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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Tunable Ag Micromorphologies Show High Activities for Electrochemical H-2 Evolution and CO2 Electrochemical Reduction
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Tunable Ag Micromorphologies Show High Activities for Electrochemical H-2 Evolution and CO2 Electrochemical Reduction

机译:可调谐AG微晶显示出高活性的电化学H-2演化和CO2电化学减少

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摘要

Contaminate-free nanostructured Ag is prepared from electrochemical redox-treated Ag by two different potential pulses (DP and r-DP) in an NaBr aqueous solution. Agr-Dp and Ag-DP from r-DP and DP, respectively, are easily tuned for their activities in the hydrogen evolution reaction (HER) favoring or selective CO2 reduction reaction (CO2RR). Agr-Dp shows Pt-like HER activity in H(2)SO(4 )aqueous solution, and Ag-Dp is capable of electrochemically reducing CO2 to CO with approximately 97.8% catalytic selectivity at a low overpotential of similar to 0.25 V in NaHCO3 aqueous solution. The electrochemical signals for the first observed CO2 center dot- intermediate adsorption (CO2ads center dot-) and HCO3- adsorption (HCO3ads-) in the selected NaClO4 aqueous solution were used to understand the possible role of HCO3- in CO2RR.
机译:通过在NaBR水溶液中由两种不同的潜在脉冲(DP和R-DP)通过电化学氧化铜处理的Ag制备无污染的纳米结构Ag。 来自R-DP和DP的AGR-DP和Ag-DP分别易于调整其在氢进化反应(她)的活性或选择性CO 2还原反应(CO 2R)中的活性。 AGR-DP在H(2)所以(4)水溶液中,AG-DP在NaHCO 3中的低过电位下电化学减少CO 2至CO的PT-DP。 水溶液。 用于在所选NaClO4水溶液中首次观察到的CO2中心点中间吸附(CO2ADS中心点)和HCO3-吸附(HCO3ADS-)的电化学信号用于了解HCO3-在CO 2 RR中的可能作用。

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