Preparation and Electrochemical Properties of Honeycomb-like Pt-Ni-P/Ti Electrode for Methanol Oxidation
Received date: 2016-09-01
Revised date: 2016-12-19
Online published: 2016-12-20
Supported by
Project supported by the National Natural Science Foundation of China (Nos. 21376283 and 21376284).
A honeycomb-like metallic catalyst (Pt-Ni-P/Ti) supported on a Ti sheet was prepared by electrodeposition-displacement method. The Ni-P amorphous alloy was first electrodeposited on the Ti substrate, and then replaced by displacement of Ni in amorphous Ni-P with H2PtCl6. The morphology and methanol oxidation performance of the prepared catalyst were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), anodic linear sweep voltammetry (LSV), cyclic voltammetry (CV), and the anodic stripping of a pre-adsorbed CO monolayer. The SEM results show that the Pt-Ni-P nanoparticles obtained by displacement of Ni in amorphous Ni-P with H2PtCl6 had a honeycomb-like porous structure, while the Pt-Ni nanoparticles had a wheat-like structure. The formation of the honeycomb-like porous structure can be explained by the so-called "out-situ dissolution-deposition mechanism", in which the metallic Ni in Ni-P/Ti electrode preferentially dissolve to form pore structure and release electron. The released electrons can be captured by the PtCl62- ion adsorbed on the surface of Ni-P and reduced on the surface of Ni-P to form Pt shell, thereby forming a honeycomb-like pore structure. For the Pt-Ni/Ti electrode, the formation of wheat-like structure Pt-Ni nanoparticles can be explained by a so-called "in-situ dissolution-deposition mechanism", in which the Pt replacement reaction can only occur at the surface of Ni, and the replacement Pt monolayer can prevent the further chemical substitution of Pt on Ni, thereby forming a wheat-like structure. The electrochemical test results show that the methanol oxidation and CO oxidation onset potential on Pt-Ni-P/Ti electrode in alkaline solution is more negative than that on Pt-Ni/Ti electrode, indicating that P incorporation can significantly enhance the methanol oxidation activity and CO-tolerance. Moreover, the unique honeycomb-like porous structure is beneficial to the fast mass transportation during the catalytic reaction. The combination of compositionally and geometrically favorable factors provides a new avenue to design new electrocatalysts with excellent methanol oxidation activity and CO-tolerance.
Tao Xiongxin , Li Li , Qi Xueqiang , Wei Zidong . Preparation and Electrochemical Properties of Honeycomb-like Pt-Ni-P/Ti Electrode for Methanol Oxidation[J]. Acta Chimica Sinica, 2017 , 75(2) : 237 -240 . DOI: 10.6023/A16090460
[1] Wang, L.; Nemoto, Y.; Yamauchi, Y. J. Am. Chem. Soc. 2011, 133, 9674.
[2] Yang, L. L.; Sun, H.; Wang, S. L.; Jiang, L. H.; Sun. G. Q. J. Power Sources 2012, 219, 193.
[3] Zhou, Z. Y.; Huang, Z. Z.; Chen, D. J.; Wang, Q.; Tian, N.; Sun, S. G. Angew. Chem., Int. Ed. 2010, 49, 411.
[4] Li, L. L.; Wei, Z. D.; Li, L.; Sun, C. X. Acta Chim. Sinica 2006, 64, 1173. (李兰兰, 魏子栋, 李莉, 孙才新, 化学学报, 2006, 64, 1173.)
[5] Shimizu, T.; Momma, T.; Mohamedi, M.; Osaka, T.; Sarangapani, S. J. Power Sources 2004, 117, 277.
[6] Wang, J. S.; Wang, L. C.; Zhao, J. H.; Song, C. Y.; Qiu, X. P.; Chen, L. Q. Acta Chim. Sinica 2009, 67, 361. (王建设, 王留成, 赵建宏, 宋成盈, 邱新平, 陈立泉, 化学学报, 2009, 67, 361.)
[7] Kerres, J. A. J. Membr. Sci. 2001, 185, 3.
[8] Schaffer, T.; Hacker, V.; Hejze, T.; Tschinder, T.; Besenhard, J. O. J. Power Sources 2005, 145, 188.
[9] Chu, D. B.; Feng, D. X.; Zhang, J. H.; Lin, H. S.; Hu, W. L.; Tian, Z. W. Acta Chim. Sinica 2005, 63, 2027. (褚道葆, 冯德香, 张金花, 林华水, 胡维玲, 田昭武, 化学学报, 2005, 63, 2027.)
[10] Shobba, T.; Mayanna, S. M.; Sequeira, C. A. C. J. Power Sources 2002, 108, 261.
[11] Nie, M.; Tang, H. L.; Wei, Z. D.; Jiang, S. P.; Shen, P. K. Electrochem. Commun. 2007, 9, 2375.
[12] Lv, Y. Z.; Xu, Y.; Lu, T. H.; Xing, W.; Zhang, M. L. Acta Chim. Sinica 2007, 65, 1583. (吕艳卓, 徐岩, 陆天虹, 邢巍, 张密林, 化学学报, 2007, 65, 1583.)
[13] Zhang, J. T.; Liu, P. P.; Ma, H. Y.; Ding, Y. J. J. Phys. Chem. C 2007, 111, 10382.
[14] Abdel Rahim, M. A.; Abdel Hameed, R. M.; Khalil, M. W. J. Power Sources 2004, 135, 42.
[15] Smith, G. V.; Brower, W. E.; Matyjaszczyk, M. S. Proceedings of the Seventh International Congress on Catalysis, Eds.:Seiyana, T.; Tanabe, K., Elsevier, New York, 1981, p. 355.
[16] Chang, J. F.; Feng, L. G.; Liu, C. P.; Xing, W.; Hu, X. L. Energy Environ. Sci. 2014, 7, 1628.
[17] Xue, X.; Ge, J.; Tian, T.; Liu, C.; Xing, W.; Lu, T. J. J. Power Sources 2007, 172, 560.
[18] Chen, S. G.; Xu, Y.; Wei, Z. D.; Li, L.; Qi, X. Q.; Guo, L.; Ding, W.; Xia, M. R. Recent Patents on Corrosion Science 2012, 2, 42.
[19] Ding, L. X.; Wang, A. L.; Li, G. R.; Liu, Z. Q.; Zhao, W. X.; Su, C. Y.; Tong, Y. X. J. Am. Chem. Soc. 2012, 134, 5730.
[20] Liu, Y.; Wei, Z. D.; Chen, S. G.; Feng, Y. C.; Yin, G. Z.; Sun, C. X. Acta Phys.-Chim. Sinica 2007, 23, 521. (刘勇, 魏子栋, 陈四国, 冯永超, 尹光志, 孙才新, 物理化学学报, 2007, 23, 521.)
[21] Wei, Z. D.; Yan, A. Z.; Feng, Y. C.; Li, L.; Sun, C. X.; Shao, Z. G.; Shen, P. K. Electrochem. Commun. 2007, 9, 2709.
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