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Title
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Cooperative alkaline hydrogen evolution via inducing local electric field and electron localization
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Type
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JournalPaper
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Keywords
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electron localization, hydrogen evolution reaction, Cu doped CoS2 nanoneedles
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Abstract
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Alkaline hydrogen evolution reaction (HER) represents a promising means to store intermittent renewable energy into clean energy. Unfortunately, the sluggish H2O dissociation and difficult *H adsorption-desorption are prominent obstacles to the development of alkaline HER. Herein, we developed a cooperative strategy via nanoneedle inducing local electric field and atomic doping causing electron localization for alkaline HER based on the preparation of Cu doped CoS2 nanoneedles (Cu-CoS2 NNs). Finite element method simulations and density functional theorycalculations demonstrate the local electric field accelerates H2O dissociation and electron localization facilitates *H adsorption, respectively. In situ attenuated total reflection infrared spectroscopy and electro-response measurement experimentally reveal the superior ability to H2O dissociation and *H adsorption for Cu-CoS2 NNs. As a result, the Cu-CoS2 NNs exhibit an ultralow overpotential of 64 mV at –10 mA cm−2 and long-term stability over 100 h at –100 mA cm−2 during alkaline HER, which outperforms most electrocatalysts in recently published works.
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Researchers
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Min Liu (Not In First Six Researchers), Jun Liu (Not In First Six Researchers), Yifa Sheng (Not In First Six Researchers), Wenzhang Li (Not In First Six Researchers), Shiguo Zhang (Not In First Six Researchers), Tao Luo (Not In First Six Researchers), Shanyong Chen (Not In First Six Researchers), Junwei Fu (Not In First Six Researchers), Kang Liu (Not In First Six Researchers), Chao Cai (Not In First Six Researchers), Hongmei Li (Not In First Six Researchers), Reza Abazari (Fifth Researcher), Xin Zi (Fourth Researcher), Yao Tan (Third Researcher), Yujie Gong (Second Researcher), Qiyou Wang (First Researcher)
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