Selective Reduction of Oxygen on Non‐Noble Metal Copper Nanocatalysts,Energy Technology

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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@CuO_x 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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