Green and sustainable bifunctional carbonized wood electrodes decorated with controlled nickel/α(β)-nickel(ii) hydroxide to boost overall water splitting

Literature Information

Publication Date 2023-11-24
DOI 10.1039/D3TA05519A
Impact Factor 12.732
Authors

Jun Yong Yang, Jae Gyu Ahn, Boemjin Ko, Taeyoung Park, Soon-Jik Hong, Dongju Lee, Cheng Ai Li, Sung Ho Song


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Abstract

For practical implementation of water splitting, development of efficient bifunctional catalytic electrodes by replacing precious metal-based electrocatalysts with transition metal-based electrocatalysts with high efficiencies and stabilities for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is highly desirable. Accordingly, herein, flower-like Ni/α-Ni(OH)2 particles and nanosheet-shaped Ni/α&β-Ni(OH)2 arrays with adjustable shapes are first fabricated on a carbonized wood (CW) electrode without binders and additives via a simple electrodeposition approach. The hierarchically porous CW electrode with high active surface area provides effective triple pathways for the transport of electrons and ions and release of gas bubbles. Thus, the as-prepared Ni/Ni(OH)2/CW electrodes demonstrate low overpotentials of HER (62 mV; Ni/α&β-Ni(OH)2/CW), which is comparable to that of Pt/C catalyst, and OER (367 mV; Ni/α-Ni(OH)2/CW) in alkaline electrolytes, and the bifunctional electrocatalyst exhibits efficient performance with a cell voltage of 1.74 V at 10 mA cm−2. Furthermore, the cost-effective, eco-friendly, and easily manufactured Ni/Ni(OH)2/CW electrodes can be successfully applied to commercial batteries and solar panels, revealing the feasibilities and practicalities of bifunctional Ni/Ni(OH)2/CW electrodes as active and scalable electrodes for green energy systems of water splitting.

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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