Free-base Porphyrin Polymer for Bifunctional Electrochemical Water Splitting

10.26434/chemrxiv.14454681.v1 ◽

2021 ◽

Author(s):

Yulu Ge ◽

Zhenhua Lyu ◽

Mariana Marcos Hernandez ◽

Dino Villagran

Keyword(s):

Water Splitting ◽

Water Oxidation ◽

Precious Metals ◽

Cost Effective ◽

Economic Feasibility ◽

Free Base ◽

Bifunctional Electrocatalyst ◽

Energy Demands ◽

Production Of Hydrogen ◽

Electrochemical Water Splitting

Projected future global energy demands require sustainable energy sources as alternatives to the current world dependence on hydrocarbon fuels. The production of hydrogen and oxygen gas from water is a promising approach. Currently, water-splitting electrolyzers require precious metals as electrocalysts because they are active and stable. Yet, replacement of these precious metals by cost-effective alternatives is necessary for the economic feasibility of this approach. Here, we describe a molecular based polymeric approach that effectively removes the need to use any metal to electrochemically split water. The incorporation of free-base porphyrin units into a 2D network structure yields a stable and efficient bifunctional electrocatalyst for water oxidation and water reduction that can operate for days at competitive overpotentials comparable to metal based ones. <br><br><br>

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A ruthenium-based catalyst on carbon electrodes for electrochemical water splitting

10.26434/chemrxiv-2021-t7mfj ◽

2021 ◽

Author(s):

Lin Li ◽

Biswanath Das ◽

Ahibur Rahaman ◽

Andrey Shatskiy ◽

Fei Ye ◽

...

Keyword(s):

Water Splitting ◽

Water Oxidation ◽

State Of The Art ◽

Cost Effective ◽

Molecular Catalyst ◽

Electrolysis Cells ◽

Multi Walled Carbon Nanotubes ◽

Energy Economy ◽

Electrochemical Water Splitting ◽

Walled Carbon Nanotubes

Electrochemical water splitting constitutes one of the most promising strategies for converting water into hydrogen-based fuels, and this technology is predicted to play a key role in our transition towards a carbon-neutral energy economy. To enable the design of cost-effective electrolysis cells based on this technology, new and more efficient anodes with augmented water splitting activity and stability will be required. Herein, we report an active molecular Ru-based catalyst for electrochemically-driven water oxidation and two simple methods for preparing anodes by attaching this catalyst onto multi-walled carbon nanotubes. The anodes modified with the molecular catalyst were characterized by a broad toolbox of microscopy and spectroscope techniques, and interestingly no RuO2 formation was detected during electrocatalysis over 4 h. These results demonstrate that the herein presented strategy can be used to prepare anodes that rival the performance of state-of-the-art metal oxide anodes.

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Rational design of cobalt–chromium layered double hydroxide as a highly efficient electrocatalyst for water oxidation

Journal of Materials Chemistry A ◽

10.1039/c6ta04052g ◽

2016 ◽

Vol 4 (29) ◽

pp. 11292-11298 ◽

Cited By ~ 78

Author(s):

Chenlong Dong ◽

Xiaotao Yuan ◽

Xin Wang ◽

Xiangye Liu ◽

Wujie Dong ◽

...

Keyword(s):

Water Splitting ◽

Oxygen Evolution ◽

Layered Double Hydroxide ◽

Water Oxidation ◽

High Performance ◽

Rational Design ◽

Cost Effective ◽

Cobalt Chromium ◽

Electrochemical Water Splitting ◽

Double Hydroxide

The design of a high performance, stable and cost-effective electrocatalyst for oxygen evolution is crucial for H2 production from electrochemical water splitting.

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Mesoporous LiTiPO4F Nanoparticles: A New Stable and High performance Bifunctional Electrocatalyst for Electrochemical Water Splitting

Surfaces and Interfaces ◽

10.1016/j.surfin.2021.101188 ◽

2021 ◽

pp. 101188

Author(s):

Srinivasa N ◽

Rangaswamy P ◽

Yogeeshwari RT ◽

Manjunatha C ◽

Ashoka S

Keyword(s):

Water Splitting ◽

High Performance ◽

Bifunctional Electrocatalyst ◽

Electrochemical Water Splitting

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Iron and Nitrogen Co-doped CoSe2 Nanosheet Arrays for Robust Electrocatalytic Water Oxidation

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00113b ◽

2021 ◽

Author(s):

Di Li ◽

Yingying Xing ◽

Changjian Zhou ◽

Yikai Lu ◽

Shengjie Xu ◽

...

Keyword(s):

Water Splitting ◽

Water Oxidation ◽

Energy Barrier ◽

Large Scale ◽

Scale Production ◽

Reaction Energy ◽

Large Scale Production ◽

Nanosheet Arrays ◽

Production Of Hydrogen ◽

Co Doped

The high reaction energy barrier of the oxygen evolution reaction (OER) extremely reduces the efficiency of water splitting, which is not conducive to large-scale production of hydrogen. Due to the...

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Fe, Ni-codoped W18O49 grown on nickel foam as bifunctional electrocatalyst for boosted water splitting

Dalton Transactions ◽

10.1039/d1dt01468d ◽

2021 ◽

Author(s):

Guojuan Hai ◽

Jianfeng Huang ◽

Liyun Cao ◽

Koji Kajiyoshi ◽

Long Wang ◽

...

Keyword(s):

Renewable Energy ◽

Water Splitting ◽

High Performance ◽

Solvothermal Method ◽

Nickel Foam ◽

Energy Systems ◽

Cost Effective ◽

Bifunctional Catalysts ◽

Renewable Energy Systems ◽

Bifunctional Electrocatalyst

Designing cost-effective bifunctional catalysts with high-performance and durability is of great significance for the renewable energy systems. Herein, a typical Fe, Ni-codoped W18O49/NF was prepared via a simple solvothermal method....

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Tuning the cationic ratio of Fe1CoxNiyP integrated on Vertically aligned reduced graphene oxide array via electroless plating as efficient self-supported bifunctional electrocatalyst for water splitting

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4052533 ◽

2021 ◽

pp. 1-33

Author(s):

Kaiming Guo ◽

Firdoz Shaik ◽

Jine Yang ◽

Bin Jiang

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Water Splitting ◽

Electroless Plating ◽

Cost Effective ◽

Bifunctional Electrocatalyst ◽

Reduced Graphene ◽

Wide Ph Range ◽

Vertically Aligned ◽

Ph Range

Abstract Water splitting is considered as a potential sustainable and green technology for producing mass hydrogen and oxygen. A cost-effective self-supported stable electrocatalyst with excellent electrocatalytic performance in a wide pH range is greatly required for water splitting. This work reports on the synthesis and anchoring of Fe1CoxNiyP nanoparticles on vertically aligned reduced graphene oxide array (VrGO) via electroless plating. The catalytic activity of Fe1CoxNiyP nanoparticles is tuned finely by tailoring the cationic ratio of Co and Ni. Fe1Co2Ni1P/VrGO exhibits the lowest overpotential (58 and 110 mV) at 10 mA cm−2 and lowest tafel slope (31 and 33 mV dec−1) for hydrogen evolution reaction in 1.0 M KOH and 0.5 M H2SO4 respectively. Fe1Co1Ni2P/VrGO exhibits the lowest overpotential (173 mV) at 10 mA cm−2 with lowest tafel slope (47 mV dec-1) for oxygen evolution reaction. The enhanced performance of the electrocatalyst is attributed to improved electrical conductivity, synergistic effects and beneficial electronic states caused by the appropriate atomic ratio of Co and Ni in the bifunctional electrocatalyst. This study helps to explore the effect of variable cationic ratio in the cost-effective ternary iron group metal phosphides electrocatalysts to achieve enhanced electrocatalytic performance for water splitting in a wide pH range.

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Hierarchical Fe-Mn binary metal oxide core-shell nano-polyhedron as bifunctional electrocatalyst for efficient water splitting

Dalton Transactions ◽

10.1039/d1dt03048e ◽

2021 ◽

Author(s):

Yun-Wu Li ◽

Shi-Kun Su ◽

Cai-Zhen Yue ◽

Jun Shu ◽

Pengfang Zhang ◽

...

Keyword(s):

Metal Oxide ◽

Water Splitting ◽

Oxygen Evolution ◽

Energy Crisis ◽

Core Shell ◽

Bifunctional Electrocatalyst ◽

Binary Metal ◽

Bifunctional Electrocatalysts ◽

Binary Metal Oxide ◽

Electrochemical Water Splitting

Electrochemical water splitting is convinced as one of the most promising solutions to combat energy crisis. The exploitation of efficient hydrogen and oxygen evolution reactions (HER/OER) bifunctional electrocatalysts is undoubtedly...

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