%0 Journal Article
%T Deactivation Mechanism of Pt Anode in the Process of Electroxidation of p-Chlorophenol<br>对氯苯酚电氧化过程中Pt电极的失活机制
%A TONG Shao-ping
%A FEI Hui
%A ZHANG Tie-ming
%A MA Chun-an
%A <br>童少平
%A 费会
%A 张铁明
%A 马淳安
%J 环境科学
%D 2008
%I 
%X Deactivation of Pt electrode in the process of electroxidation of p-chlorophenol (p-CP) was investigated using linear sweep voltammetry, LC/MS and spectrum analysis techniques. The experiment results indicated that Pt would lose its electro-catalytic activity soon because polymer formed at the electrode surface. The in-site IR spectra of Pt showed two weak absorption bands appeared at 1 200 and 1 800 cm-1 during the oxidation of p-CP, which are characteristics of aromatic ether and carbonyl group, respectively. Increasing initial concentration of p-CP and pH value of solution would accelerate the deactivation speed of Pt. Acetonitrile lixivium for deactivated Pt was analyzed by LC/MS, and it was found that the polymers formed at the surface of Pt were some mixed compounds. The mechanism of polymerization includes the following ways: coupling reaction of organic radical each other; substituting reaction of organic radical with p-CP (or intermediates or small polymers).
%K anode deactivation
%K p-chlorophenol
%K polymer
%K organic radical<br>阳极失活
%K 对氯苯酚
%K 聚合物
%K 有机自由基
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=3E73C5F54A7FCF8C1186FC879D4D1DA8&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=DF92D298D3FF1E6E&sid=4ED782DFCB910AF4&eid=C2F690FF72A10B30&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=16