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Anode Photovoltage Compensation-Enabled Synergistic CO_2 Photoelectrocatalytic Reduction on a Flower-Like Graphene-Decorated Cu Foam Cathode

机译：阳极光伏补偿支持的协同CO_2光电催化减少花朵状石墨烯装饰的Cu泡沫阴极

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摘要

An interconnected and hierarchically structured electrode composed of a Cu nanoparticle-modified flower-like reduced graphene oxide-decorated copper foam (Cu NP/f-RGO/CF) is crafted and exploited for photoelectrocatalytic (PEC) reduction of CO(2)in a TiO(2)nanotube photoanode-driven PEC cell. Anode photovoltage compensation confers a more negative cathode potential for CO(2)reduction, thus leading to a synergistic effect between photocatalysis (PC) and electrocatalysis (EC). CO(2)reduction rate under PEC condition is 5.4x higher than that of the simple sum under PC and EC processes. The well-defined flower structure of RGO in the CF scaffold effectively prevents its self-agglomeration, which increases its adsorption towards CO(2)with improved electron-transfer kinetics due to the 3D interconnected structure with abundant electron transfer pathways. DFT calculations further reveal the absorption and activation of CO(2)on Cu NP/f-RGO capitalize on the C-C bond with RGO and O-Cu bond with Cu NPs, thereby leading to a bended and stretched structure. The enhanced CO(2)adsorptivity and activation on the hierarchical Cu NP/f-RGO/CF electrode significantly improve CO(2)reduction and facilitate the conversion of C1 products to high-order products. This research highlights the great prospect of anode photovoltage compensation enables synergistic photoelectrocatalysis and 3D hierarchical electrode for CO(2)drastic reduction into high-order products.
机译：由Cu纳米颗粒改性的花状的石墨烯氧化物装饰的铜泡沫（Cu NP / F-Rgo / CF）组成的互连和分层结构电极被制成和利用了CO（2）的光电催化剂（PEC）减少TiO（2）Nanotube PhotoNode驱动的PEC细胞。阳极光伏补偿赋予CO（2）减少的更负阴极电位，从而导致光催化（PC）和电常值（EC）之间的协同效应。 PEC条件下的CO（2）减少率比PC和EC过程下的简单总和高5.4倍。 CF支架中的Rgo的明确花结构有效地防止了其自聚集，这使其对CO（2）的吸附增加，其由于具有丰富的电子转移途径的3D互连结构而改善的电子转移动力学。 DFT计算进一步揭示了C-C与RGO和O-Cu键对Cu NP / F-Rgo对Cu NP / F-RGO的吸收和活化与Cu NPS的C-C键，从而导致弯曲和拉伸的结构。增强型Co（2）叠层Cu NP / F-RGO / CF电极的吸附性和活化显着改善Co（2）减少，并促进C1产品的转化为高阶产品。该研究突出了阳极光伏补偿的巨大前景，使得协同光电二零和3D层次电极用于CO（2）的急剧减少到高阶产品。

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  • 来源
    《Advanced Functional Materials》 |2020年第52期|2005983.1-2005983.10|共10页
  • 作者

    Zhang Meng; Xuan Xiaoxu; Wang Wenlong; Ma Chunyuan; Lin Zhiqun;

  • 作者单位

    Shandong Univ Sch Energy & Power Engn Natl Engn Lab Reducing Emiss Coal Combust Jinan 250061 Peoples R China|Georgia Inst Technol Sch Mat Sci & Engn Atlanta GA 30332 USA;

    Shandong Univ Sch Mech Engn Jinan 250061 P. R. China;

    Shandong Univ Sch Energy & Power Engn Natl Engn Lab Reducing Emiss Coal Combust Jinan 250061 Peoples R China;

    Shandong Univ Sch Energy & Power Engn Natl Engn Lab Reducing Emiss Coal Combust Jinan 250061 Peoples R China;

    Georgia Inst Technol Sch Mat Sci & Engn Atlanta GA 30332 USA;

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  • 正文语种 eng
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  • 关键词

    3D hierarchical electrodes; anode-photovoltage compensation; CO(2)reduction; photoelectrocatalysis;

    机译：3D层次电极;阳极光伏补偿;CO（2）减少;光电偶数分析;

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