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Ordered‐Mesoporous‐Carbon‐Confined Pb/PbO Composites: Superior Electrocatalysts for CO 2 Reduction
Author(s) -
Huang Xin,
Song Jinliang,
Wu Haoran,
Xie Chao,
Hua Manli,
Hu Yue,
Han Buxing
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202000329
Subject(s) - calcination , materials science , electrochemistry , mesoporous material , carbon fibers , molar ratio , catalysis , selectivity , metal , chemical engineering , faraday efficiency , inorganic chemistry , chemistry , electrode , composite material , metallurgy , organic chemistry , composite number , engineering
CO 2 electroreduction has gained significant interest. However, fabricating cost‐effective nonprecious‐metal electrocatalysts that can selectively convert CO 2 to a specific product remains highly challenging. Herein, Pb‐based materials consisting of Pb 0 and PbO confined in ordered mesoporous carbon (OMC) (Pb/PbO@OMC) were constructed for CO 2 electroreduction to CO. Interestingly, the activity and selectivity of the Pb/PbO@OMC varied with the molar ratio of Pb 0 /PbO. The material calcined at 800 °C (Pb/PbO@OMC‐800) with a Pb 0 /PbO ratio of 0.58 provided the best result with CO as the only carbon‐based product, and the Faradaic efficiency of CO reached 98.3 % at a high current density of 41.3 mA cm −2 . Detailed studies indicated that Pb 0 , PbO, and OMC co‐operated well to enhance the performance of Pb/PbO@OMC‐800, which mainly originated from the good interface between Pb 0 and PbO, higher electrochemical active surface area, and faster electron transfer to form the CO 2 ⋅− intermediate.