Hu, Yuhan; Wu, Haihua; Yang, Yaoyue; Lin, Xiaoman; Cheng, Hailian; Zhang, Rui; Jiang, Xiaole
ZIF-8 derived porous ZnO with grain boundaries for efficient CO.sub.2 electroreduction
Teil von
  • Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2021-06-01, Vol.23 (6)
Ort / Verlag
Links zum Volltext
Springer Online Journals Complete
Keywords: Metal-organic frameworks; Zinc oxide; Grain boundaries; CO.sub.2; Electrocatalytic reduction; Nanostructures Electrocatalytic CO.sub.2 reduction reaction has been considered as a promising route to realize carbon cyclic utilization and renewable energy storage. Recently, Zn-based catalysts have attracted much attention due to their earth-abundant reserve and low cost, which can meet the demand for commercial applications at a large scale. Herein, ZnO catalyst (ZIF-8-D-ZnO) was synthesized by pyrolysis of ZIF-8 precursor for electrocatalytic reduction of CO.sub.2. The ZIF-8-D-ZnO catalyst exhibits an excellent catalytic activity for CO production than rod-like ZnO and Zn foil catalysts, with faradaic efficiency of 86.7 % and geometric current density of 16.1 mA cm.sup.-2 at -1.2 V (vs. RHE). Moreover, the overpotential over ZIF-8-D-ZnO is much lower than that of analogous catalysts. The results suggest that the grain boundaries within the porous structure facilitate CO.sub.2 electroreduction over ZIF-8-D-ZnO due to the introduction of new catalytically active sites. This work provides experimental evidence for the design of efficient Zn-based materials for CO.sub.2 electrocatalytic reduction. Graphical abstract ZIF-8-D-ZnO catalyst with porous structure and grain boundaries exhibits much higher CO faradaic efficiency and current density than ZnO-R and Zn foil catalysts. Author Affiliation: (1) Key Laboratory of Fundamental Chemistry of the State Ethnic Commission, School of Chemistry and Environment, Southwest Minzu University, Sichuan Province, 610041, Chengdu, China (2) State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Zhejiang Province, 310014, Hangzhou, China (3) Department of Physics and Information Engineering, Jining University, Shandong Province, 273155, Qufu, China (g) (h) Article History: Registration Date: 06/17/2021 Received Date: 01/22/2021 Accepted Date: 06/16/2021 Online Date: 06/24/2021 Byline:
ISSN: 1388-0764
ISSN: 1572-896X
DOI: 10.1007/s11051-021-05271-9
Links zum Inhalt
Alternative energy sources, Chemical synthesis, Grain boundaries, Pyrolysis, Zinc oxide

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