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Upcycling waste protein and heavy metal into single-atom catalytic gas diffusion electrode for CO2 reduction
The global production of organic wastes and heavy metals (HMs) poses significant environmental risks, along with considerable carbon emissions from waste decomposition. This highlights the significance of synergistic management of both wastes and CO2, which is a vital strategy for mitigating environmental pollution and climate change. Herein, we employed waste protein from wastewater produced during soybean peptide (SP) processing as a carbon matrix to anchor HMs Ni from electroplating wastewater. This mixture was electrospun into a gas diffusion electrode (GDE). This unique GDE design eliminates the need for a separate gas diffusion layer (GDL) and simplifies catalyst production. This versatile GDE consists of nanofibers with uniformly dispersed Ni single atom catalysts (SACs) on the fiber surface. Therefore, boasts a porous structure that facilitates CO2 diffusion and storage. The homogeneous distribution of Ni SACs within the GDE fosters high activity in the electrochemical conversion of CO2 to CO. At 50 mA/cm2 and 2.5 V cell voltage, Ni SACs achieved an excellent Faradaic efficiency of 81%–98% in a membrane electrode assembly (MEA). This technique holds a promise in achieving the collaborative management of carbon mitigation and wastes recovery.
Upcycling waste protein and heavy metal into single-atom catalytic gas diffusion electrode for CO2 reduction
The global production of organic wastes and heavy metals (HMs) poses significant environmental risks, along with considerable carbon emissions from waste decomposition. This highlights the significance of synergistic management of both wastes and CO2, which is a vital strategy for mitigating environmental pollution and climate change. Herein, we employed waste protein from wastewater produced during soybean peptide (SP) processing as a carbon matrix to anchor HMs Ni from electroplating wastewater. This mixture was electrospun into a gas diffusion electrode (GDE). This unique GDE design eliminates the need for a separate gas diffusion layer (GDL) and simplifies catalyst production. This versatile GDE consists of nanofibers with uniformly dispersed Ni single atom catalysts (SACs) on the fiber surface. Therefore, boasts a porous structure that facilitates CO2 diffusion and storage. The homogeneous distribution of Ni SACs within the GDE fosters high activity in the electrochemical conversion of CO2 to CO. At 50 mA/cm2 and 2.5 V cell voltage, Ni SACs achieved an excellent Faradaic efficiency of 81%–98% in a membrane electrode assembly (MEA). This technique holds a promise in achieving the collaborative management of carbon mitigation and wastes recovery.
Upcycling waste protein and heavy metal into single-atom catalytic gas diffusion electrode for CO2 reduction
Front. Environ. Sci. Eng.
Zhou, Baiqin (Autor:in) / Li, Zhida (Autor:in) / Zhang, Chunyue (Autor:in) / Lu, Lu (Autor:in)
01.04.2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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| British Library Online Contents | 2018
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| British Library Online Contents | 2018