Ru/In Dual-Single Atoms Modulated Charge Separation for Significantly Accelerated Photocatalytic H_2 Evolution in Pure Water

Huiping Peng; Tang Yang; Haiping LinYong XuZihan WangQinghua ZhangShangheng LiuHongbo GengLin GuCheng WangXing FanWenxing ChenXiaoqing Huang

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Ru/In Dual-Single Atoms Modulated Charge Separation for Significantly Accelerated Photocatalytic H_2 Evolution in Pure Water

机译：Ru/In Dual-Single Atoms Modulated Charge Separation for Significantly Accelerated Photocatalytic H_2 Evolution in Pure Water

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Photocatalytic hydrogen production is a prospective technology to solve theenergy crisis and environmental problems. However, it is still challenging toproduce hydrogen from photocatalytic water splitting on a large scale withouta sacrificial agent and cocatalyst. Here, it is demonstrated that the dual dopingof Ru/In single atoms on TiO_2 (Ru-In SA/TiO_2) can modulate the separationof photogenerated carriers during the photocatalytic splitting of pure water.Impressively, the H_2 evolution rate of Ru-In SA/TiO_2 reaches 174.1 μmol h~(?1),which is 6, 18, and 53 times higher than those of the Ru single-atom decoratedTiO_2, In single-atom decorated TiO_2, and pristine TiO_2, respectively. Moreimportantly, Ru-In SA/TiO_2 outperforms most of the reported photocatalystsfor photocatalytic water splitting in the absence of a sacrificial agent. Detailedinvestigations reveal that the decoration of Ru/In dual-single atoms leads to theremarkable increase of Ti~(3+) and enrichment of oxygen vacancies, which acceleratethe charge separation. In particular, the femtosecond transient absorptionspectroscopy suggests that the doping of Ru single atom promotes the transferof photogenerated electrons from TiO_2 into Ru, while the doping of In singleatom enhances the transfer of photogenerated holes from the TiO_2 valenceband to In single atoms, as a result of an efficient electron-hole separation. Thiswork not only provides an efficient photocatalyst for H_2 production throughpure water splitting in the absence of a sacrificial agent, but also promotesfundamental research on catalyst design and modification.

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来源
《Advanced energy materials》 |2022年第43期|2201688.1-2201688.8|共8页
作者
Huiping Peng; Tang Yang; Haiping LinYong XuZihan WangQinghua ZhangShangheng LiuHongbo GengLin GuCheng WangXing FanWenxing ChenXiaoqing Huang;
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作者单位

State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005, P. R. China;

Beijing Key Laboratory of Construction Tailorable Advanced FunctionalMaterials and Green ApplicationsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100190, P. R. China;

Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow UniversitySuzhou 215123, P. R. ChinaSchool of Physics and Information TechnologyShaanxi Normal UniversityXi’an 710119, P. R. ChinaGuangzhou Key Laboratory of Low-Dimensional Materials and EnergyStorage DevicesCollaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006, P. R. ChinaInstitute of PhysicsChinese Academy of SciencesBeijing 100190, P. R. ChinaSchool of Materials EngineeringChangshu Institute of TechnologyChangshu 215500, P. R. China;

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Ru/In dual-single-atoms; photocatalytic; pure water splitting; Ti3+; efficient charge separation;

Ru/In Dual-Single Atoms Modulated Charge Separation for Significantly Accelerated Photocatalytic H_2 Evolution in Pure Water

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