Beyond Copper in CO2 Electrolysis: Effective Hydrocarbon Production on Silver-Nanofoam Catalysts
Beyond Copper in CO2 Electrolysis: Effective Hydrocarbon Production on Silver-Nanofoam Catalysts
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DOI：
10.1021/acscatal.8b01738
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发表时间：
2018-09-01
期刊：
影响因子：
12.9
通讯作者：
Broekmann, Peter
中科院分区：
文献类型：
--
作者：
Dutta, Abhijit;Morstein, Carina Elisabeth;Broekmann, Peter
基于协同添加剂和模板辅助的金属沉积过程，开发了用于电化学CO2还原反应（ec-CO2 RR）的泡沫银催化剂。在水介质中（CO2饱和的0.5 M KHCO 3电解质），这些银泡沫显示出高的活性和选择性对CO的生产在低和中等过电位。在类似于900 mV的极宽电位窗口内，CO（FECO）的法拉第效率从未低于90%，相对于可逆氢电极（RHE），从-0.3 V开始，最高达到-1.2 V。一个增加的吸附能的CO上的银泡沫被讨论的起源的有效抑制的竞争性析氢反应（HER）在这个潜在的范围内。在潜在的
Ag-foam catalysts have been developed for the electrochemical CO2 reduction reaction (ec-CO2RR) based on a concerted additive- and template-assisted metal-deposition process. In aqueous media (CO2-saturated 0.5 M KHCO3 electrolyte), these Ag foams show high activity and selectivity toward CO production at low and moderate over-Potentials. Faradaic efficiencies for CO (FECO) never fell below 90% within an extremely broad potential window of similar to 900 mV, starting at -0.3 V and reaching up to -1.2 V versus a reversible hydrogen electrode (RHE). An increased adsorption energy of CO on the Ag foam is discussed as the origin of the efficient suppression of the competing hydrogen-evolution reaction (HER) in this potential range. At potentials of