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A General Route to Prepare Low-Ruthenium-Content Bimetallic Electrocatalysts for pH-Universal Hydrogen Evolution Reaction by Using Carbon Quantum Dots |
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| Authors: | Yuan Liu Xue Li Dr Qinghua Zhang Weidong Li Prof Yu Xie Prof Hanyu Liu Dr Lu Shang Prof Zhongyi Liu Prof Zhimin Chen Prof Lin Gu Prof Zhiyong Tang Prof Tierui Zhang Prof Siyu Lu |
| Institution: | 1. College of Chemistry, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450000 China
These authors contributed equally to this work.;2. College of Physics, Jilin University, Jilin, 130012 China These authors contributed equally to this work.;3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China These authors contributed equally to this work.;4. College of Chemistry, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450000 China;5. College of Physics, Jilin University, Jilin, 130012 China;6. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 China;7. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China;8. Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450000 China |
| Abstract: | A challenging but pressing task to design and synthesize novel, efficient, and robust pH-universal hydrogen evolution reaction (HER) electrocatalysts for scalable and sustainable hydrogen production through electrochemical water splitting. Herein, we report a facile method to prepare an efficient and robust Ru-M (M=Ni, Mn, Cu) bimetal nanoparticle and carbon quantum dot hybrid (RuM/CQDs) for pH-universal HER. The RuNi/CQDs catalysts exhibit outstanding HER performance at all pH levels. The unexpected low overpotentials of 13, 58, and 18 mV shown by RuNi/CQDs allow a current density of 10 mA cm?2 in 1 m KOH, 0.5 m H2SO4, and 1 m PBS, respectively, for Ru loading at 5.93 μgRu cm?2. This performance is among the best catalytic activities reported for any platinum-free electrocatalyst. Theoretical studies reveal that Ni doping results in a moderate weakening of the hydrogen bonding energy of nearby surface Ru atoms, which plays a critical role in improving the HER activity. |
| Keywords: | Kohlenstoff-Quantenpunkte pH-Universalität Ruthenium Übergangsmetalldotierung Wasserstoffentwicklungsreaktion |