Promotion of atomic hydrogen recombination as an alternative to electron trapping for the role of metals in the photocatalytic production of H2

被引:111
作者
Joo, Ji Bong [1 ]
Dillon, Robert [1 ]
Lee, Ilkeun [1 ]
Yin, Yadong [1 ]
Bardeen, Christopher J. [1 ]
Zaera, Francisco [1 ]
机构
[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA
基金
美国国家科学基金会;
关键词
photocatalysis; hydrogen production; gold-titania; time-resolved fluorescence; core-shell nanostructures; CARRIER DYNAMICS; TIO2; WATER; MECHANISM; SURFACE; NIO; EVOLUTION; PHOTOLUMINESCENCE; CRYSTALLINITY; DECOMPOSITION;
D O I
10.1073/pnas.1405365111
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The production of hydrogen from water with semiconductor photocatalysts can be promoted by adding small amounts of metals to their surfaces. The resulting enhancement in photocatalytic activity is commonly attributed to a fast transfer of the excited electrons generated by photon absorption from the semiconductor to the metal, a step that prevents deexcitation back to the ground electronic state. Here we provide experimental evidence that suggests an alternative pathway that does not involve electron transfer to the metal but requires it to act as a catalyst for the recombination of the hydrogen atoms made via the reduction of protons on the surface of the semiconductor instead.
引用
收藏
页码:7942 / 7947
页数:6
相关论文
共 47 条
  • [1] The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation
    Anpo, M
    Takeuchi, M
    [J]. JOURNAL OF CATALYSIS, 2003, 216 (1-2) : 505 - 516
  • [2] INVESTIGATION OF THE MECHANISM OF HYDROGEN EVOLUTION DURING PHOTOCATALYTIC WATER DECOMPOSITION ON METAL-LOADED SEMICONDUCTOR POWDERS
    BABA, R
    NAKABAYASHI, S
    FUJISHIMA, A
    HONDA, K
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (10) : 1902 - 1905
  • [3] Photocatalytic water treatment: solar energy applications
    Bahnemann, D
    [J]. SOLAR ENERGY, 2004, 77 (05) : 445 - 459
  • [4] BOND GC, 1969, SURF SCI, V18, P11, DOI 10.1016/0039-6028(69)90264-7
  • [5] Development of NiO-based thin film structures as efficient H2 gas sensors operating at room temperatures
    Brilis, Nikos
    Foukaraki, Chara
    Bourithis, Eleftherios
    Tsamakis, Dirnitris
    Giannoudakos, Aggelos
    Kornpitsas, Michael
    Xenidou, Theodora
    Boudouvis, Andreas
    [J]. THIN SOLID FILMS, 2007, 515 (24) : 8484 - 8489
  • [6] Photoinduced reactivity of titanium dioxide
    Carp, O
    Huisman, CL
    Reller, A
    [J]. PROGRESS IN SOLID STATE CHEMISTRY, 2004, 32 (1-2) : 33 - 177
  • [7] Semiconductor-based Photocatalytic Hydrogen Generation
    Chen, Xiaobo
    Shen, Shaohua
    Guo, Liejin
    Mao, Samuel S.
    [J]. CHEMICAL REVIEWS, 2010, 110 (11) : 6503 - 6570
  • [8] SPILLOVER IN HETEROGENEOUS CATALYSIS
    CONNER, WC
    FALCONER, JL
    [J]. CHEMICAL REVIEWS, 1995, 95 (03) : 759 - 788
  • [9] Correlating the excited state relaxation dynamics as measured by photoluminescence and transient absorption with the photocatalytic activity of Au@TiO2 core-shell nanostructures
    Dillon, Robert J.
    Joo, Ji-Bong
    Zaera, Francisco
    Yin, Yadong
    Bardeen, Christopher J.
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2013, 15 (05) : 1488 - 1496
  • [10] PLATINUM TITANIUM-DIOXIDE CATALYSTS - A PHOTOCONDUCTIVITY STUDY OF ELECTRON-TRANSFER FROM THE ULTRAVIOLET-ILLUMINATED SUPPORT TO THE METAL AND OF THE INFLUENCE OF HYDROGEN
    DISDIER, J
    HERRMANN, JM
    PICHAT, P
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1983, 79 : 651 - 660