High efficient electrocatalytic oxidation of formic acid on Pt/polyindoles composite catalysts

High efficient electrocatalytic oxidation of formic acid on Pt/polyindoles composite catalysts
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Pt/聚吲哚复合催化剂高效电催化氧化甲酸

DOI:
10.1016/j.electacta.2010.01.017
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发表时间:
2010-03
影响因子:
6.6
通讯作者:
Yang, Ping
Yang, Ping
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhou, Weiqiang;Du, Yukou;Zhang, Hongmei;Xu, Jingkun;Yang, Ping

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通过在聚吲哚修饰的玻碳电极(GCE)上电沉积Pt,开发了4种新型复合催化剂:聚吲哚、聚5-甲氧基吲哚、聚5-硝基吲哚和聚5-氰吲哚。通过SEM、XRD和电化学分析对形成的复合催化剂进行了表征。与沉积在裸GCE和聚吡咯修饰的GCE上的Pt纳米粒子相比,这四种复合催化剂通过提高脱氢途径反应的选择性,从而在很大程度上抑制了有毒物质coads的生成,从而对甲酸电氧化表现出更高的催化活性。提出了Pt与多吲哚之间的协同作用以及Pt在多吲哚上的电化学活性表面积(EASA)的增加是其性能增强的原因。
Four novel composite catalysts have been developed by the electrodeposition of Pt onto glassy carbon electrode (GCE) modified with polyindoles: polyindole, poly(5-methoxyindole), poly(5-nitroindole) and poly(5-cyanoindole). As-formed composite catalysts are characterized by SEM, XRD and electrochemical analysis. Compared with Pt nanoparticles, respectively, deposited on the bare GCE and on the GCE modified with polypyrrole, the four newly developed composite catalysts exhibit higher catalytic activity towards formic acid electrooxidation by improving selectivity of the reaction via dehydrogenation pathway and thus mostly suppressing the generation of poisonous COadsspecies. The enhanced performance is proposed to come from the synergetic effect between Pt and polyindoles and the increase of electrochemical active surface area (EASA) of Pt on polyindoles.
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发表时间: 1993-11
期刊: --
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