Efficient charge transfer at a homogeneously distributed (NH4)2Mo3S13/WSe2 heterojunction for solar hydrogen evolution

2019 ◽  
Vol 7 (17) ◽  
pp. 10769-10780 ◽  
Author(s):  
Farabi Bozheyev ◽  
Fanxing Xi ◽  
Paul Plate ◽  
Thomas Dittrich ◽  
Sebastian Fiechter ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Solar Hydrogen ◽  
Earth Abundant ◽  
Efficient Charge

Efficient charge transfer is achieved by coating WSe2 photocathodes with an earth abundant photocatalyst – ammonium thiomolybdate (NH4)2Mo3S13.

Efficient Charge Transfer at a Homogeneously Distributed (NH4)2Mo3S13 / WSe2 Heterojunction for Solar Hydrogen Evolution

2019 ◽  
Author(s):  
Farabi Bozheyev ◽  
Fanxing Xi ◽  
Paul Plate ◽  
Thomas Dittrich ◽  
Sebastian Fiechter ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Large Scale ◽  
Transition Metal Dichalcogenides ◽  
Photocurrent Density ◽  
New Combination ◽  
Solar Hydrogen ◽  
Earth Abundant ◽  
Efficient Charge ◽  
New Finding ◽  
Metal Dichalcogenides

<p></p><p>In the present work we demonstrate a record photocurrent density of 5.6 mA cm<sup>-2</sup> at 0 V<sub>RHE</sub> for WSe<sub>2</sub> photocathodes coated with an effective/earth abundant catalyst - ammonium thiomolybdate (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> (ATM). The photocurrent density can be tuned by optimizing the WSe<sub>2</sub> film thickness. The features of this new combination (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> / WSe<sub>2</sub> and its performance for solar hydrogen evolution is discussed in the manuscript. Our new finding is that the ATM can be used as a photocatalyst, not only as an electrocatalyst known up to date. The results further expand and develop the field of the transition metal dichalcogenides especially in the context of the solar hydrogen evolution. This work is an important milestone towards large scale photocathodes using earth abundant elements.</p><p></p>

Efficient Charge Transfer at a Homogeneously Distributed (NH4)2Mo3S13 / WSe2 Heterojunction for Solar Hydrogen Evolution

2019 ◽  
Author(s):  
Farabi Bozheyev ◽  
Fanxing Xi ◽  
Paul Plate ◽  
Thomas Dittrich ◽  
Sebastian Fiechter ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Large Scale ◽  
Transition Metal Dichalcogenides ◽  
Photocurrent Density ◽  
New Combination ◽  
Solar Hydrogen ◽  
Earth Abundant ◽  
Efficient Charge ◽  
New Finding ◽  
Metal Dichalcogenides

<p></p><p>In the present work we demonstrate a record photocurrent density of 5.6 mA cm<sup>-2</sup> at 0 V<sub>RHE</sub> for WSe<sub>2</sub> photocathodes coated with an effective/earth abundant catalyst - ammonium thiomolybdate (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> (ATM). The photocurrent density can be tuned by optimizing the WSe<sub>2</sub> film thickness. The features of this new combination (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> / WSe<sub>2</sub> and its performance for solar hydrogen evolution is discussed in the manuscript. Our new finding is that the ATM can be used as a photocatalyst, not only as an electrocatalyst known up to date. The results further expand and develop the field of the transition metal dichalcogenides especially in the context of the solar hydrogen evolution. This work is an important milestone towards large scale photocathodes using earth abundant elements.</p><p></p>

Efficient Charge Transfer at a Homogeneously Distributed (NH4)2Mo3S13 / WSe2 Heterojunction for Solar Hydrogen Evolution

2018 ◽  
Author(s):  
Farabi Bozheyev ◽  
Fanxing Xi ◽  
Thomas Dittrich ◽  
Sebastian Fiechter ◽  
Klaus Ellmer
Keyword(s):  
Hydrogen Evolution ◽  
Large Scale ◽  
Transition Metal Dichalcogenides ◽  
Photocurrent Density ◽  
New Combination ◽  
Solar Hydrogen ◽  
Earth Abundant ◽  
Efficient Charge ◽  
New Finding ◽  
Metal Dichalcogenides

<p></p><p>In the present work we demonstrate a record photocurrent density of 5.6 mA cm<sup>-2</sup> at 0 V<sub>RHE</sub> for WSe<sub>2</sub> photocathodes coated with an effective/earth abundant catalyst - ammonium thiomolybdate (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> (ATM). The photocurrent density can be tuned by optimizing the WSe<sub>2</sub> film thickness. The features of this new combination (NH<sub>4</sub>)<sub>2</sub>Mo<sub>3</sub>S<sub>13</sub> / WSe<sub>2</sub> and its performance for solar hydrogen evolution is discussed in the manuscript. Our new finding is that the ATM can be used as a photocatalyst, not only as an electrocatalyst known up to date. The results further expand and develop the field of the transition metal dichalcogenides especially in the context of the solar hydrogen evolution. This work is an important milestone towards large scale photocathodes using earth abundant elements.</p><p></p>

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

scholarly journals Silicon nanowire arrays coupled with cobalt phosphide spheres as low-cost photocathodes for efficient solar hydrogen evolution

2015 ◽  
Vol 51 (53) ◽  
pp. 10742-10745 ◽  
Author(s):  
Xiao-Qing Bao ◽  
M. Fatima Cerqueira ◽  
Pedro Alpuim ◽  
Lifeng Liu
Keyword(s):  
Hydrogen Evolution ◽  
Low Cost ◽  
Silicon Nanowire ◽  
Hollow Spheres ◽  
Nanowire Arrays ◽  
Photoelectrochemical Performance ◽  
Solar Hydrogen ◽  
Cobalt Phosphide ◽  
Silicon Nanowire Arrays ◽  
Earth Abundant

Low-cost photocathodes consisting of silicon nanowire arrays coupled with hollow spheres of the emerging earth-abundant cobalt phosphide catalysts are fabricated, which exhibit good photoelectrochemical performance toward the solar-driven H2 evolution.

In-situ C–H activation-derived polymer@TiO2 p-n heterojunction for efficient photocatalytic hydrogen evolution

2021 ◽  
Author(s):  
Yu-Qin Xing ◽  
Zhi-Rong Tan ◽  
Jingzhao Cheng ◽  
Zhao-Qi Shen ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Inorganic Semiconductors ◽  
Efficient Charge ◽  
Semiconductor Heterojunctions

Semiconductor heterojunctions benefiting from efficient charge transfer and separation have been widely used in photocatalysis. Herein, heterojunctions based on polymeric and inorganic semiconductors, namely PyOT@TiO2, have been successfully constructed via...

Extracting large photovoltages from a-SiC photocathodes with an amorphous TiO2 front surface field layer for solar hydrogen evolution

2015 ◽  
Vol 8 (5) ◽  
pp. 1585-1593 ◽  
Author(s):  
Ibadillah A. Digdaya ◽  
Lihao Han ◽  
Thom W. F. Buijs ◽  
Miro Zeman ◽  
Bernard Dam ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Front Surface ◽  
Photocurrent Density ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Field Layer ◽  
Surface Field ◽  
Earth Abundant ◽  
Amorphous Tio2 ◽  
Amorphous Sic

A p–i–n junction photocathode made from 110 nm (p/i) amorphous SiC and an (n) TiO2 top layer leads to an onset potential of +0.8 VRHE and a photocurrent density of 8.3 mA cm−2 at 0 VRHE using only earth abundant materials.

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