A Low‐Cost Ni–Mo Electrocatalyst for Highly Efficient Hydrogen and Oxygen Evolution Reaction

Pan, Peiyao; Zeng, Qingle; Li, Xiaoxiao; Liu, Chao; Zeng, Jinming; Liang, Tongxiang; Qi, Xiaopeng

doi:10.1002/ente.202300118

Cited by 5 publications

(1 citation statement)

References 55 publications

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“…If the semicircle diameter is large, the electrocatalyst has high charge transfer resistance (R CT ) and shows poor HER activity. 69,70 Ni@CuS/SGCN composite material had the lowest faradaic resistance for the HER as it has the most minor semicircle curvature compared to the 6% Ni@CuS, CuS, and SGCN. It means Ni@CuS/SGCN composite material had faster electron transfer and more minor resistance for HER.…”

Section: Resultsmentioning

confidence: 99%

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Mehrose,

Javed,

Qamar

et al. 2023

J. Electrochem. Soc.

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The contemporary world faces significant challenges with the depletion of non-renewable energy sources and the escalation of global temperatures. Using H2 as an energy source is a sustainable, renewable, and environmentally friendly alternative. Electrochemical water splitting using an efficient electrocatalyst is an optimistic approach for hydrogen production. The primary concern is the development of a durable, cost-effective, and highly efficient bifunctional electrocatalyst to enhance electrochemical water splitting. The present investigation employs CuS as the electrocatalyst, followed by the implementation of two techniques, doping and composite material synthesis, to enhance its electrocatalytic characteristics. CuS samples doped with varying weight percentages of Ni (2, 4, 6, 8, and 10 wt.%) and a composite material of 6% Ni@CuS with SGCN were synthesized using the co-precipitation method. The electrocatalysts were studied by characterization techniques such as SEM, EDX, FTIR, and XRD. Doping and composite material synthesis enhance the electrochemical water-splitting activity, as LSV, CV, EIS, and Chronopotentiometry analyses demonstrated. The electrochemical water splitting process exhibits maximum performance when utilizing Ni@CuS/SGCN, resulting in a low overpotential of 380 mV for OER and 178 mV for HER, achieving a current density of 10 mA cm−2. The findings indicate that composite Ni@CuS/SGCN can potentially serve as an electrocatalyst for water splitting.

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Section: Resultsmentioning

confidence: 99%

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Mehrose,

Javed,

Qamar

et al. 2023

J. Electrochem. Soc.

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Nickel and Molybdenum Composites Decorated Nitrogen‐Doped Carbon Catalysts from Spent Coffee Grounds for Alkaline Hydrogen Evolution

Ge,

Zhang,

Meng

et al. 2024

ChemPlusChem

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Biomass‐derived materials can help develop efficient, environmentally friendly and cost‐effective catalysts, thereby improving the sustainability of hydrogen production. Herein, we propose a simple method to produce nickel and molybdenum composites decorated spent coffee grounds (SCG) as an efficient catalyst, SCG(200)@NiMo, for electrocatalytic hydrogen production. The porous carbon supporter derived form SCG provided a larger surface, prevented aggregation during the high temperature pyrolysis, optimized the electronic structure by N and provided a reducing atmosphere for the oxides reduction to form heterojunctions. The sieved SCG showed obvious improvement of HER performance and enhanced conductivity and long‐term durability. The obtained SCG(200)@NiMo exhibits the highest electrochemical performance for the hydrogen evolution reaction process, as evidenced by the overpotential of only 127 mV at a current density of ɳ10 and 97.7% catalytic activity retention even after 12 h of operation. This work may stimulate further exploration of efficient electrocatalysts derived from biomass.

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Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

Shanmugam,

Santhana Krishnan,

Eswaran

et al. 2024

Energy Tech

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The design and development of effective electrocatalysts containing nonprecious materials for oxygen evolution reaction (OER) in seawater splitting remains a significant challenge for large‐scale industrial hydrogen production. Nonprecious bimetallic oxide‐constructed catalysts are utmost promising candidates to obtain boosting electrochemical water oxidation performance. Herein, a transition bimetallic oxide nanostructure electrocatalyst as NiMoO4 vertically standing nanosheet over the nickel foam substrate (NiMoO4/NF) for electrochemical water oxidation process in alkaline fresh/simulated seawater conditions is presented. NiMoO4 nanostructure on NF substrate is successfully obtained using a straightforward hydrothermal reaction route and thermal annealing processes. The surface morphology with elemental characteristics of the resultant NiMoO4/NF sample exposes highly homogenous vertical standing nanosheets assembled on the NF surface. The electrochemical water oxidation performance of the as‐prepared electrodes demonstrates the function of diverse hydrothermal reaction times (3, 6, and 9 h) in fresh and simulated seawater electrolyte conditions. In alkaline seawater electrolyte conditions, optimal hydrothermal reaction time‐assisted NiMoO4/NF‐6 h electrocatalyst possesses significant OER electrocatalytic actives compared to the other samples. Similarly, NiMoO4/NF‐6 h catalyst exhibits a small overpotential of 429 mV to achieve a current density of 50 mA cm−2 with a Tafel slope value of 122 mV dec−1 for OER process. As a result, the resultant superior electrocatalytic performance of the optimal hydrothermal reaction time‐aided electrocatalyst (NiMoO4/NF‐6 h) is ascribed to highly accessible catalytic active centers and enhanced charge transfer kinetics at the interface for electrochemical reactions. Thus, proposed nanostructure‐constructed electrocatalysts could prove to be prospective OER candidates for electrochemical water oxidation.

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A Low‐Cost Ni–Mo Electrocatalyst for Highly Efficient Hydrogen and Oxygen Evolution Reaction

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/ente.202300118.

Cited by 5 publications

References 55 publications

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Nickel and Molybdenum Composites Decorated Nitrogen‐Doped Carbon Catalysts from Spent Coffee Grounds for Alkaline Hydrogen Evolution

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

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A Low‐Cost Ni–Mo Electrocatalyst for Highly Efficient Hydrogen and Oxygen Evolution Reaction

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/ente.202300118.

Cited by 5 publications

References 55 publications

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

Nickel and Molybdenum Composites Decorated Nitrogen‐Doped Carbon Catalysts from Spent Coffee Grounds for Alkaline Hydrogen Evolution

Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO4) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance

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Controlled Synthesis of 2D Nanostructured Bimetallic Oxide (NiMoO₄) on Self‐Supported Nickel Foam for Boosted Electrocatalytic Seawater Oxidation Performance