸附是电催化还原的重要步骤.在铂纳米粒子电极上饱和吸附的NO存在两种不同键合强度的吸附态,其中弱吸附的NO(NOW)在0.60 V至-0.05 V电位区间还原生成N2O和NH4+;而强吸附的NO(NOS)则在-0.05 V至-0.15 V区间还原,其产物为NH+.

关键词： 铂纳米粒子; 电催化; NO; 吸附和还原; 原位FITR反射光谱

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程前 , 姜艳霞 , 曾冬梅 , 孙世刚 . 铂纳米粒子电极上NO吸附和还原的CV及原位FTIR研究[J]. 电化学, 2009 , 15(4) : 392 -396 . DOI: 10.61558/2993-074X.2014

Abstract

Adsorption and reduction of NO on electrode of Pt nanoparticles in acid solutions were studied by means of cyclic voltammetry(CV) and in-situ FTIR spectroscopy.The results indicated that the reduction of NO is a complicated process including the adsorption of NO on electrode surface.Two types of surface-bonded NO were determined on Pt nanoparticles.The weakly adsorbed NO was reduced between 0.6 V and-0.05 V,which yielded nitrous oxide(N2O) and ammonium(NH+4) as products;while the strongly bonded NO was reduced at more negative potentials between-0.05V and-0.15V,producing only NH4+ species.

Key words： nanostructured Pt electrode; NO; adsorption and electrocatalytic reduction; cyclic voltammetry; in-situ FTIR spectroscopy

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