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Partially Oxidized Palladium Nanodots for Enhanced Electrocatalytic Carbon Dioxide Reduction
Author(s) -
Lu Hui,
Zhang Le,
Zhong Ju Hua,
Yang Hua Gui
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800946
Subject(s) - palladium , electrocatalyst , catalysis , nanodot , carbon monoxide , electrochemical reduction of carbon dioxide , reversible hydrogen electrode , carbon dioxide , inorganic chemistry , aqueous solution , chemistry , adsorption , faraday efficiency , materials science , electrode , electrochemistry , nanotechnology , working electrode , organic chemistry
Here we report a partially oxidized palladium nanodot (Pd/PdO x ) catalyst with a diameter of around 4.5 nm. In aqueous CO 2 ‐saturated 0.5 m KHCO 3 , the catalyst displays a Faradaic efficiency (FE) of 90 % at −0.55 V vs. reversible hydrogen electrode (RHE) for carbon monoxide (CO) production, and the activity can be retained for at least 24 h. The improved catalytic activity can be attributed to the strong adsorption of CO 2 .− intermediate on the Pd/PdO x electrode, wherein the presence of Pd 2+ during the electroreduction reaction of CO 2 may play an important role in accelerating the carbon dioxide reduction reaction (CO 2 RR). This study explores the catalytic mechanism of a partially oxidized nanostructured Pd electrocatalyst and provides new opportunities for improving the CO 2 RR performance of metal systems.