Abstract
Forming alloys with transition metal remarkably decreases the u sage of noble metal and offers benefits for electrocatalysis. Here we introduced a mixed-solvent strategy to synthesize unique PtAuCu ternary nanotubes (NTs) with porous and rough surface, using high quality Cu nanowires (NWs) as the partial sacrificial templates. We found that Au plays a key role in the enhancement of e lectrocatalytic performance for both methanol oxidation reaction (MOR) and formic acid oxidation reaction (FAOR). The mass activities of PtAuCu NTs after acid leaching for MOR and FAOR reach 1698.8 mA mg −1Pt at 0.9 V and 1170 mA mg −1Pt at 0.65 V, respectively. Such ternary NTs show impressive stability due to the irreversibly adsorption of CO* on the Au surface instead of the active Pt surface and the excellent structure stability. The present method could be extended to prepare other new multi-functional electrocatalysts.
摘要
与非贵金属形成合金是一种能大幅减少电催化剂中贵金属用量的有效方法, 且形成合金有利于催化性能提升. 本文引入了一种混合溶剂体系, 通过采用高质量铜纳米线作为部分牺牲模板合成了多孔均一, 表面粗糙的PtAuCu三元纳米管. 实验表明金的引入是催化剂甲醇氧化(MOR)和甲酸氧化(FAOR)性能提升的一个关键因素. 其MOR和FAOR质量活性分别达到了1698.8 mA mg −1Pt (0.9V)和1170 mA mg −1Pt (0.65V). 由于CO*不可逆的吸附在金的表面而非有催化活性的铂表面, 这种三元纳米管催化剂表现出了优异的催化稳定性和结构稳定性. 此外, 这种合成方法可以用于合成其他的新型双功能催化剂.
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Qi-Qi Fu received his BSc degree majored in chemistry from Lanzhou University, China in 2013. Then he joined the University of Science and Technology of China (USTC) and conducted research under the supervision of Prof. Shu- Hong Yu. His research interest is the synthesis of one-dimensional noble metal alloys as efficient electrochemical catalysts.
Hui-Hui Li received her PhD degree from the USTC in 2014. Currently, she is a post-doctor in Prof. Shu-Hong Yu’s group at the USTC. Her research interests include design and synthesis of one-dimensional electrocatalysts. She developed a simple and effective partial sacrificial template method to prepare one-dimensional multi-metallic Pt-based alloy catalysts.
Shu-Hong Yu received his BSc degree at Hefei University of Technology and PhD degree 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 the USTC. Currently, he leads the Division of Nanomaterials & Chemistry at 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, Chemistry of Materials, Chemical Science, Materials Horizons, Nano Research, ChemNanoMat, ChemPlusChem, CrystEngComm, Part. Part. Syst. Charact. and Current Nanoscience. 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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Fu, QQ., Li, HH., Ma, SY. et al. A mixed-solvent route to unique PtAuCu ternary nanotubes templated from Cu nanowires as efficient dual electrocatalysts. Sci. China Mater. 59, 112–121 (2016). https://doi.org/10.1007/s40843-016-0123-0
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DOI: https://doi.org/10.1007/s40843-016-0123-0