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      Highly efficient hydrogen evolution from seawater by a low-cost and stable CoMoP@C electrocatalyst superior to Pt/C

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          Abstract

          A low-cost CoMoP@C electrocatalyst exhibits high efficiency and stable HER performance superior to commercial 20% Pt/C, and can directly work in seawater for the HER with a Faradaic efficiency of 92.5%.

          Abstract

          The hydrogen evolution reaction (HER) based on water electrolysis is a promising strategy for hydrogen energy production, in which the key point is seeking low-cost, high efficiency and stable electrocatalysts. Currently, the most efficient electrocatalysts for the HER are Pt-based catalysts (especially commercial Pt/C), but the low abundance and high cost of Pt hinder their widespread application. Herein, we demonstrate that a cobalt molybdenum phosphide nanocrystal coated by a few-layer N-doped carbon shell (CoMoP@C) is an excellent substitute for the HER. CoMoP@C is prepared by a one-step pyrolysis method on a large scale with polyoxometalate (POM) as a molecular platform. The catalytic activity of CoMoP@C is close to that of commercial 20% Pt/C under pH = 0–1 conditions and superior to that of 20% Pt/C under pH = 2–14 conditions at high overpotential ( e.g. η > 240 mV at pH = 2.2). In real seawater, CoMoP@C exhibits stable HER performance with a high Faradaic efficiency (FE) of 92.5%, while the HER activity of 20% Pt/C dramatically decreases after 4 h. The remarkable HER performance of CoMoP@C should be attributed to the low free energy of H on the central CoMoP crystalline core and the multiple functions of the outer N-doped C shell (especially the strong H + absorption behavior). This work may provide new options for the design and preparation of promising HER electrocatalysts superior to Pt/C, which can be used directly in seawater.

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          Alternative energy technologies.

          Fossil fuels currently supply most of the world's energy needs, and however unacceptable their long-term consequences, the supplies are likely to remain adequate for the next few generations. Scientists and policy makers must make use of this period of grace to assess alternative sources of energy and determine what is scientifically possible, environmentally acceptable and technologically promising.
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            Ni2P as a Janus catalyst for water splitting: the oxygen evolution activity of Ni2P nanoparticles

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              Advancing the Electrochemistry of the Hydrogen-Evolution Reaction through Combining Experiment and Theory

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                Author and article information

                Journal
                EESNBY
                Energy & Environmental Science
                Energy Environ. Sci.
                Royal Society of Chemistry (RSC)
                1754-5692
                1754-5706
                2017
                2017
                : 10
                : 3
                : 788-798
                Affiliations
                [1 ]Key Laboratory of Polyoxometalate Science of the Ministry of Education
                [2 ]Faculty of Chemistry
                [3 ]Northeast Normal University
                [4 ]Changchun
                [5 ]China
                [6 ]Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices
                [7 ]Institute of Functional Nano and Soft Materials (FUNSOM)
                [8 ]Soochow University
                [9 ]Suzhou 215123
                Article
                10.1039/C6EE03768B
                a3bd2db4-5289-42ee-b943-e773c99ce31a
                © 2017
                History

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