Enhancing formate yield through electrochemical CO2 reduction using BiOCl and g-C3N4 hybrid catalyst

IF 2.7 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Inorganica Chimica Acta Pub Date : 2024-09-26 DOI:10.1016/j.ica.2024.122395
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Abstract

Electrochemical carbon dioxide (CO2) reduction with bismuth-based catalysts has been widely investigated in the recent few years. This is due to bismuth’s ability to perform selective electrochemical CO2 reduction reaction (eCO2RR) to an important C1 product, the formate (HCOO). However, boosting the performance of such catalysts is a continuous investigation. In this work, enhancing the active sites for eCO2RR is investigated by forming nanocomposites with graphitic carbon nitride (g-C3N4). BiOCl is synthesized by a simple wet-chemical approach in the presence of glycine as size-controlling agent and formed into nanocomposites, which were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Infrared (IR) Spectroscopy and N2 physisorption. Linear Sweep Voltammetry (LSV) in argon and CO2-saturated atmosphere showed higher current values in the case of CO2. Chronoamperometries (CA) were recorded at −1.06 V vs Reversible Hydrogen Electrode (RHE) for 5400 s obtaining Faradic Efficiencies (FE) varying in the range of 70–77 % depending on the nanocomposites’ composition. In fact, 52.1 wt% BiOCl/g-C3N4 formed the highest yields for formate (with also the highest rate of formation of formate) together with a minimal production of H2 and CO. The effect of nano-structuration induced by glycine, used as a size-controlling agent, to form nanoplates was crucial: microplates of BiOCl produced without glycine showed an FE of 4 %, reaching 85 % in the case of the nanoplates. Post-electrocatalysis characterization revealed the possible role of Bi2O2CO3 as the active phase for eCO2RR.

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使用 BiOCl 和 g-C3N4 混合催化剂通过电化学二氧化碳还原提高甲酸酯产量
近年来,使用铋基催化剂进行电化学二氧化碳(CO2)还原反应的研究十分广泛。这是因为铋能够进行选择性电化学二氧化碳还原反应(eCO2RR),生成重要的 C1 产物--甲酸(HCOO-)。然而,提高此类催化剂的性能是一项持续的研究。在这项工作中,研究人员通过与氮化石墨碳(g-C3N4)形成纳米复合材料来增强 eCO2RR 的活性位点。在甘氨酸作为尺寸控制剂的存在下,通过简单的湿化学方法合成了 BiOCl,并将其制成纳米复合材料,通过扫描电子显微镜 (SEM)、X 射线衍射 (XRD)、拉曼光谱、X 射线光电子能谱 (XPS)、红外 (IR) 光谱和 N2 物理吸附对其进行了表征。氩气和二氧化碳饱和气氛下的线性扫描伏安法(LSV)显示,二氧化碳的电流值更高。根据纳米复合材料的成分,在-1.06 V 与可逆氢电极(RHE)的电压下记录了 5400 秒的计时器(CA),得到的法拉第效率(FE)在 70-77 % 的范围内变化。事实上,52.1 wt% 的 BiOCl/g-C3N4 形成的甲酸盐产量最高(甲酸盐的形成率也最高),同时产生的 H2 和 CO 极少。甘氨酸(用作尺寸控制剂)诱导的纳米结构化对形成纳米板的影响至关重要:在不使用甘氨酸的情况下生产的微板 BiOCl 的 FE 为 4%,而在使用纳米板的情况下则达到 85%。电催化后表征显示,Bi2O2CO3 可能是 eCO2RR 的活性相。
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来源期刊
Inorganica Chimica Acta
Inorganica Chimica Acta 化学-无机化学与核化学
CiteScore
6.00
自引率
3.60%
发文量
440
审稿时长
35 days
期刊介绍: Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.
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