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Selective Reduction of Oxygen on Non‐Noble Metal Copper Nanocatalysts
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-14 , DOI: 10.1002/ente.201901213
Andrew N. Kuhn 1 , Yanling Ma 1 , Cheng Zhang 1 , Zhitao Chen 1 , Mingyan Liu 1 , Yongqi Lu 2 , Hong Yang 1
Affiliation  

Efficient removal of molecular oxygen (O2) from flue gas is necessary to capture and utilize carbon dioxide (CO2) from fossil‐fuel sources. Herein, the catalytic reduction of O2 in simulated flue gases using alumina‐supported copper (Cu) nanostructures is presented. The Cu catalyst outperformed conventional palladium systems for the selectivity toward CO2 over carbon monoxide (CO). Varying the reactant feed ratio can lead to structural rearrangements at the surface of Cu nanoparticles, resulting in significant differences in catalytic activity. Under optimal conditions, a favorable Cu@CuOx core‐shell structure is observed to exhibit both excellent activity and selectivity to CO2. The simulated flue gas is purified from 85% to >99.9% (v/v) CO2 after passing the catalytic system. The catalyst also exhibits high stability, showing only ≈0.1% drop in CO2 after 10 h on stream. This design marks progress toward the sequestration of CO2 and the development of non‐noble catalysts by tuning their dynamic nanostructures under controllable reaction conditions.

中文翻译:

非贵金属铜纳米催化剂上的氧气选择性还原

要从化石燃料来源中捕获和利用二氧化碳(CO 2),必须从烟道气中有效去除分子氧(O 2)。本文介绍了使用氧化铝负载的铜(Cu)纳米结构在模拟烟道气中催化还原O 2的方法。Cu催化剂对一氧化碳(CO)的CO 2选择性优于传统的钯体系。改变反应物进料比可导致Cu纳米颗粒表面的结构重排,从而导致催化活性的显着差异。在最佳条件下,观察到良好的Cu @ CuO x核-壳结构,表现出出色的活性和对CO 2的选择性。通过催化系统后,将模拟烟气从85%净化至> 99.9%(v / v)CO 2。催化剂还显示出高稳定性,在运行10小时后,CO 2下降仅约0.1%。通过在可控制的反应条件下调节其动态纳米结构,该设计标志着向固存CO 2和开发非贵重催化剂的进展。
更新日期:2020-01-14
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