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https://doi.org/10.1039/d1nh00661d
Title: | Heterostructured Bi-Cu2S nanocrystals for efficient CO2 electroreduction to formate | Authors: | Han, Xue Mou, Tianyou Liu, Shikai Ji, Mengxia Gao, Qiang He, Qian Xin, Hongliang Zhu, Huiyuan |
Keywords: | Science & Technology Physical Sciences Technology Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science ELECTROCHEMICAL REDUCTION CARBON-DIOXIDE NANOPARTICLES OXIDATION DESIGN |
Issue Date: | 15-Feb-2022 | Publisher: | ROYAL SOC CHEMISTRY | Citation: | Han, Xue, Mou, Tianyou, Liu, Shikai, Ji, Mengxia, Gao, Qiang, He, Qian, Xin, Hongliang, Zhu, Huiyuan (2022-02-15). Heterostructured Bi-Cu2S nanocrystals for efficient CO2 electroreduction to formate. NANOSCALE HORIZONS. ScholarBank@NUS Repository. https://doi.org/10.1039/d1nh00661d | Abstract: | The electrochemical CO2 reduction reaction (ECO2RR) driven by renewable electricity holds promise to store intermittent energy in chemical bonds, while producing value-added chemicals and fuels sustainably. Unfortunately, it remains a grand challenge to simultaneously achieve a high faradaic efficiency (FE), a low overpotential, and a high current density of the ECO2RR. Herein, we report the synthesis of heterostructured Bi-Cu2S nanocrystals via a one-pot solution-phase method. The epitaxial growth of Cu2S on Bi leads to abundant interfacial sites and the resultant heterostructured Bi-Cu2S nanocrystals enable highly efficient ECO2RR with a largely reduced overpotential (240 mV lower than that of Bi), a near-unity FE (>98%) for formate production, and a high partial current density (2.4- and 5.2-fold higher JHCOO- than Cu2S and Bi at -1.0 V vs. reversible hydrogen electrode, RHE). Density functional theory (DFT) calculations show that the electron transfer from Bi to Cu2S at the interface leads to the preferential stabilization of the formate-evolution intermediate (*OCHO). | Source Title: | NANOSCALE HORIZONS | URI: | https://scholarbank.nus.edu.sg/handle/10635/224636 | ISSN: | 20556756 | DOI: | 10.1039/d1nh00661d |
Appears in Collections: | Staff Publications Elements Students Publications |
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