Grain-boundary-proximal hydroxyl defects in Pt-regulated inverse spinel high-entropy oxide enabling efficient CO_(2)photoreductionOA
Achieving efficient photocatalytic performance for high-entropy oxides(HEOs)continues to pose a significant challenge,primarily attributed to their intrinsically limited charge carrier mobility and sluggish surface reaction kinetics resulting from heterogeneous defect distributions.Herein,the new Pt-regulated inverse spinel HEOs with honeycomb-like architecture are developed employing a facile sol-gel technique.The doping of trace amounts of Pt in the octahedral B voids of the high-entropy(FeZnAlCoMn)_(3)O_(4)can enable electronic structure optimization and regulate the grain-boundary-proximal hydroxyl defects,thereby improving CO_(2)adsorption/activation capabilities,charge transfer and separation efficiency,and surface reaction kinetics.As a result,the optimal high-entropy 1.6%Pt-(FeZnAlCoMn)_(3)O_(4)achieves 3.41 times the average CO evolution rate of(FeZnAlCoMn)_(3)O_(4)and stable operations for 4 cycles in the photocatalytic CO_(2)reduction.This contribution provides novel insights into the targeted design and regulation of high-entropy oxides(HEOs)for efficient photocatalytic CO_(2)reduction,thereby establishing a new paradigm for grain boundary defect engineering that can be extended to other application fields.
Xuran Lei;Chunhong Qu;Yun Wang;Lei Wang;Wenli Zhang;Min Zhang;Deping Wang;Liqiu Zhang;Chunmei Li;Hongjun Dong
Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaCollege of Biological,Chemical Sciences and Engineering,Jiaxing University,Jiaxing,Zhejiang,314001,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,ChinaAdvanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province,Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,China
化学化工
Inverse spinel high-entropy oxidesPt-regulationGrain boundarySurface hydroxyl defectsPhotocatalytic CO_(2)reduction
《Green Energy & Environment》 2026 (5)
P.1373-1384,12
supported by the National Natural Science Foundation of China(52072153)the Graduate Research Innovation Program of Jiangsu Provincial(KYCX24_4008)the College Student Innovation and Entrepreneurship Project(X2025102990467,X2025102990460).
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