The active sites of Cu–ZnO catalysts for water gas shift and CO hydrogenation reactions
Zhenhua Zhang,Zhenhua Zhang,Xuanye Chen,Jincan Kang,Zongyou Yu,Jie Tian,Zhongmiao Gong,Ai-Ping Jia,Ai-Ping Jia,Rui You,Kun Qian,Shun He,Botao Teng,Yi Cui,Ye Wang,Wenhua Zhang,Weixin Huang +16 more
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TLDR
In this article, a comprehensive experimental and theoretical calculation study of a series of ZnO/Cu nanocrystals inverse catalysts with well-defined Cu structures was conducted to identify the active sites of Cu-ZnO catalysts for water gas shift and CO hydrogenation reactions.Abstract:
Cu–ZnO–Al2O3 catalysts are used as the industrial catalysts for water gas shift (WGS) and CO hydrogenation to methanol reactions. Herein, via a comprehensive experimental and theoretical calculation study of a series of ZnO/Cu nanocrystals inverse catalysts with well-defined Cu structures, we report that the ZnO–Cu catalysts undergo Cu structure-dependent and reaction-sensitive in situ restructuring during WGS and CO hydrogenation reactions under typical reaction conditions, forming the active sites of CuCu(100)-hydroxylated ZnO ensemble and CuCu(611)Zn alloy, respectively. These results provide insights into the active sites of Cu–ZnO catalysts for the WGS and CO hydrogenation reactions and reveal the Cu structural effects, and offer the feasible guideline for optimizing the structures of Cu–ZnO–Al2O3 catalysts. Identification of active sites of a catalyst is the Holy Grail in heterogeneous catalysis. Here, the authors successfully identify the CuCu(100)- hydroxylated ZnO ensemble and CuCu(611)Zn alloy as the active sites of Cu-ZnO catalysts for water gas shift and CO hydrogenation reactions, respectively.read more
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Journal ArticleDOI
Progress in ZnO Nanosensors.
TL;DR: Zinc oxide (ZnO) is a unique semiconductor material with wide bandgap (3.37 eV) and high exciton binding energy (60 meV) at room temperature as discussed by the authors.
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Structure sensitivity of CuO in CO oxidation over CeO2-CuO/Cu2O catalysts
TL;DR: In this article , the structure sensitivity of CuO in the CeO2-CuO/c-Cu2O catalyzed CO oxidation was analyzed using the Mars-van Krevelen mechanism.
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Tuning activity and selectivity of CO2 hydrogenation via metal-oxide interfaces over ZnO-supported metal catalysts
Weiqi Liao,Cen Tang,Hao Zheng,Jieqiong Ding,Kefeng Zhang,Hengwei Wang,Ji-Qing Lu,Weixin Huang,Zhenhua Zhang +8 more
TL;DR: In this article , ZnO-supported Ru (Ru/ZnO) and Ni (Ni/ZNO) catalysts were used for CO2 hydrogenation and their interfacial structures were finely tuned by altering the nature of supported metal particles and the support morphology.
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Boosting Support Reducibility and Metal Dispersion by Exposed Surface Atom Control for Highly Active Supported Metal Catalysts
Myeong Gon Jang,Sinmyung Yoon,Dongjae Shin,Hyung-Jun Kim,Rui Huang,Euiseob Yang,Jihun Kim,Kug-Seung Lee,Kwangjin An,Jeong Woo Han +9 more
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The Route from Green H2 Production through Bioethanol Reforming to CO2 Catalytic Conversion: A Review
Eugenio Meloni,Marco Martino,Giuseppina Iervolino,Concetta Ruocco,Simona Renda,G. Festa,Vincenzo Palma +6 more
TL;DR: In this paper , the authors provide a review of the most recent progress in the catalysis of hydrogen production through sustainable reforming and CO2 utilization, focusing on the route that, starting from bioethanol reforming for H2 production, leads to the use of the produced CO2 for different purposes and by means of different catalytic processes, passing through the water-gas shift stage.
References
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TL;DR: In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports, which are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells.
Journal ArticleDOI
Active sites for CO2 hydrogenation to methanol on Cu/ZnO catalysts
Shyam Kattel,Pedro J. Ramírez,Jingguang G. Chen,Jingguang G. Chen,José A. Rodriguez,José A. Rodriguez,Ping Liu,Ping Liu +7 more
TL;DR: A direct comparison between the activity of ZnCu and ZnO/Cu model catalysts for methanol synthesis is reported, highlighting a synergy of Cu andZnO at the interface that facilitates methenol synthesis via formate intermediates.