title: Enhanced Activity for Hydrogen Evolution Reaction over CoFe Catalysts by Alloying with Small Amount of Pt.
abstract: The hydrogen evolution reaction highly relied on Pt electrocatalysts, with high activity and stability. In the past few years, a host of efforts have been made in the development of novel platinum nanostructures with a low amount of Pt because the scarcity and high price of Pt hinder its practical applications. Here, we report the preparation of PtCoFe@CN electrocatalysts with a remarkably reduced Pt loading amount of 4.60% by annealing Pt-doped metal-organic frameworks (MOFs). The electrocatalyst demonstrated an outstanding performance with only 45 mV overpotential to achieve the 10 mA cm-2current density, which is quite close to that of the commercial 20% Pt/C catalyst. The enhanced catalytic capability is originated from the modification of the electronic structures of CoFe by alloying with Pt. The results indicate that robust and superstable alloy electrocatalysts which contain a very small amount of noble metal could be prepared by annealing noble metal-doped MOFs.
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.|School of Chemistry and Materials Engineering, Fuyang Normal University , Fuyang 236041, China.
authors.forename: Jitang
authors.identifier: http://orcid.org/0000-0002-1607-7075
authors.initials: J
authors.lastname: Chen
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.
authors.forename: Yang
authors.identifier: http://orcid.org/0000-0002-1516-0627
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Su
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.
authors.forename: Guoliang
authors.initials: G
authors.lastname: Xia
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, China.|High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China.
authors.forename: Qianwang
authors.initials: Q
authors.lastname: Chen
keywords: alloy; hydrogen generation; metal−organic framewok; synergistic effect; trimetallic