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Performance enhancement and active sites identification of Cu-Cd bimetallic oxide derived catalysts for electrochemical co_(2) reduction

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Journal of Energy Chemistry 2024年第4期91卷 50-58页

作者： Cai Wang Xin Hu Bairong Chen Houan Ren Xiaoyu Wang Yilin Zhang Xinyu Chen Yuping Liu Qingxin Guan Wei Li State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Adv.Energy Mater.Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China

The development of earth-abundant electrocatalysts with high performance for electrochemical co_(2)reduction(ECR)is of great ***-based catalysts have been widely investigated for ECR due to their unique ability to generate various carbonaceous products,but directing selectivity toward one certain product and identifying the real active sites during ECR are still full of ***,after the incorporation of CdO into CuO,the Cu_(0.5)Cd_(0.5)-O catalyst achieves a 10.3-fold enhancement for co selectivity in comparison with CuO,and a co faradic efficiency nearly 90%with a current density around20 mA cm^(-2)could maintain at least 60 ***,a wide co/H_(2)ratio(0.07-10)is reached on Cu_(x)Cd_(1-x)-O catalysts by varying the Cu/Cd ratio,demonstrating the potential of syngas production using such *** results of ex situ XRD,XPS,and in situ Raman reveal that the real active sites of Cu_(0.5)Cd_(0.5)-O catalysts for co production during ECR reaction are the reconstructed mixed phases of CuCd alloy and Cdco_(3).In situ FTIR and theoretical calculations further implicate the presence of Cd related species promotes the co desorption and inhibits the H_(2)evolution,thus leading to an enhanced co generation.

关键词： co_(2)reduction Cu-Cd bimetallic Real active sites co production

A general and facile calcination method to synthesize single-site catalysts for highly efficient electrochemical co_(2) reduction

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Nano Research 2024年第5期17卷 3895-3901页

作者： Rui Sui Bingyan Wang Yongsheng Wang Jiajing Pei Wei Zhu Wenxing Chen Chunhui Li Ailing Sun Zhongbin Zhuang Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China college of Chemistry and Green Catalysis Center Zhengzhou UniversityZhengzhou 450001China State Key Lab of Organic-Inorganic composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

The electrochemical co_(2) reduction reaction(co_(2)RR)has received widespread attention as a promising method for producing sustainable chemicals and mitigating the global ***,we demonstrate a general and facile synthetic route for the metal-nitrogen-carbon(M-N-C)type catalyst by simply calcinating metal acetate and urea with commercial carbon black,which have potential application in co_(2)*** synthesized Ni-NC-600 catalyst has the structure of single Ni atom coordinated with one N atom and three C atoms(Ni-N_(1)C_(3)),which is suggested by X-ray absorption *** Ni-NC-600 catalyst exhibits high co_(2)RR catalytic performance and a high co Faraday efficiency above 98%in a wide potential range from-0.7 to-1.3 V(*** hydrogen electrode(RHE)),superior to most of the reported Ni-N-C *** work has developed a facile strategy to synthesize high performance co_(2)RR catalyst.

关键词： nickel single atom catalyst co_(2)reduction reaction co production electrocatalyst

Nitrogen-doped Zn–Ni oxide for electrochemical reduction of carbon dioxide in sea water

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Rare Metals 2021年第11期40卷 3117-3124页

作者： Shuai Zhang Xin-Tong Gao Peng-Fei Hou Tie-Rui Zhang Peng Kang Key Laboratory of Photochemical conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Chemistry Beijing University of Chemical TechnologyBeijing 100029China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China

Nitrogen-doped Zn-Ni oxide nanoparticles prepared by ammonia treatment are efficient electrocatalysts for co_(2) reduction to *** single-phase nanostructures of N-Zn-Ni oxide nanoparticles exhibited high electrocatalytic co_(2) reduction activity with co Faradaic efficiency of 91.5% and partial current density of 3.2 mA·cm^(-2) at-0.95 V(*** hydrogen electrode’RHE) in NaCl aqueous ***’ N-Zn-Ni oxides catalyst achieved co Faradaic efficiency over 89%at—0.8 V(***) in natural seawater’ much better than the co_(2) reduction activity of benchmark Ag/C catalysts in seawater’ and demonstrated strong tolerance to several metal ion impurities with retained co *** notable reactivity toward co_(2) reduction and contamination-tolerance is attributed to peculiar synergistic effect from binary Zn-Ni oxide and nitrogen doping.

关键词： Electrochemical co_(2)reduction Nitrogendoped Zn–Ni oxide Seawater Heavy metal ions-tolerance electrocatalyst co production

Variable valence Mo^(5+)/Mo^(6+)ionic bridge in hollow spherical g-C_(3)N_(4)/Bi_(2)MoO_(6) catalysts for promoting selective visible light-driven co_(2)photoreduction into co

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Journal of Energy Chemistry 2023年第5期80卷 361-372,I0009页

作者： Wenjie He Yuechang Wei Jing Xiong Zhiling Tang Yingli Wang Xiong Wang Hui Xu Xiao Zhang Xiaolin Yu Zhen Zhao Jian Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBejing 102249China Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of ChemistryChinese Academy of SciencesBeijing 100190China

Herein,the catalysts of ultrathin g-C_(3)N_(4)surface-modified hollow spherical Bi2MoO6(g-C_(3)N_(4)/Bi2MoO6,abbreviated as CN/BMO)were fabricated by the co-solvothermal *** variable valence Mo^(5+)/Mo^(6+)ionic bridge in CN/BMO catalysts can boost the rapid transfer of photogenerated electrons from Bi2MoO6to g-C_(3)N_(4).And the synergy effect of g-C_(3)N_(4)and Bi2MoO6components remarkably enhance co_(2)adsorption ***/BMO-2 catalyst has the best performances for visible light-driven co_(2)reduction compared with single Bi2MoO6and g-C_(3)N_(4),i.e.,its amount and selectivity of co product are 139.50μmol g-1and 96.88%for 9 h,*** on the results of characterizations and density functional theory calculation,the photocatalytic mechanism for co_(2)reduction is *** high-efficient separation efficiency of photogenerated electron-hole pairs,induced by variable valence Mo^(5+)/Mo^(6+)ionic bridge,can boost the rate-limiting steps(coOH*-to-co*and co*desorption)of selective visible light-driven co_(2)conversion into *** inspires the establishment of efficient photocatalysts for co_(2)conversion.

关键词： g-C_(3)N_(4) Bi_(2)MoO_(6) Mo^(5+)/Mo^(6+)ionic bridge co_(2)photoconversion co production

Optimized Process and Design:Incomplete combustion in FCC Regenerators to Produce co

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China Petroleum Processing & Petrochemical Technology 2022年第4期24卷 64-75页

作者： Yi Cai Li Shiyu Liu Zhiqiang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Ningxia Ruiyuan Petrochemical co. LtdYinchuan 750004China

The catalyst regeneration process running under the partial oxidation mode in traditional fluid catalytic cracking(FCC)units needs a carbon monoxide(co)boiler to burn the flue gas,resulting in a large volume of co_(2) *** this study,the performance of a set of industrial serial-type FCC regenerators and the changes in flue gas composition were analyzed by establishing a model of the regenerators and the flue gas energy recovery *** the value of utilizing co,based on the simulation,this paper proposes two schemes for maximizing co content in the flue gas of *** two sets of optimal process operating parameters were obtained using a genetic *** with the original process,the co contents of flue gas in the two optimized processes increased to 6.6%and 12.5%,co_(2) emissions were reduced by 48.4%and 96.7%,and the costs of co production were 0.57$/m^(3) and 0.84$/m^(3),respectively.

关键词： FCC regenerators rigorous process simulation co production co_(2)utilization

Chalcogen heteroatoms doped nickel-nitrogen-carbon single-atom catalysts with asymmetric coordination for efficient electrochemical co_(2) reduction

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Chinese Journal of Catalysis 2024年第9期64卷 54-65页

作者： Jialin Wang Kaini Zhang Ta Thi Thuy Ng Yiqing Wang Yuchuan Shi Daixing Wei Chung-Li Dong Shaohua Shen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Tamkang UniversityNew Taipei City 25137TaiwanChina

The electronic configuration of central metal atoms in single-atom catalysts(SACs)is pivotal in electrochemical co_(2) reduction reaction(eco_(2)RR).Herein,chalcogen heteroatoms(e.g.,S,Se,and Te)were incorporated into the symmetric nickel-nitrogen-carbon(Ni-N_(4)-C)configuration to obtain Ni-X-N_(3)-C(X:S,Se,and Te)SACs with asymmetric coordination presented for central Ni *** these obtained Ni-X-N_(3)-C(X:S,Se,and Te)SACs,Ni-Se-N_(3)-C exhibited superior eco_(2)RR activity,with co selectivity reaching~98% at-0.70 V versus reversible hydrogen electrode(RHE).The Zn-co_(2) battery integrated with Ni-Se-N_(3)-C as cathode and Zn foil as anode achieved a peak power density of 1.82 mW cm^(-2) and maintained remarkable rechargeable stability over 20 ***-situ spectral investigations and theoretical calculations demonstrated that the chalcogen heteroatoms doped into the Ni-N_(4)-C configuration would break coordination symmetry and trigger charge redistribution,and then regulate the intermediate behaviors and thermodynamic reaction pathways for eco_(2)***,for Ni-Se-N_(3)-C,the introduced Se atoms could significantly raise the d-band center of central Ni atoms and thus remarkably lower the energy barrier for the rate-determining step of ^(*)coOH formation,contributing to the promising eco_(2)RR performance for high selectivity co production by competing with hydrogen evolution reaction.

关键词： Electrochemical co_(2) reduction reaction Chalcogen heteroatoms Single-atom catalysts Asymmetric coordination co production