Co-sensitized TiO2 electrodes with different quantum dots for enhanced hydrogen evolution in photoelectrochemical cells

被引：8

作者：

Cerdan-Pasaran, Andrea ^{[1
]}

Lopez-Luke, Tzarara ^{[2
]}

Zarazua, Isaac ^{[3
]}

De la Rosa, Elder ^{[5
]}

Fuentes-Ramirez, Rosalba ^{[4
]}

Sanal, K. C. ^{[1
]}

Alatorre-Ordaz, Alejandro ^{[4
]}

机构：

[1] Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66451, Nuevo Leon, Mexico

[2] Univ Michoacana, Inst Invest Met & Mat, Edificio U,Ciudad Univ, Morelia 58030, Michoacan, Mexico

[3] Univ Guadalajara, Ctr Univ Los Lagos, Dept Ciencias Exactas & Tecnol, Lagos De Moreno 47460, Jalisco, Mexico

[4] Univ Guanajuato, Div Ciencias Nat & Exactas, Noria Alta S-N, Guanajuato 36050, GTO, Mexico

[5] Univ De La Salle Bajio, Campus Campestre, Leon 37150, GTO, Mexico

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2019年 / 49卷 / 05期

关键词：

Photoelectrochemical hydrogen generation; Colloidal quantum dots; Cadmium chalcogenides; HIGHLY EFFICIENT; NANOWIRE ARRAYS; WATER; SEMICONDUCTOR; CDS; HETEROSTRUCTURES; PERFORMANCE; GENERATION; COMPOSITE; FILMS;

D O I：

10.1007/s10800-019-01299-x

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A comparative study of hydrogen evolution in devices based on cadmium chalcogenides quantum dots (CdS, CdSe and CdTe) and its combinations, sensitizing TiO2 was carried out. A maximum photocurrent of 2.7 mA cm(-2) at 0 V bias, and a solar-to-hydrogen (STH) conversion efficiency of 0.9%, was obtained with CdSe QDs due to its wide absorption range. The co-sensitized device with CdS-CdSe QDs showed a higher photocurrent of 3.9 mA cm(-2) with an STH of 1.2%. The improvement in hydrogen generation for electrodes sensitized with CdS in combination with CdSe or CdTe QDs, was attributed to the increased light absorption and appropriate band alignment for the enhanced charge transport.

引用

页码：475 / 484

页数：10

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