Photochemical Diodes for Simultaneous Bias-Free Glycerol Valorization and Hydrogen Evolution

被引：38

作者：

Lin, Jia-An ^{[1
,2
]}

Roh, Inwhan ^{[1
,2
]}

Yang, Peidong ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Liquid Sunlight Alliance, Berkeley, CA 94720 USA

[3] Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[5] Kavli Energy Nanosci Inst, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2023年 / 145卷 / 24期

关键词：

TIO2 NANOWIRE ARRAYS; BIPOLAR MEMBRANES; PHOTOELECTROCHEMICAL PROPERTIES; ARTIFICIAL PHOTOSYNTHESIS; CATALYSTS; LAYER; CHALLENGES; OXIDATION;

D O I：

10.1021/jacs.3c01982

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Artificial photosynthesis offers a route to producingclean fuelenergy. However, the large thermodynamic requirement for water splittingalong with the corresponding sluggish kinetics for the oxygen evolutionreaction (OER) limits its current practical application. Here, weoffer an alternative approach by replacing the OER with the glyceroloxidation reaction (GOR) for value-added chemicals. By using a Siphotoanode, a low GOR onset potential of -0.05 V vs RHE anda photocurrent density of 10 mA/cm(2) at 0.5 V vs RHE canbe reached. Coupled with a Si nanowire photocathode for the hydrogenevolution reaction (HER), the integrated system yields a high photocurrentdensity of 6 mA/cm(2) with no applied bias under 1 sun illuminationand can run for over 4 days under diurnal illumination. The demonstrationof the GOR-HER integrated system provides a framework for designingbias-free photoelectrochemical devices at appreciable currents andestablishes a facile approach to artificial photosynthesis.

引用

页码：12987 / 12991

页数：5

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