Studying Charge Transport and Light Induced Structural Alterations in Ni/NiO Core-Shell Co-Catalysts on SrTiO3 for Solar Hydrogen Evolution

Crystalline–amorphous Ni–Ni(OH)2 core–shell assembled nanosheets exhibit outstanding electrocatalytic activity and stability for hydrogen evolution under alkaline conditions.

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Superior co-catalysis by bimetallic nanostructure for TiO2 photocatalysis

Journal of Photocatalysis ◽

10.2174/2665976x01999201022194257 ◽

2020 ◽

Vol 01 ◽

Author(s):

Bonamali Pal ◽

Anila Monga ◽

Aadil Bathla

Keyword(s):

Visible Light ◽

Catalytic Performance ◽

Transition Metal Catalysts ◽

Core Shell ◽

Structural Morphology ◽

Tio2 Photocatalysis ◽

Co Catalysts ◽

Bimetallic Nanocomposites ◽

Bimetallic Nanostructure ◽

Bimetallic Nanostructures

Background:: Bimetallic nanocomposites have currently gained significant importance for enhanced catalytic applications relative to monometallic analogues. The synergistic interactions modified electronic and optical properties in the bimetallic (M1@M2) structural morphology e.g., core-shell /alloy nanostructures resulted in a better co-catalytic performance for TiO2 photocatalysis. Objective:: Hence, this article discusses the preparation, characterization, and co-catalytic activity of different bimetallic nanostructures namely, Cu@Zn, Pd@Au, Au@Ag, and Ag@Cu, etc. Method:: These bimetallic co-catalysts deposited on TiO2 possess the ability to absorb visible light due to surface plasmonic absorption and are also expected to display the new properties due to synergy between two distinct metals. As a result, they reveal the highest level of activity than the monometal deposited TiO2. Result:: Their optical absorption, emission, charge carrier dynamics, and surface structural morphology are explained for the improved photocatalytic activity of M1@M2 loaded TiO2 for the hydrogenation of certain organic compounds e.g., quinoline, crotonaldehyde, and 1,3-dinitrobenzene, etc. under UV/ visible light irradiation. Conclusion:: It revealed that the use of bimetallic core@shell co-catalyst for hydrogenation of important industrial organics by M1@M2-TiO2 nanocomposite demonstrates beneficial reactivity in many instances relative to conventional transition metal catalysts.

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CoMn phosphide encapsulated in nitrogen-doped graphene for electrocatalytic hydrogen evolution over a broad pH range

Chemical Communications ◽

10.1039/d0cc07523j ◽

2021 ◽

Author(s):

Jingjing Liu ◽

Wenyao Li ◽

Zhe Cui ◽

Jiaojiao Li ◽

Fang Yang ◽

...

Keyword(s):

Hydrogen Evolution ◽

Core Shell ◽

Nitrogen Doped ◽

Nitrogen Doped Graphene ◽

Doped Graphene ◽

Ph Range ◽

Excellent Stability

A core–shell CoMn-P@NG heterostructure electrode demonstrated impressive performance of hydrogen evolution over a broad pH range and maintained excellent stability.

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Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

Nature Communications ◽

10.1038/s41467-021-24060-5 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Dingwang Huang ◽

Lintao Li ◽

Kang Wang ◽

Yan Li ◽

Kuang Feng ◽

...

Keyword(s):

Hydrogen Evolution ◽

Water Splitting ◽

Low Cost ◽

Solar Hydrogen ◽

Onset Potential ◽

Term Stability ◽

Long Term Stability ◽

Solar Water Splitting ◽

Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

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