Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation

doi:10.1016/j.cjche.2017.08.013

Chin.J.Chem.Eng. ›› 2017, Vol. 25 ›› Issue (12): 1871-1876.DOI: 10.1016/j.cjche.2017.08.013

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Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation

Dongyan Li¹, Chen Gu², Feng Han², Zhaoxiang Zhong², Weihong Xing²

1. Department of Chemical Engineering and Materials, Nanjing Polytechnic Institute, Nanjing 210048, China;
2. State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

Received:2017-07-16 Revised:2017-08-23 Online:2018-01-18 Published:2017-12-28
Contact: Zhaoxiang Zhong,E-mail addresses:zhongzx@njtech.edu.cn;Weihong Xing,E-mail addresses:xingwh@njtech.edu.cn.
Supported by:
Supported by the National Key R&D Program (2016YFC0204000), the National Natural Science Foundation of China (U1510202), and the Jiangsu Province Scientific Supporting Project (BK20170046; and BE2015023).

Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation

Dongyan Li¹, Chen Gu², Feng Han², Zhaoxiang Zhong², Weihong Xing²

1. Department of Chemical Engineering and Materials, Nanjing Polytechnic Institute, Nanjing 210048, China;
2. State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

通讯作者: Zhaoxiang Zhong,E-mail addresses:zhongzx@njtech.edu.cn;Weihong Xing,E-mail addresses:xingwh@njtech.edu.cn.
基金资助:
Supported by the National Key R&D Program (2016YFC0204000), the National Natural Science Foundation of China (U1510202), and the Jiangsu Province Scientific Supporting Project (BK20170046; and BE2015023).

Abstract

Abstract: A novel Pt@ZnO nanorod/carbon fiber (NR/CF) with hierarchical structure was prepared by atomic layer deposition combined with hydrothermal synthesis and magnetron sputtering (MS). The morphology of Pt changes from nanoparticle to nanorod bundle with controlled thickness of Pt between 10 and 50 nm. Significantly, with the increase of voltage from 0 to 0.6 V (vs. standard calomel electrode), the prompt photocurrent generated on ZnO NR/CF increases from 0.235 to 0.725 mA. Besides, the Pt@ZnO NR/CF exhibited higher electrochemical active surface area (ECSA) value, better methanol oxidation ability and CO tolerance than Pt@CF, which demonstrated the importance of the multifunctional ZnO support. As the thickness of Pt increasing from 10 to 50 nm, the ECSA values were improved proportionally, leading to the improvement of methanol oxidation ability. More importantly, UV radiation increased the density of peak current of Pt@ZnO NR/CF towards methanol oxidation by additional 42.4%, which may be due to the synergy catalysis of UV light and electricity.

Key words: Carbon fibers, ZnO nanorods, Pt, Magnetron sputtering, Methanol electro-oxidation

摘要： A novel Pt@ZnO nanorod/carbon fiber (NR/CF) with hierarchical structure was prepared by atomic layer deposition combined with hydrothermal synthesis and magnetron sputtering (MS). The morphology of Pt changes from nanoparticle to nanorod bundle with controlled thickness of Pt between 10 and 50 nm. Significantly, with the increase of voltage from 0 to 0.6 V (vs. standard calomel electrode), the prompt photocurrent generated on ZnO NR/CF increases from 0.235 to 0.725 mA. Besides, the Pt@ZnO NR/CF exhibited higher electrochemical active surface area (ECSA) value, better methanol oxidation ability and CO tolerance than Pt@CF, which demonstrated the importance of the multifunctional ZnO support. As the thickness of Pt increasing from 10 to 50 nm, the ECSA values were improved proportionally, leading to the improvement of methanol oxidation ability. More importantly, UV radiation increased the density of peak current of Pt@ZnO NR/CF towards methanol oxidation by additional 42.4%, which may be due to the synergy catalysis of UV light and electricity.

关键词: Carbon fibers, ZnO nanorods, Pt, Magnetron sputtering, Methanol electro-oxidation

Dongyan Li, Chen Gu, Feng Han, Zhaoxiang Zhong, Weihong Xing. Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation[J]. Chin.J.Chem.Eng., 2017, 25(12): 1871-1876.

Dongyan Li, Chen Gu, Feng Han, Zhaoxiang Zhong, Weihong Xing. Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation[J]. Chinese Journal of Chemical Engineering, 2017, 25(12): 1871-1876.

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Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation

Catalytic performance of hybrid Pt@ZnO NRs on carbon fibers for methanol electro-oxidation

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