Catalytic Conversion of CO2 to Formate Promoted by a Biochar-Supported Nickel Catalyst Sourced from Nickel Phytoextraction Using Cyanogen-Rich Cassava,ACS Earth and Space Chemistry

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Catalytic Conversion of CO2 to Formate Promoted by a Biochar-Supported Nickel Catalyst Sourced from Nickel Phytoextraction Using Cyanogen-Rich Cassava
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2021-09-07 , DOI: 10.1021/acsearthspacechem.1c00223
Babatunde J. Akinbile ₁ , Leah C. Matsinha ₁ , Abayneh A. Ambushe ₁ , Banothile C. E. Makhubela ₁

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In this work, we have demonstrated for the first time that a cyanogen-glucoside-rich cassava plant (Manihot esculenta) is highly efficient in phytoextraction (up to 88%) of nickel to obtain a type of bio-ore comprising Ni nanoparticles (NPs) supported on the recovered plant material. Up to 1251 ppm was extracted from low Ni concentration soil by the cassava plant, as was measured by flame atomic absorption spectrometry. The bio-ore was used as a resource for preparing a heterogeneous catalyst (Ni@CassCat), in which Ni NPs are supported on mesoporous biochar following a calcination step. Ni@CassCat was characterized using high-resolution transmission electron microscopy with energy-dispersive X-ray, scanning electron microscopy with energy-dispersive X-ray, powder X-ray diffraction, N₂-sorption techniques, and ultraviolet–visible spectrometry. Subsequently, Ni@CassCat was used as a heterogeneous catalyst to hydrogenate carbon dioxide (CO₂) to formate with a turnover number of 485. Furthermore, the recyclability of Ni@CassCat was demonstrated. This work demonstrates a two-pronged approach to sustainability, transforming two waste streams (mine tailings and CO₂) to value.

中文翻译：

使用富氰木薯提取镍植物提取的生物炭负载镍催化剂促进 CO2 催化转化为甲酸盐

在这项工作中，我们首次证明了富含氰苷的木薯植物（Manihot esculenta）在植物提取（高达 88%）镍方面非常有效，以获得一种包含镍纳米颗粒（NPs）的生物矿。 ) 支撑在回收的植物材料上。通过火焰原子吸收光谱法测量，木薯植物从低 Ni 浓度土壤中提取了高达 1251 ppm 的镍。生物矿石被用作制备多相催化剂（Ni@CassCat）的资源，其中在煅烧步骤后，Ni NPs 被负载在介孔生物炭上。Ni@CassCat 使用高分辨率透射电子显微镜与能量色散 X 射线、扫描电子显微镜与能量色散 X 射线、粉末 X 射线衍射、N ₂- 吸附技术和紫外-可见光谱法。随后，Ni@CassCat 用作非均相催化剂，将二氧化碳 (CO ₂ )氢化成甲酸盐，转化率为 485。此外，Ni@CassCat 的可回收性也得到了证明。这项工作展示了一种双管齐下的可持续性方法，将两种废物流（矿山尾矿和 CO ₂）转化为价值。

更新日期：2021-10-22

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