2D DUT-8(Ni)-derived Ni@C nanosheets for efficient hydrogen evolution
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ORIGINAL PAPER
2D DUT-8(Ni)-derived Ni@C nanosheets for efficient hydrogen evolution Qingtao Wang 1
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& Rong Yang & Jian Li & Yaoxia Yang & Yanxia Wu & Xiaozhong Zhou & Guofu Ma & Shufang Ren
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Received: 8 January 2020 / Revised: 2 June 2020 / Accepted: 24 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The development of high-performance, low-cost, and high-stability catalysts for electrocatalytic hydrogen evolution reaction is a key step in the green and sustainable production of hydrogen energy. Herein, we prepared 2D Ni@C nanosheets by hightemperature carbonization of 2D MOFs DUT-8(Ni). It was used as a highly efficient hydrogen evolution catalyst in alkaline solution. We compared the properties of the composites obtained at different carbonization temperatures. It was found that the DUT-8(Ni) was not completely decomposed at low temperatures, and the Ni NPs had lower crystallinity, so the composites show poor electrocatalytic performance. With the increase of carbonization temperature, DUT-8(Ni) was completely decomposed, and the crystallinity of Ni NPs gradually increased, and the electrocatalytic performance gradually improves. However, when the temperature was 800 °C, the electrochemical surface area of the composite reduced, the electrocatalytic performance decreased slightly. The Ni NPs were uniformly embedded on the 2D carbon nanosheets. The carbon nanosheets matrix provides good electrical conductivity. At the same time, the Ni NPs coated the thin graphite carbon layer can effectively prevent particle agglomeration. This method provides an idea for the preparation of 2D high-performance electrocatalysts. Keywords Nanocomposites . 2D . Hydrogen evolution reaction . Electrocatalysis . MOFs
Introduction With the rapid development of society, the energy crisis and environmental pollution problems have become more and
more serious [1, 2]. Clean energy such as wind energy, solar energy, and hydrogen energy has received wide attention. Hydrogen is currently considered to be one of the ideal renewable clean energy sources that do not produce harmful by-
Highlights 1. The 2D Ni@C nanosheets were prepared by pyrolysis of 2D MOFs of DUT-8(Ni). 2. Ni NPs are embedded in the 2D carbon nanosheets, which provide good conductivity. 3. Graphite carbon on the surface of Ni NPs can prevent the agglomeration of it. 4. The 2D Ni@C nanosheets have good electrocatalytic hydrogen evolution performance. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10008-020-04743-7) contains supplementary material, which is available to authorized users. * Qingtao Wang [email protected]
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Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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Key Laboratory of Evidence Science Research and Application of Gansu Province, Gansu University of Political Science and Law, Lanzhou 730070, Chin
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