CuOx supported LaCoO3 perovskite for the photoassisted reverse water gas shift reaction at low temperature

IF 7.2 2区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Journal of CO2 Utilization Pub Date : 2024-09-13 DOI:10.1016/j.jcou.2024.102925
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Abstract

CuOx/LaCoO3 systems have been studied for the rWGS reaction under thermal assisted photocatalytic conditions within low temperature range of 180–330 ºC. CuOx species deposited from chemical reduction method over LaCoO3 homogeneously covered the perovskite surface. The reduction pretreatment before reaction leads to the partial Co reduction and the complete reduction of Cu. A significant improvement on CO production has been attained upon Cu incorporation. In addition, upon UV–vis irradiation the CO production is also enhanced. Best results have been obtained for 5 wt% Cu. The highest synergistic effect was observed for the lowest temperature, for which catalytic contribution is negligible. Thus, a good compromise is attained at 300 ºC for which a CO production of 5.45 mmol/h·g and 92 % selectivity, showing a good synergistic effect between thermo and thermo-photocatalytic activity.

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用于低温光助反向水气变换反应的氧化铜支撑 LaCoO3 包晶石
研究了 CuOx/LaCoO3 系统在 180-330 ºC 低温范围内热辅助光催化条件下的 rWGS 反应。化学还原法沉积在 LaCoO3 上的铜氧化物均匀地覆盖在过氧化物表面。反应前的还原预处理导致部分钴的还原和铜的完全还原。加入铜后,CO 的生成量有了明显的提高。此外,在紫外-可见光照射下,一氧化碳的生成量也得到了提高。5 wt% Cu 的效果最好。在最低温度下观察到的协同效应最高,其催化作用可以忽略不计。因此,在 300 ºC 时可以达到很好的折衷效果,一氧化碳产量为 5.45 mmol/h-g,选择性为 92%,这表明热催化活性和热光催化活性之间存在良好的协同效应。
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来源期刊
Journal of CO2 Utilization
Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.90
自引率
10.40%
发文量
406
审稿时长
2.8 months
期刊介绍: The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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