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PtAg Alloy Nanoparticles Embedded in Polyaniline as Electrocatalysts for Formate Oxidation and Hydrogen Evolution
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-03-24 , DOI: 10.1021/acsanm.0c00442 Meng Huang 1 , Hanyu Zhang 1 , Song Yin 1 , Xiaoxue Zhang 1 , Jun Wang 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-03-24 , DOI: 10.1021/acsanm.0c00442 Meng Huang 1 , Hanyu Zhang 1 , Song Yin 1 , Xiaoxue Zhang 1 , Jun Wang 1
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We successfully synthesized partly crystalline polyaniline (c-PANI) induced by PtAg alloy nanoparticles (c-PANI@PtAg). The liquid phase reduction PtAg nanoparticles were directly embedded in the c-PANI on a Pt sheet (c-PANI@PtAg/Pt) by in situ polymerization. c-PANI@PtAg/Pt demonstrated excellent electrocatalysis for formate oxidation reaction (FOR) and hydrogen evolution reaction (HER). The ordered structure of c-PANI showed a peak-separation effect and therefore significantly enhanced the catalytic path selectivity of c-PANI@PtAg/Pt for FOR. Meanwhile the current holding ratio after 1000 circles of voltamogram scanning reaches 91.4%. Research on the electrocatalysis of c-PANI@Pt1Ag0.5/Pt for HER indicated the overpotentials at 1.0 mA cm–2 in both acid and alkaline solutions were more positive than that of pure Pt. Moreover, c-PANI@PtAg/Pt exhibits a much lower overpotential of 68 mV than that of 115 mV of Pt and a smaller Tafel slope of 27 mV dec–1 than that of 46 mV dec–1 of Pt.
中文翻译：
嵌入聚苯胺中的PtAg合金纳米颗粒作为电催化剂用于甲酸酯氧化和氢气释放
我们成功地合成了由PtAg合金纳米粒子（c-PANI @ PtAg）诱导的部分结晶聚苯胺（c-PANI）。通过原位聚合将液相还原的PtAg纳米颗粒直接嵌入在Pt片材上的c-PANI中（c-PANI @ PtAg / Pt）。c-PANI @ PtAg / Pt对甲酸氧化反应（FOR）和析氢反应（HER）表现出出色的电催化作用。c-PANI的有序结构表现出峰分离效果，因此显着提高了c-PANI @ PtAg / Pt对FOR的催化路径选择性。同时伏安扫描1000圈后的电流保持率达到91.4％。c-PANI@Pt1Ag0.5/Pt对HER的电催化研究表明，在1.0 mA cm –2处有超电势在酸性和碱性溶液中，Pt均比纯Pt阳性。此外，c-PANI @ PtAg / Pt的过电位68 mV比Pt的115 mV低得多，并且Tafel斜率比Pt的46 mV dec –1小，Tafel斜率为27 mV dec –1。
更新日期：2020-03-24
中文翻译：
嵌入聚苯胺中的PtAg合金纳米颗粒作为电催化剂用于甲酸酯氧化和氢气释放
我们成功地合成了由PtAg合金纳米粒子（c-PANI @ PtAg）诱导的部分结晶聚苯胺（c-PANI）。通过原位聚合将液相还原的PtAg纳米颗粒直接嵌入在Pt片材上的c-PANI中（c-PANI @ PtAg / Pt）。c-PANI @ PtAg / Pt对甲酸氧化反应（FOR）和析氢反应（HER）表现出出色的电催化作用。c-PANI的有序结构表现出峰分离效果，因此显着提高了c-PANI @ PtAg / Pt对FOR的催化路径选择性。同时伏安扫描1000圈后的电流保持率达到91.4％。c-PANI@Pt1Ag0.5/Pt对HER的电催化研究表明，在1.0 mA cm –2处有超电势在酸性和碱性溶液中，Pt均比纯Pt阳性。此外，c-PANI @ PtAg / Pt的过电位68 mV比Pt的115 mV低得多，并且Tafel斜率比Pt的46 mV dec –1小，Tafel斜率为27 mV dec –1。
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