Steering Unit Cell Dipole and Internal Electric Field by Highly Dispersed Er atoms Embedded into NiO for Efficient CO_2 Photoreduction

Zhenzhen Yu; Kai Yang; Changlin YuKangqiang LuWeiya HuangLiang XuLaixi ZouSibo WangZhong ChenJun HuYang HouYongfa Zhu

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Steering Unit Cell Dipole and Internal Electric Field by Highly Dispersed Er atoms Embedded into NiO for Efficient CO_2 Photoreduction

机译：Steering Unit Cell Dipole and Internal Electric Field by Highly Dispersed Er atoms Embedded into NiO for Efficient CO_2 Photoreduction

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The weak internal electric field over antiferromagnetic materials makesit difficult to facilitate charge migration to the surface, leading to lowperformance for CO_2 photoreduction. The asymmetry and polarizationrefinement structure can induce an intensive internal electricfield. Herein, n-type NiO is synthesized with highly dispersed erbiumatoms doping (Er/NiO_(1?x)) via a molten salt method to accelerate chargeseparation and transfer. The doping of Er atoms can distort the unit cellof NiO to alter the symmetry and enhance the polarization and internalelectric field, in favor of efficient separation of charges. In addition,the highly dispersed erbium-doped n-type NiO can largely boost theadsorption and activation of CO_2, and weaken the energy barrier for CO_2photoreduction reaction. Benefiting from the unique features, an optimaldoping ratio (≈2%) with erbium atoms achieves a remarkable elevationin carrier separation efficiency and excellent CO_2 photoreduction performancewith a CO yield of 368 μmol g~(?1) h~(?1) in the Ru(byp)_3~(2+)/ethanolamineelectron-agent generating system, which is 26.3-fold and 3.9-fold relativeto traditional NiO and n-type NiO, respectively. The obtained Er/NiO_(1?x)photocatalyst and the unit cell dipole governing the internal electric fieldopens a new window for CO_2 photoreduction in antiferromagneticmaterials.

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来源
《Advanced functional materials》 |2022年第28期|2111999.1-2111999.10|共10页
作者
Zhenzhen Yu; Kai Yang; Changlin YuKangqiang LuWeiya HuangLiang XuLaixi ZouSibo WangZhong ChenJun HuYang HouYongfa Zhu;
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作者单位

School of Chemistry and Chemical EngineeringJiangxi University of Science and TechnologyGanzhou, Jiangxi 341000, P. R. China;

School of Chemical EngineeringKey Laboratory of Petrochemical PollutionProcess and Control, Guangdong ProvinceGuangdong University of Petrochemical TechnologyMaomingGuangdong 525000, P. R. China;

State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou 350002, P. R. ChinaSchool of Materials Science and EngineeringNanyang Technological University50 Nanyang Avenue, Singapore 639798, SingaporeSchool of Chemistry EngineeringNorthwest UniversityXi’an 639798, P. R. ChinaKey Laboratory of Biomass Chemical Engineeringof Ministry of EducationCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027, P. R. ChinaDepartment of ChemistryTsinghua UniversityBeijing 100084, P. R. China;

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CO_2 photoreduction; erbium doping; internal electric field; NiO; unit cell dipole;

Steering Unit Cell Dipole and Internal Electric Field by Highly Dispersed Er atoms Embedded into NiO for Efficient CO_2 Photoreduction

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