Shang Longmei, Lv Ximeng, Shen Hao, Shao Zhengzhong, Zheng Gengfeng
Laboratory of Advanced Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China.
Department of Macromolecules Science, Fudan University, Shanghai 200438, China.
J Colloid Interface Sci. 2019 Sep 15;552:426-431. doi: 10.1016/j.jcis.2019.05.073. Epub 2019 May 23.
Developing an effective catalyst to reduce carbon dioxide (CO) to value-added C products is a key challenge for CO utilization. Here we report a core-shell copper with native oxide (Cu@CuO) catalyst featuring a thin native oxide layer on the surface grown under ambient conditions. The Cu(I) oxide species on Cu@CuO surface remained relatively stable against reduction under CO electroreduction condition, and the synergism between surface Cu and Cu in Cu@CuO contributed to boosting its efficiency and selectivity toward C products. This Cu@CuO catalyst achieved an excellent selectivity (∼50% at -1.0 V vs reversible hydrogen electrode) for C (ethylene and ethanol) production.
开发一种有效的催化剂将二氧化碳（CO₂）还原为增值碳产物是二氧化碳利用的关键挑战。在此，我们报道了一种具有天然氧化物的核壳铜（Cu@CuO）催化剂，其表面在环境条件下生长有一层薄的天然氧化物层。Cu@CuO表面的氧化亚铜（Cu₂O）物种在CO₂电还原条件下对还原相对稳定，且Cu@CuO中表面Cu与体相Cu之间的协同作用有助于提高其对碳产物的效率和选择性。这种Cu@CuO催化剂在碳（乙烯和乙醇）产物生成方面实现了优异的选择性（相对于可逆氢电极，在-1.0 V时约为50%）。
