Activating earth-abundant electrocatalysts for efficient, low-cost hydrogen evolution/oxidation: sub-monolayer platinum coatings on titanium tungsten carbide nanoparticles

2016 ◽  
Vol 9 (10) ◽  
pp. 3290-3301 ◽  
Author(s):  
Sean T. Hunt ◽  
Maria Milina ◽  
Zhenshu Wang ◽  
Yuriy Román-Leshkov
Keyword(s):  
Tungsten Carbide ◽  
Hydrogen Evolution ◽  
Low Cost ◽  
Surface Coatings ◽  
Oxidation Reactions ◽  
Acidic Media ◽  
Platinum Surface ◽  
Earth Abundant

Decorating titanium tungsten carbide nanoparticles with sub-monolayer platinum surface coatings yields efficient and stable catalysts for hydrogen evolution/oxidation reactions in acidic media.

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.

scholarly journals Investigation of Co3Mo and Co6Mo7 Binary Alloys as Electrocatalysts for Hydrogen Evolution Reaction in Acidic Media

2020 ◽  
Author(s):  
youyi sun ◽  
Alexey Ganin
Keyword(s):  
Hydrogen Evolution ◽  
Metal Alloys ◽  
Alkaline Media ◽  
Price Of Stability ◽  
Applied Potential ◽  
Acidic Media ◽  
Free Standing ◽  
Current Decay ◽  
Earth Abundant ◽  
Current Densities

Metal alloys have become ubiquitous choice as catalysts for electrochemical hydrogen evolution in alkaline media. However, scarce and expensive Pt remains the key electrocatalyst in acidic electrolytes making the search for earth-abundant and cheaper alternatives appealing. Herein, we present a facile and efficient synthetic route towards polycrystalline Co<sub>3</sub>Mo and Co<sub>6</sub>Mo<sub>7</sub> metal alloys that achieve competitively low overpotentials of 115 mV and 160 mV at 10 mA cm<sup>–2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub>. Both alloys outperform Co and Mo metals which showed significantly higher overpotentials and lower current densities when tested under identical conditions. However, the low overpotential in Co<sub>3</sub>Mo comes at the price of stability. It rapidly becomes inactive when tested under applied potential bias. On the other hand, Co<sub>7</sub>Mo<sub>6</sub> retains the current density over time without the evidence of current decay. The findings demonstrate that even in free-standing form and without nanostructuring polycrystalline bimetallic electrocatalysts could challenge the dominance of Pt in the acidic media if the ways for improving their stability were found.

In situ synthesis of novel Cu2CO3(OH)2 decorated 2D TiO2 nanosheets with efficient photocatalytic H2 evolution activity

2018 ◽  
Vol 47 (2) ◽  
pp. 348-356 ◽  
Author(s):  
Hao Xu ◽  
Dongsheng Dai ◽  
Songsong Li ◽  
Lei Ge ◽  
Yangqin Gao
Keyword(s):  
Hydrogen Evolution ◽  
Low Cost ◽  
In Situ Synthesis ◽  
H2 Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Co Catalysts ◽  
Tio2 Nanosheets ◽  
Earth Abundant ◽  
Photocatalytic H2 Evolution

Semiconductor-based photocatalytic hydrogen evolution from water with earth-abundant and low cost co-catalysts has attracted much attention.

2D ultrathin CoP modified MnxCd1−xS with controllable band structure and robust photocatalytic performance for hydrogen generation

2019 ◽  
Vol 48 (39) ◽  
pp. 14783-14791 ◽  
Author(s):  
Ran Chen ◽  
Yanhui Ao ◽  
Chao Wang ◽  
Peifang Wang
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
High Efficiency ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Light Irradiation ◽  
Earth Abundant

Considerable efforts have been directed towards constructing high-efficiency, earth-abundant and low-cost photocatalysts for hydrogen evolution under visible light irradiation.

Preparation of Porous CoS2 Nanostructures for Highly Efficient Electrocatalytic Hydrogen Evolution

2019 ◽  
Vol 944 ◽  
pp. 643-649
Author(s):  
Ka Wang ◽  
Hai Zeng Song ◽  
Wei Lan Guo ◽  
Shan Cheng Yan
Keyword(s):  
Hydrogen Evolution ◽  
Low Cost ◽  
Environmental Issues ◽  
Catalytic Performance ◽  
Carbon Cloth ◽  
Facile Hydrothermal Method ◽  
Highly Efficient ◽  
Earth Abundant ◽  
Hydrogen Evolution Reactions ◽  
A Current

In response to global energy and environmental issues, development of efficient and robust earth-abundant electrocatalysts for hydrogen evolution reaction is particularly meaningful. In this study, a facile hydrothermal method is developed to synthesize porous CoS2 nanostructures by using sulfur powder and thiourea as sulfur sources on carbon cloths for highly efficient hydrogen evolution reactions. The huge load of CoS2 on carbon cloth，their unique porous nanostructures equiped CoS2 nanomaterials with excellent electrocatalytic properties. The remarkable HER catalytic performance was achieved with -67 mV at a current density -10 mA cm-2 and the Tafel slope 62 mV dec-1 in 0.5 M H2SO4 solution. The overpotential of HER only lost 2 mV after 1000 cycles with remarkable stability. I think this work opens up a low cost and scalable route to fabricate transition metal-based materials for application in electrocatalysis.

scholarly journals Investigation of Co3Mo and Co6Mo7 Binary Alloys as Electrocatalysts for Hydrogen Evolution Reaction in Acidic Media

2020 ◽  
Author(s):  
youyi sun ◽  
Alexey Ganin
Keyword(s):  
Hydrogen Evolution ◽  
Metal Alloys ◽  
Alkaline Media ◽  
Price Of Stability ◽  
Applied Potential ◽  
Acidic Media ◽  
Free Standing ◽  
Current Decay ◽  
Earth Abundant ◽  
Current Densities

Metal alloys have become ubiquitous choice as catalysts for electrochemical hydrogen evolution in alkaline media. However, scarce and expensive Pt remains the key electrocatalyst in acidic electrolytes making the search for earth-abundant and cheaper alternatives appealing. Herein, we present a facile and efficient synthetic route towards polycrystalline Co<sub>3</sub>Mo and Co<sub>6</sub>Mo<sub>7</sub> metal alloys that achieve competitively low overpotentials of 115 mV and 160 mV at 10 mA cm<sup>–2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub>. Both alloys outperform Co and Mo metals which showed significantly higher overpotentials and lower current densities when tested under identical conditions. However, the low overpotential in Co<sub>3</sub>Mo comes at the price of stability. It rapidly becomes inactive when tested under applied potential bias. On the other hand, Co<sub>7</sub>Mo<sub>6</sub> retains the current density over time without the evidence of current decay. The findings demonstrate that even in free-standing form and without nanostructuring polycrystalline bimetallic electrocatalysts could challenge the dominance of Pt in the acidic media if the ways for improving their stability were found.

Hierarchical Cu2S hollow nanowire arrays for highly efficient hydrogen evolution reaction

2021 ◽  
Author(s):  
Ning Xie ◽  
Dong-Dong Ma ◽  
Yu-Lin Wu ◽  
Xintao Wu ◽  
Qi-Long Zhu
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Low Cost ◽  
Nanowire Arrays ◽  
Highly Efficient ◽  
Highly Active ◽  
Earth Abundant

Exploiting the highly active and low-cost electrocatalysts based on earth-abundant elements for hydrogen evolution reaction (HER) is an extremely desired but challenging task. Herein, we present a facile and economical...

Interface-tuned Mo-based nanospheres for efficient oxygen reduction and hydrogen evolution catalysis

2020 ◽  
Vol 10 (19) ◽  
pp. 6713-6722
Author(s):  
Qingyu Li ◽  
Dingding Kong ◽  
Guanhua Yang ◽  
Yezheng Cai ◽  
Qichang Pan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Reduction Reaction ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Acidic Media ◽  
Fuel Cell Application ◽  
Earth Abundant

Developing earth-abundant materials for efficient oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) catalysis in both alkaline and acidic media is of significance for hydrogen fuel cell application.

Large-scale synthesis of stable mesoporous black TiO2 nanosheets for efficient solar-driven photocatalytic hydrogen evolution via an earth-abundant low-cost biotemplate

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50506-50512 ◽  
Author(s):  
Kaifu Zhang ◽  
Wei Zhou ◽  
Xiangcheng Zhang ◽  
Yang Qu ◽  
Lei Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Large Scale ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Tio2 Nanosheets ◽  
Black Tio2 ◽  
Earth Abundant ◽  
Large Scale Synthesis

Stable mesoporous black anatase TiO2 nanosheets (MBTNs) are synthesized via an earth-abundant low-cost biotemplate method combined with an ethanediamine encircling process, and exhibit excellent solar-driven photocatalytic hydrogen generation.

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