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

In the present work we demonstrate a record photocurrent density of 5.6 mA cm-2 at 0 VRHE for WSe2 photocathodes coated with an effective/earth abundant catalyst - ammonium thiomolybdate (NH4)2Mo3S13 (ATM). The photocurrent density can be tuned by optimizing the WSe2 film thickness. The features of this new combination (NH4)2Mo3S13 / WSe2 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.

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

10.26434/chemrxiv.7440227.v1 ◽

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

In the present work we demonstrate a record photocurrent density of 5.6 mA cm-2 at 0 VRHE for WSe2 photocathodes coated with an effective/earth abundant catalyst - ammonium thiomolybdate (NH4)2Mo3S13 (ATM). The photocurrent density can be tuned by optimizing the WSe2 film thickness. The features of this new combination (NH4)2Mo3S13 / WSe2 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.

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WS(1−x)Sex Nanoparticles Decorated Three-Dimensional Graphene on Nickel Foam: A Robust and Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction

Nanomaterials ◽

10.3390/nano8110929 ◽

2018 ◽

Vol 8 (11) ◽

pp. 929 ◽

Cited By ~ 10

Author(s):

Sajjad Hussain ◽

Kamran Akbar ◽

Dhanasekaran Vikraman ◽

Rana Afzal ◽

Wooseok Song ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Large Scale ◽

Nickel Foam ◽

Transition Metal Dichalcogenides ◽

Three Dimensional ◽

Cost Effective ◽

Highly Efficient ◽

Highly Active ◽

Earth Abundant

To find an effective alternative to scarce, high-cost noble platinum (Pt) electrocatalyst for hydrogen evolution reaction (HER), researchers are pursuing inexpensive and highly efficient materials as an electrocatalyst for large scale practical application. Layered transition metal dichalcogenides (TMDCs) are promising candidates for durable HER catalysts due to their cost-effective, highly active edges and Earth-abundant elements to replace Pt electrocatalysts. Herein, we design an active, stable earth-abundant TMDCs based catalyst, WS(1−x)Sex nanoparticles-decorated onto a 3D porous graphene/Ni foam. The WS(1−x)Sex/graphene/NF catalyst exhibits fast hydrogen evolution kinetics with a moderate overpotential of ~−93 mV to drive a current density of 10 mA cm−2, a small Tafel slope of ~51 mV dec−1, and a long cycling lifespan more than 20 h in 0.5 M sulfuric acid, which is much better than WS2/NF and WS2/graphene/NF catalysts. Our outcomes enabled a way to utilize the TMDCs decorated graphene and precious-metal-free electrocatalyst as mechanically robust and electrically conductive catalyst materials.

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Earth abundant materials beyond transition metal dichalcogenides: A focus on electrocatalyzing hydrogen evolution reaction

Nano Energy ◽

10.1016/j.nanoen.2019.01.017 ◽

2019 ◽

Vol 58 ◽

pp. 244-276 ◽

Cited By ~ 74

Author(s):

Peng Yu ◽

Fengmei Wang ◽

Tofik Ahmed Shifa ◽

Xueying Zhan ◽

Xiaoding Lou ◽

...

Keyword(s):

Transition Metal ◽

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Transition Metal Dichalcogenides ◽

Earth Abundant ◽

Metal Dichalcogenides

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Passivation of the Surface of Transition Metal Dichalcogenides with Catalysts for Solar Hydrogen Evolution

10.29363/nanoge.nfm.2018.141 ◽

2018 ◽

Author(s):

Farabi Bozheyev ◽

Fanxing Xi ◽

Dennis Friedrich ◽

Marat Kaikanov ◽

Alexander Tikhonov ◽

...

Keyword(s):

Transition Metal ◽

Hydrogen Evolution ◽

Transition Metal Dichalcogenides ◽

Solar Hydrogen ◽

Metal Dichalcogenides

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

Energy & Environmental Science ◽

10.1039/c5ee00769k ◽

2015 ◽

Vol 8 (5) ◽

pp. 1585-1593 ◽

Cited By ~ 54

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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