Sulfur‐Stabilized Superfine Pt Clusters Synergized with Single‐Atom Ni‐N <sub>4</sub> Sites for Hydrazine Oxidation‐Assisted Hydrogen Production
Abstract
Abstract Hydrazine oxidation‐assisted hydrogen evolution represents a promising avenue for energy‐saving hydrogen production. However, the development of bifunctional catalysts with high atom economy and durability for both hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) remains challenging. Here, a design is reported that combines sulfur‐stabilized Pt clusters and Ni‐N 4 sites on nitrogen‐doped carbon support (Pt n ‐S/Ni 1 ‐NC) for boosting alkaline hydrazine oxidation‐assisted hydrogen evolution. Experimental and theoretical results reveal that the pre‐coordinated sulfur atoms on Pt clusters provide strong metal‐support interaction (SMSI) for the homogeneous distribution of Pt clusters, allowing Pt clusters to remain ultrafine, which ensures high atom utilization and sufficient active sites. Moreover, the electronic interactions and synergistic adsorption mechanism of Pt clusters and adjacent Ni‐N 4 sites markedly accelerate the H 2 O dissociation and HzOR kinetics. As a result, the Pt n ‐S/Ni 1 ‐NC catalysts exhibit exceptional catalytic activity, achieving an ultrasmall HER overpotential of 19 mV and an ultralow HzOR working potential of −21 mV at 10 mA cm −2 current density. In addition, the overall hydrazine oxidation‐assisted splitting (OHzS) electrolyzer can reach 10 mA cm −2 with a low cell voltage of 79 mV and good long‐term stability in 1.0 m KOH/0.5 m N 2 H 4 .
Article Details
Authors (6)
Ya‐Kun Lv
Henan Key Laboratory of Crystalline Molecular Functional Materials and College of Chemistry Zhengzhou University Zhengzhou 450000 China
Kun Wang
Beijing National Laboratory for Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering
Chen‐Xia Du
Henan Key Laboratory of Crystalline Molecular Functional Materials and College of Chemistry Zhengzhou University Zhengzhou 450000 China
Ren‐Wu Huang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education College of Chemistry Zhengzhou University Zhengzhou P. R. China
Shuang‐Quan Zang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China
Peng Peng