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Han, Man Ho; Kim, Dongjin; Kim, Sangkuk; Yu, Seung‐Ho; Won, Da Hye; Min, Byoung Koun; Chae, Keun Hwa; Lee, Woong Hee; Oh, Hyung‐Suk
Advanced energy materials, 09/2022, Letnik: 12, Številka: 35Journal Article
N‐coordinated Ni single atom (Ni–NC) is one of the best catalysts for the CO2 reduction reaction (CO2RR) to produce CO. However, no bulk Ni materials have exhibited high catalytic activity for CO2RR. Herein, it is shown that NiS nanoparticles mimicking the electronic structure of Ni–NC in real‐time enhance the CO2RR activity in a zero‐gap electrolyzer. In situ/Operando X‐ray absorption spectroscopy suggests that under a cathodic potential, the electronic structure of NiS changes similarly to that of Ni–NC and modulated Ox–zSy ligands with similar properties to Ni ligands, resulting in a mimicked electronic structure. However, NiS exhibits low stability owing to the loss of S species, key to mimicking N ligands. The future challenges in finding a stable mimicked electronic structure are discussed. Moreover, this work provides new insights into the development of catalysts from materials that have not generally been considered previously. NiS exhibits enhanced catalytic activity for CO2 reduction in a zero‐gap electrolyzer. Operando X‐ray absorption spectroscopy suggests that NiS mimics single atom catalysts with the ideal electronic structure for CO2 reduction. It is expected that the NiS successfully mimics the electronic structure of NiNC due to its broken D4h symmetry and modulated Ox–zSy ligands under a cathodic potential.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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