Synthesis and Characterization of (Cu, S) Co‐doped SnO2 for Electrocatalytic Reduction of CO2 to Formate at Low Overpotential
Xueyan Hu; Huimin Yang; Minmin Guo; Mengting Gao; Erhui Zhang; Haoyang Tian; Zhenhai Liang; Xian Liu
文献索引：10.1002/celc.201800104
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摘要
A novel copper (Cu) and sulfur (S) co‐doped SnO2 material prepared by a facile hydrothermal method is demonstrated as an efficient electrocatalyst for the reduction of CO2 to formate. The as‐prepared SC10 holds rutile structure, whereas both Cu and S are doped well into the SnO2, in which S2− and Cu2+ replace O2− and Sn4+, respectively. The overpotential observed in CO2‐saturated 0.5 M NaHCO3 solution is as low as 130 mV (vs. RHE) at −0.75 V (vs. Ag/AgCl) and the maximum current density also increases to 5.5 mA cm−2 at −1.2 V, which is 7‐times higher than pure SnO2. The catalyst is stable for more than 33 h and the Faradic efficiency of formate is 58.5 %. The as‐synthesized catalyst will open up a novel route for efficient reduction to formate and has a great potential for relieving the greenhouse effect.