Science Bulletin | 电化学CO2反应的界面调控
时间: 2022-11-09 作者: 浏览次数: 795

题目:

Modulating Electrochemical CO2 Reduction at Interfaces

作者:

JieZhang, BinbinPan, YanguangLi*

摘要:

Electrochemical CO2 reduction reaction (CO2RR) can enable the valorization of CO2 to useful chemicals and fuels, and may contribute to reducing the global carbon footprint and achieving the carbon-neutrality goal by mid-century. Depending on the catalysts used and reaction conditions adopted, it may yield a variety of reduction products ranging from C1 (e.g. CO, formic acid, methane and methanol), C2 (e.g., ethylene, ethanol and acetate) to C3 (e.g., propanol) hydrocarbons and oxygenates. Studies have established that state-of-the-art Au, Ag and single-atom catalysts can convert CO2 to CO with near-unity selectivity, and that Bi, Sn and In can efficiently reduce CO2 to formic acid or formate. Cu so far represents the only metal that can transform CO2 beyond two-electron reduction at appreciable rates and selectivity. This is mainly attributed to its relatively strong affinity for *CO that leads to high *CO surface coverage necessary for subsequent C–C coupling as well as its suitable binding energy toward other key reaction intermediates. Unfortunately, its selectivity for any single product is generally unsatisfactory owing to the subtle balance and competition among multiple possible reaction pathways. To steer the reaction selectivity toward higher-value C2+ products would require deeply understanding the reaction mechanism and effectively modulating the binding energy of key reaction intermediates. To this end, rational design and engineering of catalyst materials such as selective facet exposure, defect engineering, alloying and doping have been proposed and explored. Many exciting progresses have been made as accounted in a number of excellent reviews. Even though these strategies are proven effective in some regards, they cannot yet render CO2RR a commercially viable technology.

影响因子:

11.780

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