Reduced Graphene Oxide Regulates Indium Oxide In-Situ Reconstruction for Enhanced CO2 Electroreduction

IF 8.7 1区 化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xue Ding, Lingchun Zeng, Haoran Qiu, Wenhao Jing, Feng Wang, Ya Liu* and Liejin Guo*, 
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Abstract

The practical application of electrocatalytic CO2 reduction requires adaptation to the fluctuating voltage output of photovoltaic systems. However, potential-induced in-situ reconstruction of the catalyst complicates control and leads to Faradaic efficiency (FE) instability across the potential window. Here, we present a redox graphene-supported indium oxide catalyst (G-InOx), where rGO effectively regulates the surface evolution of InOx from In3+ to In0 during electrocatalytic reactions. The multivalent In generated via electrocatalytic in-situ reconstruction lowers the energy barriers for *OCHO formation and dissociation, enhancing formate production. rGO also regulates the surface environment, optimizing CO2 and proton delivery to the active sites. Over a wide potential range (−0.86 to −1.37 V vs RHE), G-InOx achieves FEformate nearly 100%. This work offers a straightforward and efficient strategy for scalable, high-performance CO2 electroreduction.

Abstract Image

还原氧化石墨烯调控氧化铟原位重建增强CO2电还原
电催化CO2还原的实际应用需要适应光伏系统的波动电压输出。然而,电位诱导的催化剂原位重构使控制复杂化,并导致整个电位窗口的法拉第效率(FE)不稳定。在这里,我们提出了一种氧化还原石墨烯负载的氧化铟催化剂(G-InOx),在电催化反应中,氧化石墨烯有效地调节了InOx从In3+到In0的表面演变。通过电催化原位重构生成的多价In降低了*OCHO形成和解离的能垒,提高了甲酸酯的产量。还原氧化石墨烯还可以调节表面环境,优化二氧化碳和质子向活性位点的传递。在较宽的电位范围内(- 0.86至- 1.37 V vs RHE), G-InOx几乎可以实现100%的fe甲酸。这项工作为可扩展的高性能CO2电还原提供了一种简单有效的策略。
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来源期刊
ACS Materials Letters
ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
14.60
自引率
3.50%
发文量
261
期刊介绍: ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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