Upcycling waste protein and heavy metal into single-atom catalytic gas diffusion electrode for CO_(2)reduction  

作　　者：Baiqin Zhou Zhida Li Chunyue Zhang Lu Lu 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen 518055,China

出　　处：《Frontiers of Environmental Science & Engineering》2025年第4期187-198,共12页环境科学与工程前沿(英文)

基　　金：supported by the National Natural Science Foundation of China(No.22176046);the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(No.52321005);the Shenzhen Science and Technology Program(Nos.KQTD20190929172630447,JCYJ20210324124209025,and GXWD20220811173949005);the Natural Science Foundation of Guangdong Province(No.2022A1515012016).

摘　　要：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 CO_(2),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 CO_(2)diffusion and storage.The homogeneous distribution of Ni SACs within the GDE fosters high activity in the electrochemical conversion of CO_(2)to CO.At 50 mA/cm^(2)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.

关 键 词：Waste protein Heavy metal wastewater Ni single atom ELECTROSPINNING Gas diffusion electrode CO_(2)reduction 

分 类 号：X703[环境科学与工程—环境工程]