Synthesis and Characterization of (Cu, S) Co‐doped SnO2 for Electrocatalytic Reduction of CO2 to Formate at Low Overpotential,ChemElectroChem

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Synthesis and Characterization of (Cu, S) Co‐doped SnO2 for Electrocatalytic Reduction of CO2 to Formate at Low Overpotential
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-03-09 , DOI: 10.1002/celc.201800104
Xueyan Hu ₁ , Huimin Yang ₁ , Minmin Guo ₁ , Mengting Gao ₁ , Erhui Zhang ₁ , Haoyang Tian ₁ , Zhenhai Liang ₁ , Xian Liu ₂

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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.

中文翻译：

（Cu，S）共掺杂SnO2的合成和表征，用于在低超电势下将CO2电催化还原成甲酸酯

通过简便的水热法制备的新型铜（Cu）和硫（S）共掺杂的SnO ₂材料被证明是将CO ₂还原为甲酸的有效电催化剂。制成的SC ₁₀具有金红石结构，而Cu和S都很好地掺杂到SnO _2中，其中S ^2-和Cu ^2+分别代替O ^2-和Sn ⁴⁺。在-0.75 V（vs. Ag / AgCl）下，在充满CO _2的0.5 M NaHCO ₃溶液中观察到的过电势低至130 mV（vs. RHE），最大电流密度也增加到5.5 mA cm ^-2在−1.2 V下，比纯SnO ₂高7倍。催化剂稳定超过33小时，甲酸的法拉第效率为58.5％。合成后的催化剂将开辟一条有效还原甲酸酯的新途径，并具有减轻温室效应的巨大潜力。

更新日期：2018-03-09

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