DICP OpenIR
Role of Pt Loading in the Photocatalytic Chemistry of Methanol on Rutile TiO2(110)
Hao, Qunqing1,2; Wang, Zhiqiang1,3; Wang, Tianjun1; Ren, Zefeng1; Zhou, Chuanyao1; Yang, Xueming1,4
Corresponding AuthorZhou, Chuanyao(chuanyaozhou@dicp.ac.cn) ; Yang, Xueming(xmyang@dicp.ac.cn)
KeywordPt cocatalyst titanium dioxide hydrogen production charge separation methanol to methoxy conversion
Source PublicationACS CATALYSIS
2019
ISSN2155-5435
DOI10.1021/acscatal.8b03359
Volume9Issue:1Pages:286-294
Funding ProjectNational Natural Science Foundation of China[21573225] ; National Natural Science Foundation of China[21688102] ; National Natural Science Foundation of China[21703164] ; National Key Research and Development Program of China[2016YFA0200602] ; National Key Research and Development Program of China[2018YFA0208703] ; Strategic Pilot Science and Technology Project[XDB17000000] ; Youth Innovation Promotion Association of CAS[2017224]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordMOLECULAR-HYDROGEN FORMATION ; PT-AU CLUSTERS ; METHYL FORMATE ; BOND SCISSION ; SURFACE ; TIO2 ; DECOMPOSITION ; WATER ; ADSORPTION ; DISSOCIATION
AbstractAs a cocatalyst, Pt is well-known for accepting photoexcited electrons and lowering the overpotential of hydrogen production in photocatalysis, being responsible for the enhanced photocatalytic efficiency. Despite the above existing knowledge, the adsorption of reactants on the Pt/photon-absorber (for example, Pt/TiO2) interface, a prerequisite to understand the photocatalytic chemistry, is extremely difficult to investigate mainly because of the complexity of the powdered material and solution environment. Combining ultrahigh vacuum and well-ordered single crystals, we study the photocatalytic chemistry of methanol on Pt-loaded rutile TiO2(110) using temperature-programmed desorption (TPD) and ultraviolet photoelectron spectroscopy (UPS). Despite the same photocatalytic chemical products (i.e., formaldehyde and surface hydrogen species) as on Pt-free TiO2(110), the subsequent chemistry of surface hydrogen species and the photocatalytic reaction rate are much different. The bridging hydroxyls desorb as water molecules around 500 K on the Pt-free TiO2(110) surface, and by contrast, this desorption channel disappears completely and water and molecular hydrogen desorb at much lower temperature (<300 K) after Pt deposition, which can prevent the recombination of hydrogen species with formaldehyde. More importantly, methanol dissociates into methoxy at the Pt/TiO2(110) interface, which is crucial in the photocatalytic chemistry of methanol on TiO2 surfaces because methoxy is a more effective hole scavenger than methanol itself. The photocatalytic chemical reaction rate is increased by nearly 1 order of magnitude after 0.12 monolayer Pt deposition. This work suggests that Pt loading can promote the dissociation of methanol into methoxy and lower the desorption barrier of molecular hydrogen, which may work cooperatively with separating photoexcited charges to enhance the photocatalytic efficiency. Our work implies the importance of the cocatalysts in affecting the surface structure and adsorption of reactants and products and then improving the photoactivity, in addition to the well known role in charge separation.
Language英语
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Strategic Pilot Science and Technology Project ; Strategic Pilot Science and Technology Project ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
WOS IDWOS:000455286600031
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/166271
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhou, Chuanyao; Yang, Xueming
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
2.Sci & Technol Surface Phys & Chem Lab, POB 9-35, Jiangyou 621908, Sichuan, Peoples R China
3.Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Shaanxi, Peoples R China
4.Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Hao, Qunqing,Wang, Zhiqiang,Wang, Tianjun,et al. Role of Pt Loading in the Photocatalytic Chemistry of Methanol on Rutile TiO2(110)[J]. ACS CATALYSIS,2019,9(1):286-294.
APA Hao, Qunqing,Wang, Zhiqiang,Wang, Tianjun,Ren, Zefeng,Zhou, Chuanyao,&Yang, Xueming.(2019).Role of Pt Loading in the Photocatalytic Chemistry of Methanol on Rutile TiO2(110).ACS CATALYSIS,9(1),286-294.
MLA Hao, Qunqing,et al."Role of Pt Loading in the Photocatalytic Chemistry of Methanol on Rutile TiO2(110)".ACS CATALYSIS 9.1(2019):286-294.
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