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Highly efficient manganese oxide decorated graphitic carbon nitrite electrocatalyst for reduction of CO2 to formate
Catalysis Today ( IF 5.2 ) Pub Date : 2020-12-29 , DOI: 10.1016/j.cattod.2020.12.008
Balaji B. Mulik , Ajay V. Munde , Balasaheb D. Bankar , Ankush V. Biradar , Bhaskar R. Sathe

Herein, an effective electrocatalyst exploiting non-noble metal oxide-containing of manganese oxide (MnO2) supported on graphitic carbon nitride (g-C3N4) for reduction of CO2 over a wide range of potential. The MnO2 decorated g-C3N4 nanocomposite was synthesized by precipitation, followed by calcination to attain uniform distribution of the MnO2. The MnO2 was found α-MnO2 crystal structure with a size of ∼0.5–2 nm having interlinear lattice spacing of 0.243 nm seen on the layer of g-C3N4 (50−100 nm). The high defective sites observed on MnO2/g-C3N4 (ID/IG) is 1.91 than pristine g-C3N4 (ID/IG) is 0.054. The core spectrum analysis of XPS showed N, C, O and Mn atoms in the as-synthesized composite. The electrocatalysts were executed for electrocatalytic hydrogenation of CO2 at lower onset potential of −0.14 V vs. RHE into C1 products having Faradaic efficiencies (FE) of 8, 47.45 and 65.28% at an applied potential of −0.14, −0.34 and −0.54 V vs. RHE, respectively. The catalyst has further used for the chemical hydrogenation of CO2, and the good yield of formic acid was 9603.28 μmol obtained. The enrichment of the electrocatalytic activities was observed due to the synergetic effect of both MnO2 and g-C3N4. This methodology will be applicable for industrial applications and it will help control environmental issues.



中文翻译:

高效氧化锰修饰的石墨亚硝酸碳电催化剂,用于将CO 2还原为甲酸酯

本文中,有效的电催化剂利用载于石墨氮化碳(gC 3 N 4)上的含氧化锰(MnO 2)的非贵金属氧化物在大范围的电位上还原CO 2。通过沉淀合成MnO 2装饰的gC 3 N 4纳米复合材料,然后煅烧以获得MnO 2的均匀分布。MnO的2发现α-MnO的2晶体结构与具有行间看到GC的层上的0.243纳米晶格间距的尺寸为纳米~0.5-2 3 Ñ 4(50-100 nm)。在MnO 2 / gC 3 N 4(I D / I G)上观察到的高缺陷位为1.91,而原始gC 3 N 4(I D / I G)为0.054。XPS的核心光谱分析表明,合成后的复合物中存在N,C,O和Mn原子。执行电催化剂以在相对于RHE较低的起始电势-0.14 V下将CO 2电催化氢化为具有法拉第效率(FE)为8、47.45和65.28%的C 1产品,施加电势为-0.14,-0.34和-分别为0.54 V与RHE。该催化剂进一步用于CO的化学加氢由图2可知,甲酸的收率良好,为9603.28μmol。由于MnO 2和gC 3 N 4的协同作用,观察到了电催化活性的富集。该方法将适用于工业应用,并将有助于控制环境问题。

更新日期:2020-12-29
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