Shao-Chen Wang, Xiang Ji, Rui Hou, Longlong Qi, Peng Jing, Xuan Xu, Baocang Liu, Jun Zhang
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引用次数: 0
Abstract
Accelerating the conversion of *CO to *CHO and promoting the adsorption and hydrogenation of *CHO are the keys to achieving a highly selective electrocatalytic CO2 reduction reaction (CO2RR) to CH4 over Cu-based catalysts. Herein, a novel electrocatalyst comprising highly dispersed Cu nanoclusters (CuNCs) supported on oxygen vacancy (OV)-rich CeO2 on carbon paper (CuNCs–CeO2/CP) with plentiful interfacial Cu+–O–Ce3+–OV sites is constructed via a facile electrodeposition method. Various in situ/ex situ characterizations and theoretical calculations unveil that the Cu+–O–Ce3+–OV sites can effectively regulate the pathway of the CO2RR, accelerate the *CO → *CHO process, stabilize the *CHO and *OCH3 intermediates, and promote their hydrogenation to produce CH4. Furthermore, the critical role of Ce3+ and the OV species in forming Cu+–O–Ce3+–OV to maintain the electrocatalytic CO2RR activity is revealed. The optimized CuNCs–CeO2/CP electrocatalyst exhibits a CH4 Faradaic efficiency of 68.3% at 500 mA cm–2, with a high partial current density of 340 mA cm–2.
期刊介绍:
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.