Photoelectrocatalytic reduction of CO2 on titania nanotube arrays modified by Pd and RGO

Photoelectrocatalytic reduction of CO2 on titania nanotube arrays modified by Pd and RGO
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Pd和RGO修饰的二氧化钛纳米管阵列光电催化还原CO2

DOI:
10.1007/s10853-018-2319-z
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发表时间:
2018-04
期刊:
J Mater Sci
影响因子:
--
通讯作者:
罗胜联
罗胜联
中科院分区:
其他
文献类型:
--
作者:
Yuxing Ru;杨丽霞;Yue Li;Wenjing Jiang;Yaobang Li;罗艳;杨利明;李婷婷;罗胜联

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采用在软钛丝上生长的Pd纳米颗粒(NPs)和还原氧化石墨烯(RGO)共修饰的阳极TiO 2纳米管阵列(TNTs),研究了其光电催化还原CO2的性能。在辐照下,在Ti线周围生长的对齐的TNT提供用于电子转移到Pd/RGO层的定向路径,其中Pd NP充当电子捕获中心,并且RGO层充当具有用于还原CO2的丰富电子的存储界面。提出了水相体系中CO_2电离为CO_3 ~(2-)是CO_2后续还原的重要过程。此外,该完整性使得所得到的Pd/RGO/TNT/Ti线在电化学电池中成为上级阴极,提高了由外部电势辅助的CO2转化的效率。甲醇和乙醇的最高产率分别为1624和536 nmol/cm ~ 2·h。
Photoelectrocatalytic reduction of CO2 was investigated over Pd nanoparticles (NPs) and reduced graphene oxide (RGO) co-modified anodic TiO2 nanotubes arrays (TNTs) which were grown on a soft Ti wire. Under irradiation, aligned TNTs grown around Ti wire provide orientated pathways for electron transferring to Pd/RGO layers where Pd NPs act as electrons trapping centers and RGO layers function as storage interface with rich electrons for reducing CO2. It is proposed that the ionization of CO2 to CO32– in aqueous system is the vital process for the following reduction of CO2. Moreover, the integrity enables the resulting Pd/RGO/TNTs/Ti wire a superior cathode in an electrochemical cell, improving the efficiency in CO2 conversion assisted by external potential. The highest yields of methanol and ethanol were 1624 and 536 nmol/cm2 h, respectively.
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