Photothermal Approach on Chemical Looping Method for Reverse Water Gas Shift Reaction Using Defective Molybdenum Oxide

IF 7.4 Q1 ENGINEERING, ENVIRONMENTAL

ACS ES&T engineering Pub Date : 2025-01-07 DOI:10.1021/acsestengg.4c0070710.1021/acsestengg.4c00707

Daichi Takami, Taku Kishimura, Yasutaka Kuwahara* and Hiromi Yamashita*,

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Abstract

CO₂ conversion technologies utilizing solar light have garnered significant attention for establishing sustainable societies. Despite the extensive investigation of photothermal approaches, the effect of direct light irradiation on oxygen carriers on the reverse water gas shift chemical looping (RWGS-CL) reaction has not yet been explored. In this study, we investigated the effects of light irradiation on the activity of Pt-loaded metal oxides in the RWGS-CL reaction at 473 K. The Pt/MoO_3–x material exhibited remarkable activity for the photo-assisted RWGS-CL reaction, which was attributed to its high concentration of oxygen vacancies and photothermal property. Moreover, it is notable that the light-induced heating was more effective than uniform heating in the exothermic H₂-reduction step due to the preferable temperature gradient in the material. This study opens up new potentials for the photothermal-assisted CL method, including the separation of the endothermic and exothermic processes of reactions and the strategic use of light-induced temperature gradients.

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缺陷氧化钼反水气转换反应化学环法的光热研究

利用太阳能的二氧化碳转换技术已经引起了建立可持续社会的极大关注。尽管光热方法已经得到了广泛的研究，但直接光照射氧载体对反水气移化学环反应（RWGS-CL）的影响尚未得到探讨。在本研究中，我们研究了在473 K下光照对RWGS-CL反应中负载pt金属氧化物活性的影响。Pt/ MoO3-x材料在光辅助RWGS-CL反应中表现出显著的活性，这主要归功于其高浓度的氧空位和光热性质。此外，由于材料的温度梯度较好，在放热h2还原步骤中，光诱导加热比均匀加热更有效。该研究为光热辅助CL方法开辟了新的潜力，包括分离反应的吸热和放热过程以及策略性地利用光诱导温度梯度。

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来源期刊

ACS ES&T engineering ENGINEERING, ENVIRONMENTAL-

CiteScore

8.50

自引率

0.00%

发文量

期刊介绍： ACS ES&T Engineering publishes impactful research and review articles across all realms of environmental technology and engineering, employing a rigorous peer-review process. As a specialized journal, it aims to provide an international platform for research and innovation, inviting contributions on materials technologies, processes, data analytics, and engineering systems that can effectively manage, protect, and remediate air, water, and soil quality, as well as treat wastes and recover resources. The journal encourages research that supports informed decision-making within complex engineered systems and is grounded in mechanistic science and analytics, describing intricate environmental engineering systems. It considers papers presenting novel advancements, spanning from laboratory discovery to field-based application. However, case or demonstration studies lacking significant scientific advancements and technological innovations are not within its scope. Contributions containing experimental and/or theoretical methods, rooted in engineering principles and integrated with knowledge from other disciplines, are welcomed.