Articles

Effects of Co-Catalysts and Wavelength of Light on the Products of Photocatalytic Methanol Reforming: An Operando NMR Study

  • YE Man ,
  • YANG Yi-ning ,
  • ZHANG Ran ,
  • WANG Xue-lu ,
  • YAO Ye-feng
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  • Shanghai Key Laboratory of Magnetic Resonance, College of Physics and Materials Science, East China Normal University, Shanghai 200062, China

Received date: 2019-03-29

  Online published: 2019-05-24

Abstract

In operando nuclear magnetic resonance (in operando NMR) was used to investigate the effects of co-catalysts and wavelength of light on the products of photocatalytic methanol reforming, as well as the hydrogen production rate, in a real solid-liquid reaction environment. The results demonstrated that adding co-catalysts (i.e., anatase TiO2 modified with different isolated noble metal atoms) could affect the yields of reforming products to some extents, but had only little effects on the reaction kinetics. And the wavelength of light also had a large effect on the yields. It was concluded that the co-catalysts might play important roles in providing the redox capacity and the synergistic effects between methanol oxidation and hydrogen production.

Cite this article

YE Man , YANG Yi-ning , ZHANG Ran , WANG Xue-lu , YAO Ye-feng . Effects of Co-Catalysts and Wavelength of Light on the Products of Photocatalytic Methanol Reforming: An Operando NMR Study[J]. Chinese Journal of Magnetic Resonance, 2019 , 36(4) : 490 -501 . DOI: 10.11938/cjmr20192727

References

[1] MUGGLI D S, ODLAND M J, SCHMIDT L R. Effect of trichloroethylene on the photocatalytic oxidation of methanol on TiO2[J]. J Catal, 2001, 203(1):51-63.
[2] PALMISANO G, AUGUGLIARO V, PAGLIARO M, et al. Photocatalysis:A promising route for 21st century organic chemistry[J]. Chem Commun, 2007, 38(33):3425-3437.
[3] WASMUS S, KUVER A. Methanol oxidation and direct methanol fuel cells:A selective review[J]. J Electroanal Chem, 1999, 461(1/2):14-31.
[4] KIM S, CHOI W. Dual photocatalytic pathways of trichloroacetate degradation on TiO2:Effects of nanosized platinum deposits on kinetics and mechanism[J]. J Phys Chem B, 2002, 106(51):13311-13317.
[5] MORAND R, LOPEZ C, Koudelkahep M, et al. Photoelectrochemical behavior in low-conductivity media of nanostructured TiO2 films deposited on interdigitated microelectrode arrays[J]. J Phys Chem, 2002, b106(29):7218-7224.
[6] XU C B, YANG W S, GUO Q, et al. Photoinduced decomposition of formaldehyde on a TiO2(110) surface, assisted by bridge-bonded oxygen atoms[J]. J Phys Chem Lett, 2013, 4(16):2668-2673.
[7] WANG T J, HAO Q Q, WANG Z Q, et al. Deuterium kinetic isotope effect in the photocatalyzed dissociation of methanol on TiO2(110)[J]. J Phys Chem C, 2018, 122(46):26512-26518.
[8] XU C B, WANG R M, XO F, et al. Enhanced hydrogen production from methanol photolysis on a formate-modified rutile-TiO2(110) surface[J]. J Phys Chem C, 2018, 122(25):13774-13781.
[9] SETVIN M, SHI X, HULVA J, et al. Methanol on anatase TiO2(101):Mechanistic insights into photocatalysis[J]. ACS Catal, 2017, 7(10):7081-7091.
[10] TILOCCA A, SELLONI A. Methanol adsorption and reactivity on clean and hydroxylated anatase (101) surfaces[J]. J Phys Chem B, 2004, 108(50):19314-19319.
[11] XU C B, YANG W S, GUO Q, et al. Molecular hydrogen formation from photocatalysis of methanol on anatase-TiO2(101)[J]. J Am Chem Soc, 2014, 136(2):602-605.
[12] BENNETT D A, CARGNELLO M, GORDON T R, et al. Thermal and photochemical reactions of methanol on nanocrystalline anatase TiO2 thin films[J]. Phys Chem Chem Phys, 2015, 17(26):17190-17201.
[13] SETVIN M, ASCHAUER U, SCHEIBER P, et al. Reaction of O2 with subsurface oxygen vacancies on TiO2 anatase (101)[J]. Science, 2013, 341(6149):988-991.
[14] HE Y B, DULUB O, CHENG H Z, et al. Evidence for the predominance of subsurface defects on reduced anatase TiO2(101)[J]. Phys Rev Lett, 2009, 102(10):106105.
[15] WANG C Y, GROENZIN H, SHULTZ M J. Surface characterization of nanoscale TiO2 film by sum frequency generation using methanol as a molecular probe[J]. J Phys Chem B, 2004, 108(1):265-272.
[16] HENDERSON M A, OTERO-TAPIA S, CASTRO M E, et al. The chemistry of methanol on the TiO2(110) surface:the influence of vacancies and coadsorbed species[J]. Faraday Discuss, 1999, 114(2):399-405.
[17] BATES S, GILLAN M, KRESSE G. Adsorption of methanol on TiO2(110):A first-principles investigation[J]. J Phys Chem B, 1998, 102(11):2017-2026.
[18] LIU W Q, SONG Y H, WANG X L, et al. The mechanism study of photocatalytic methanol reforming by operando nuclear magnetic resonance spectroscopy[J]. Chinese J Magn Reson, 2019, 36(3):298-308. 刘文卿, 宋艳红, 王雪璐, 等. 光催化甲醇重整机理的原位核磁共振研究[J]. 波谱学杂志, 2019, 36(3):298-308.
[19] MURAKAMI N, MAHANEY O O P, TORIMOTO T, et al. Photoacoustic spectroscopic analysis of photoinduced change in absorption of titanium(IV) oxide photocatalyst powders:A novel f..easible technique for measurement of defect density[J]. Chem Phys Lett, 2006, 426(1-3):204-208.
[20] HERMAN G S, DOHNÁLEK Z, RUZYCKI N, et al. Experimental investigation of the interaction of water and methanol with anatase-TiO2(101)[J]. Hist Eur Ideas, 2003, 21(107):s169-176.
[21] WANG C Y, GROENZIN H, SHULTZ M J. Comparative study of acetic acid, methanol, and water adsorbed on anatase TiO2 probed by sum frequency generation Spectroscopy[J]. J Am Chem Soc, 2005, 127(27):9736-9744.
[22] LANG X F, LIANG Y H, SUN L L, et al. Interplay between methanol and anatase TiO2(101) surface:The effect of subsurface oxygen vacancy[J]. J Phys Chem C, 2017, 121(11):6072-6080.
[23] TAO F F, CROZIER P A. Atomic-scale observations of catalyst structures under reaction conditions and during catalysis[J]. Chem Rev, 2016, 47(19):3487-3539.
[24] XING J, CHEN J F, LI Y H, et al. Stable isolated metal atoms as active sites for photocatalytic hydrogen evolution[J]. Eur J Chem, 2014, 20(8):2088-2088.
[25] WANG X L, LIU W, YU Y Y, et al. Operando NMR spectroscopic analysis of proton transfer in heterogeneous photocatalytic reactions[J]. Nat Commun, 2016, 7:11918.
[26] SONG Y H, LIU W Q, YAO Y F. Gaining Higher NMR signal enhancement with parahydrogen-induced polarization[J]. Chinese J Magn Reson, 2015, 32(3):470-480. 宋艳红, 刘文卿, 姚叶锋. 仲氢诱导极化增强的核磁共振实验条件优化[J]. 波谱学杂志, 2015, 32(3):470-480.
[27] MELVIN A A, ILLATH K, DAS T, et al. M-Au/TiO2(M=Ag, Pd, and Pt) nanophotocatalyst for overall solar water splitting:role of interfaces[J]. Nanoscale, 2015, 7:13477-13488.
[28] YIN Z, WANG Y, SONG C Q, et al. Hybrid Au-Ag nanostructures for enhanced plasmon-driven catalytic selective hydrogenation through visible light irradiation and surface-enhanced Raman scattering[J]. J Am Chem Soc, 2018, 140(3):864-867.
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