To tune the activity of Pt alloy electrocatalysts and reduce the Pt loading, researchers have intensively studied alloys of Pt with late transition metals. However, Pt alloy formation with rare-earth (RE) elements through the traditional chemical route is still a challenge due to the vastly different standard reduction potentials. Here, we report a universal chemical method to prepare a series of Pt/RE (RE = La, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Lu) nanoalloys with tunable compositions and ultrasmall particle sizes (sub-2 nm). These Pt-RE nanoalloys were synthesized by a strong liquid metal reduction with high-speed shearing assistance at room temperature. Among the nine Pt-RE alloy catalysts, the PtNd/C shows the best hydrogen evolution reaction (HER) activity, stability, and durability compared to commercial Pt/C. The PtNd/C shows an overpotential of 25.9 mV at the current density of 10 mA/cm with a Tafel slope of 19.5 mV/dec and excellent stability in the acidic medium. This work not only provides a general and scalable strategy for synthesizing noble metal-RE alloys but also highlights noble metal-RE alloys as sufficiently advanced catalysts and accelerates the research of noble metal-RE alloy in energy-related applications.
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http://dx.doi.org/10.1021/acs.inorgchem.2c01502 | DOI Listing |
Nat Commun
July 2024
Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Binhai Road No.72, 266237, Qingdao, China.
The process of CH cracking into H and carbon has gained wide attention for hydrogen production. However, traditional catalysis methods suffer rapid deactivation due to severe carbon deposition. In this study, we discover that effective CH cracking can be achieved at 450 °C over a Re/Ni single-atom alloy via ball milling.
View Article and Find Full Text PDFInorg Chem
August 2022
Institute of Materials for Energy and Environment, School of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
Nanoscale
November 2020
Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
One-atom-thick rare-earth/noble metal (RE-NM) compounds are attractive materials to investigate two-dimensional magnetism, since they are easy to synthesize into a common RE-NM2 structure with high crystal perfection. Here we perform a comparative study of the GdAu2, HoAu2, and YbAu2 monolayer compounds grown on Au(111). We find the same atomic lattice quality and moiré superlattice periodicity in the three cases, but different electronic properties and magnetism.
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