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Carbon-supported PtCo2Ni2 alloy with enhanced activity and stability for oxygen reduction

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Abstract

The commercialization of proton exchange membrane fuel cells (PEMFCs) is still restricted by the well-known dilemma, that is, the heavy dependence of using expensive plantinum (Pt) catalyst to negotiate the sluggish oxygen reduction reaction (ORR) kinetics in fuel cell cathodes. Here, a carbon-supported PtCo2Ni2 alloy catalyst with low Pt usage was synthesized via a simple method, which exhibited exceptional ORR activity with a more positive half-wave potential (E 1/2) ∼57 mV, which was more positive than the state-of-the-art Pt/C catalysts. Moreover, the alloy catalyst performs excellent durability after 10,000 harsh cycles compared with that of Pt/C catalyst in acidic solution, which may be developed as a promising alternative for Ptbased catalysts in fuel cell technology.

摘要

近年来, 质子交换膜燃料电池由于高成本严重阻碍了其商业化进程, 而目前催化阴极氧气还原反应最高效的催化剂仍然是昂贵的铂催化剂, 因此设计、 开发制备少铂、 高效、 稳定的催化剂是目前此领域研究的热点. 本论文利用一种简便的制备方法得到了碳负载的铂钴镍(摩尔比=1:2:2)三元合金纳米颗粒催化剂, 这种合金化催化剂在改变铂电子结构的同时, 大大降低了贵金属铂的用量. 电化学测试结果显示这种多元合金催化剂的半波电势与商业铂碳相比提高了约57 mV, 而且优于同体系制备的二元合金催化剂和其他组分三元合金催化剂. 此外, 在酸性电解质溶液中, 此催化剂表现出更优异的稳定性. 在燃料电池技术领域, 这种多元合金化催化剂很可能在将来发展成新电催化剂来替代铂材料.

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Correspondence to Shu-Hong Yu.

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These authors contributed equally to this work.

Ya-Rong Zheng received his BSc in Chemistry at Hefei University of Technology in 2010. He is currently a PhD candidate under the supervision of Prof. Shu-Hong Yu in the Department of Chemistry, University of Science and Technology of China (USTC). His current research interests include design and synthesis multicomponent alloy catalysts, transition metal chalcogenides, and their applications in fuel cell technology.

Min-Rui Gao received his BSc from Hefei University in 2006 and his PhD in Chemistry from the USTC under the supervision of Prof. Shu-Hong Yu in 2012. He did postdoctoral research at University of Delaware (2012–2014) and Argonne National Laboratory (2015). His main research interests focus on the design and synthesis of cheap and efficient materials for energy storage applications.

Shu-Hong Yu received his BSc at Hefei University of Technology and his PhD from the USTC. He was a postdoctoral fellow with M. Yoshimura (Tokyo Institute of Technology) and a Humboldt Fellow with M. Antonietti and H. Cölfen (MPI of Colloids and Interfaces, Germany). In 2002, he was appointed the Cheung Kong Professor at USTC. Currently, he leads the Division of Nanomaterials & Chemistry at the Hefei National Laboratory for Physical Sciences at Microscale, USTC. His current research interests include bio-inspired synthesis and self-assembly of new nanostructured materials and nanocomposites, and their related properties. He serves as an editorial advisory board member of journals Accounts of Chemical Research, Chemical Science, Materials Horizons, Chemistry of Materials, Nano Research, CrystEngComm, Particle Particle Systems Characterization, Current Nanoscience and SCIENCE CHINA Materials. His recent awards include Chem. Soc. Rev. Emerging Investigator Award (2010) and Roy-Somiya Medal of the International Solvothermal and Hydrothermal Association (ISHA) (2010).

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Zheng, YR., Gao, MR., Li, HH. et al. Carbon-supported PtCo2Ni2 alloy with enhanced activity and stability for oxygen reduction. Sci. China Mater. 58, 179–185 (2015). https://doi.org/10.1007/s40843-015-0034-5

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