快速合成型Bi@CuNS催化剂用于CO_(2)电化学还原制备乙烯

Rapid Synthesis Bi@CuNS Catalyst for Electrochemical Reduction of CO_(2)to Prepare Ethylene

将CO_(2)通过电化学还原转化为高附加值的碳氢产物是一种实现碳循环和利用的有效途径,而在实际使用过程中存在催化剂制备复杂导致的难以大规模应用的问题。制备了一种利用NaBH_(4)快速还原的Cu-Bi双金属催化剂,以CuO纳米片作为载体,负载Bi金属颗粒,通过调节Bi的质量分数,使得Cu基催化剂对乙烯(C_(2)H_(4))拥有较高的选择性和法拉第效率(FE),在-1.6 V(针对可逆氢电极(RHE))下,C_(2)H_(4)的最大法拉第效率为45.8%,并且在经过20 h的电解后,仍然保持着超过40%的法拉第效率,具有优异的稳定性,因此本催化剂具有的快速制备的能力及较高的活性为未来工业生产中的实际应用提供了全新的研究思路。

The conversion of CO_(2)into high value-added hydrocarbon products through electrochemical reduction is an effective way to realize carbon cycle and utilization.However,in the actual use process,it is difficult to be applied on a large scale due to the complexity of catalyst preparation.A Cu-Bi bimetallic catalyst for rapid reduction by NaBH_(4)was prepared.CuO nanosheets were used as the carrier to load Bi metal particles.By adjusting the mass fractions of Bi,the Cu-based catalyst has the higher selectivity and Faraday efficiency(FE)for ethylene(C_(2)H_(4)).Under-1.6 V(vs.reversible hydrogen electrode(RHE)),the maximum Faraday efficiency of C_(2)H_(4)is 45.8%,and the Faraday efficiency is still more than 40%after 20 h of electrolysis,showing excellent stability.Therefore,rapid preparation and higher activity of the catalyst provide a new research idea for the practical application of industrial production in the future.