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Surface iodine and pyrenyl-graphdiyne co-modified Bi catalysts for highly efficient CO_(2) electroreduction in acidic electrolyte

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Nano Research 2024年第4期17卷 2381-2387页

作者： Min Zhang Juan Wang Xin Rong Xiu-Li Lu Tong-Bu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

CO_(2) electroreduction to formic acid/formate would contribute to alleviating the energy and climate *** work reports a Bi-based catalyst derived from the in-situ electroreduction of Bi_(2)O_(2)CO_(3) modified with iodine and pyrenyl-graphdiyne(PGDY)on the surface for efficient electroreduction of CO_(2) in acidic electrolyte,with a high partial current density of 98.71 mA·cm^(-2) and high Faradaic efficiency(FE)>90%over the potential range from^(-1).2 to-1.5 V *** hydrogen electrode(RHE),as well as the long-term operational stability over 240 h without degradation in H-type *** results and density function theory calculations show that the synergistic effect of surface iodine and PGDY is responsible for this active and extremely stable process of CO_(2) electroreduction via lowering the energy barriers for formation of*OCHO intermediate,suppressing the competitive HER by enhancing the concentration of both K+and CO_(2) at reaction interface,as well as preventing the dissolution and re-deposition of active Bi atoms on surface during catalytic *** work provides new insight into designing highly active and stable electrocatalysts for CO_(2) reduction.

关键词： CO_(2) reduction electrocatalysis Bi-based catalysts acidic electrolyte

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Electrifying the future:the advances and opportunities of electrocatalytic carbon dioxide reduction in acid

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Science China Chemistry 2023年第12期66卷 3426-3442页

作者： Runhao Zhang Haoyuan Wang Yuan Ji Qiu Jiang Tingting Zheng Chuan Xia Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

Transforming carbon dioxide(CO_(2))into products using renewable electricity is a crucial and captivating quest for a green and circular *** with commonly used alkali electrolytes,acidic media for electrocatalytic CO_(2) reduction(CO_(2)RR)boasts several advantages,such as high carbon utilization efficiency,high overall energy utilization rate,and low carbonate formation,making it a compelling choice for industrial ***,the acidic CO_(2)RR also struggles with formidable hurdles,encompassing the fierce competition with the hydrogen evolution reaction,the low CO_(2) solubility and availability,and the suboptimal performance of *** review provides a comprehensive overview of the CO_(2)RR in acidic *** elucidating the underlying regulatory mechanism,we gain valuable insights into the fundamental principles governing the acidic CO_(2)***,we examine cutting-edge strategies aimed at optimizing its performance and the roles of reactor engineering,especially membrane electrode assembly reactors,in facilitating scalable and carbon efficient ***,we present a forward-looking perspective,highlighting the promising prospects of acidic CO_(2)RR research in ushering us towards a carbon-neutral society.

关键词： electrocatalytic CO_(2)reduction acidic electrolyte microenvironment alkali metal cations electrolysers

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Self-supported high-entropy alloy electrocatalyst for highly efficient H_(2) evolution in acid condition

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Journal of Materiomics 2020年第4期6卷 736-742页

作者： Peiyan Ma Mingming Zhao Long Zhang Heng Wang Junfeng Gu Yuchen Sun Wei Ji Zhengyi Fu School of Chemistry Chemical Engineering and Life scienceWuhan University of TechnologyWuhan CityHubei ProvincePR China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan CityHubei ProvincePR China Engineering Research Center of Environmental Materials and Membrane Technology School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan CityHubei ProvincePR China

Developing non-precious catalysts as Pt substitutes for electrochemical hydrogen evolution reaction(HER)with superior stability in acidic electrolyte is of critical importance for large-scale,low-cost hydrogen production from ***,we report a CoCrFeNiAl high-entropy alloy(HEA)electrocatalyst with self-supported structure synthesized by mechanical alloying and spark plasma sintering(SPS)*** HEA after HF treatment and in situ electrochemical activation for 4000 cycles of cyclic voltammetry(HF-HEAa2)presents favourable activity with overpotential of 73 mV to reach a current density of 10 mA cm^(2) and a Tafel slope of 39.7 mV dec*** alloy effect of Al/Cr with Co/Fe/Ni at atomic level,high-temperature crystallization,as well as consolidation by SPS endow CoCrFeNiAl HEA with high stability in 0.5 M H2SO4 *** superior performance of HF-HEAa2 is related with the presence of metal hydroxides/oxides groups on HEA.

关键词： loy Hydrogen evolution reaction Electrocatalysts acidic electrolyte Stability

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Platinum single-atom catalyst with self-adjustable valence state for large-current-density acidic water oxidation

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eScience 2022年第1期2卷 102-109页

作者： Hui Su Mikhail A.Soldatov Victor Roldugin Qinghua Liu National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230029AnhuiPR China The Smart Materials Research Institute Southern Federal University344090Sladkova 178/24Rostov-on-DonRussia

The design of active acidic oxygen evolution reaction(OER)catalysts is of paramount importance to achieve efficient large-current-density industrial hydrogen fuel production via water ***,we develop a Pt-based catalyst with high electrochemical activity for the OER in acidic conditions under a large *** achieve this by modulating the electronic structure of Pt into a high-valence,electron-accessible Pt1^((2.4+δ)+)(δ=0-0.7)state during the *** electron-accessible Pt1^((2.4+δ)+)single-site catalyst can effectively maintain a large OER current density of 120 mA cm^(-2)for more than 12 h in 0.5 M H_(2)SO_(4) at a low overpotential of 405 mV,and it shows a high mass activity of~3350 A gmetal^(-1)at 10 mA cm^(-2) current density and 232 mV *** in situ synchrotron radiation infrared and X-ray absorption spectroscopies,we directly observe in an experiment that a key(*O)-Pt_(1)-C_(2)N_(2) intermediate is produced by the potential-driven structural optimization of square pyramidal Pt_(1)-C_(2)N_(2) moieties;this highly favors the dissociation of H_(2)O over Pt1^(2.4+δ)^(+)sites and prevents over-oxidation and dissolution of the active sites.

关键词： Oxygen evolution reaction acidic electrolyte In situ characterization

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