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    High Electrocatalytic Hydrogen Evolution Activity of an Anomalous Ruthenium Catalyst

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    Type
    Article
    Authors
    Zheng, Yao
    Jiao, Yan cc
    Zhu, Yihan
    Li, Lu Hua
    Han, Yu cc
    Chen, Ying cc
    Jaroniec, Mietek
    Qiao, Shi-Zhang cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Imaging and Characterization Core Lab
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2016-12-06
    Online Publication Date
    2016-12-06
    Print Publication Date
    2016-12-14
    Permanent link to this record
    http://hdl.handle.net/10754/622635
    
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    Abstract
    Hydrogen evolution reaction (HER) is a critical process due to its fundamental role in electrocatalysis. Practically, the development of high-performance electrocatalysts for HER in alkaline media is of great importance for the conversion of renewable energy to hydrogen fuel via photoelectrochemical water splitting. However, both mechanistic exploration and materials development for HER under alkaline conditions are very limited. Precious Pt metal, which still serves as the state-of-the-art catalyst for HER, is unable to guarantee a sustainable hydrogen supply. Here we report an anomalously structured Ru catalyst that shows 2.5 times higher hydrogen generation rate than Pt and is among the most active HER electrocatalysts yet reported in alkaline solutions. The identification of new face-centered cubic crystallographic structure of Ru nanoparticles was investigated by high-resolution transmission electron microscopy imaging, and its formation mechanism was revealed by spectroscopic characterization and theoretical analysis. For the first time, it is found that the Ru nanocatalyst showed a pronounced effect of the crystal structure on the electrocatalytic activity tested under different conditions. The combination of electrochemical reaction rate measurements and density functional theory computation shows that the high activity of anomalous Ru catalyst in alkaline solution originates from its suitable adsorption energies to some key reaction intermediates and reaction kinetics in the HER process.
    Citation
    Zheng Y, Jiao Y, Zhu Y, Li LH, Han Y, et al. (2016) High Electrocatalytic Hydrogen Evolution Activity of an Anomalous Ruthenium Catalyst. Journal of the American Chemical Society 138: 16174–16181. Available: http://dx.doi.org/10.1021/jacs.6b11291.
    Sponsors
    The authors gratefully acknowledge financial support by the Australian Research Council (ARC) through the Discovery Project programs (DP160104866, DP140104062, DP130104459, and DE160101163). NEXAFS measurements were performed on the soft X-ray beamline at Australian Synchrotron. DFT calculations were carried out using the NCI National Facility systems through the National Computational Merit Allocation Scheme.
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/jacs.6b11291
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/jacs.6b11291
    ae974a485f413a2113503eed53cd6c53
    10.1021/jacs.6b11291
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program

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