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Nanoporous PdCu alloy for formic acid electro-oxidation
Open accessAbstract
In this work, nanoporous PdCu alloys (np-PdCu) with predetermined bimetallic ratios are fabricated by selectively dealloying PdCuAl ternary alloys in 1.0 M NaOH solution. Electron microscope and X-ray diffraction characterizations show that the nanoporous metals have three-dimensional bicontinuous ligament-pore structure with uniform ligament size. Electrochemical measurements demonstrate that np-PdCu has greatly enhanced electrocatalytic activity and structure stability towards formic acid oxidation (FAO) compared with nanoporous Pd (np-Pd). The surface specific activities of the nanoporous metals follow the order that np-Pd(50)Cu(50) > nP-Pd(75)Cu(25) > np-Pd(30)Cu(70) > np-Pd. The peak current density on np-Pd(50)Cu(50) shows the highest value, which is about six times of that on np-Pd. The alloy ratio also has a significant effect on the electrocatalytic behavior of the PdCu alloy towards FAO. When the Cu content is lower than 50 at.%, the FAO is mainly through the direct pathway; when the Cu content reaches 70 at.%, the FAO through the CO pathway increases. Moreover, electrochemical stripping experiment and continuous potential scan demonstrate that np-Pd(50)Cu(50) has a better resistance to CO poisoning and enhanced structure stability compared with other alloy samples. These results indicate the potential application of the np-Pd(50)Cu(50) in direct formic acid fuel cell. (C) 2011 Elsevier B.V. All rights reserved.
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Koh, S., & Strasser, P. (2007) · Journal of the American Chemical Society · doi:10.1021/ja0742784 · Cited by 783
Mani, P., Srivastava, R., & Strasser, P. (2011) · Journal of Power Sources · doi:10.1016/j.jpowsour.2010.07.047 · Cited by 379
Bimetallic and Ternary Alloys for Improved Oxygen Reduction Catalysis
Nilekar, A. U., Xu, Y., Zhang, J., Vukmirovic, M. B., Sasaki, K., Adzic, R. R., & Mavrikakis, M. (2007) · Topics in Catalysis · doi:10.1007/s11244-007-9001-z · Cited by 216
Cited by
Zhu, C., Du, D., Eychmüller, A., & Lin, Y. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00255 · Cited by 672
Zhang, J., & Li, C. M. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35210a · Cited by 527
Metadata
- Authors
- Xu, C., Liu, Y., Wang, J., Geng, H., & Qiu, H.
- Venue
- Journal of Power Sources
- Publisher
- Elsevier BV
- Published
- 2012-02
- Volume
- 199
- Pages
- 124-131
- ISSN
- 0378-7753 (ISSN-L)
- OpenAlex
- W2013625230
- Cited by
- 193
- References
- 3
- FWCI
- 7.22
- Type
- journal article
- Language
- en
- Open access
- green
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