Academic literature on the topic 'Bi-functional Electrocatalyst'

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Journal articles on the topic "Bi-functional Electrocatalyst"

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Ekspong, Joakim, and Thomas Wågberg. "Stainless Steel as A Bi-Functional Electrocatalyst—A Top-Down Approach." Materials 12, no. 13 (July 2, 2019): 2128. http://dx.doi.org/10.3390/ma12132128.

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For a hydrogen economy to be viable, clean and economical hydrogen production methods are vital. Electrolysis of water is a promising hydrogen production technique with zero emissions, but suffer from relatively high production costs. In order to make electrolysis of water sustainable, abundant, and efficient materials has to replace expensive and scarce noble metals as electrocatalysts in the reaction cells. Herein, we study activated stainless steel as a bi-functional electrocatalyst for the full water splitting reaction by taking advantage of nickel and iron suppressed within the bulk. The final electrocatalyst consists of a stainless steel mesh with a modified surface of layered NiFe nanosheets. By using a top down approach, the nanosheets stay well anchored to the surface and maintain an excellent electrical connection to the bulk structure. At ambient temperature, the activated stainless steel electrodes produce 10 mA/cm2 at a cell voltage of 1.78 V and display an onset for water splitting at 1.68 V in 1M KOH, which is close to benchmarking nanosized catalysts. Furthermore, we use a scalable activation method using no externally added electrocatalyst, which could be a practical and cheap alternative to traditionally catalyst-coated electrodes.
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Sunarso, Jaka, Alexey M. Glushenkov, Angel A. J. Torriero, Patrick C. Howlett, Ying Chen, Douglas R. MacFarlane, and Maria Forsyth. "Bi-Functional Water/Oxygen Electrocatalyst Based on PdO-RuO2Composites." Journal of The Electrochemical Society 160, no. 1 (November 21, 2012): H74—H79. http://dx.doi.org/10.1149/2.019302jes.

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Tang, Shaobin, Xunhui Zhou, Tianyong Liu, Shiyong Zhang, Tongtong Yang, Yi Luo, Edward Sharman, and Jun Jiang. "Single nickel atom supported on hybridized graphene–boron nitride nanosheet as a highly active bi-functional electrocatalyst for hydrogen and oxygen evolution reactions." Journal of Materials Chemistry A 7, no. 46 (2019): 26261–65. http://dx.doi.org/10.1039/c9ta10500j.

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Wang, Hao-Fan, Cheng Tang, Xiaolin Zhu, and Qiang Zhang. "A ‘point–line–point’ hybrid electrocatalyst for bi-functional catalysis of oxygen evolution and reduction reactions." Journal of Materials Chemistry A 4, no. 9 (2016): 3379–85. http://dx.doi.org/10.1039/c5ta09327a.

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A hybrid electrocatalyst with ‘active point–conductive line–active point’ connections was proposed and exhibited superb bi-functional reactivity for both oxygen reduction and oxygen evolution reactions.
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Meng, Lu, Ling Zhan, Hongliang Jiang, Yihua Zhu, and Chunzhong Li. "Confined Co9S8 into a defective carbon matrix as a bifunctional oxygen electrocatalyst for rechargeable zinc–air batteries." Catalysis Science & Technology 9, no. 20 (2019): 5757–62. http://dx.doi.org/10.1039/c9cy01717h.

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Jin, Liujun, Hui Xu, Cheng Wang, Yong Wang, Hongyuan Shang, and Yukou Du. "Multi-dimensional collaboration promotes the catalytic performance of 1D MoO3 nanorods decorated with 2D NiS nanosheets for efficient water splitting." Nanoscale 12, no. 42 (2020): 21850–56. http://dx.doi.org/10.1039/d0nr05250g.

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Novel NiS/MoO3/NF heterostructured nanorods/nanosheets were rationally constructed via a hydrothermal method followed by an efficient sulfidation treatment to serve as a bi-functional electrocatalyst for overall water splitting.
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Wang, Yaqin, Xinxin Xu, Luyao Liu, Jin Chen, and Guimei Shi. "A coordination polymer-derived Co3O4/Co–N@NMC composite material as a Zn–air battery cathode electrocatalyst and microwave absorber." Dalton Transactions 48, no. 21 (2019): 7150–57. http://dx.doi.org/10.1039/c8dt03792b.

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With a one-dimensional coordination polymer as a precursor, a Co–N active center-rich Co3O4-based bi-functional electrocatalyst was synthesized as a cathode for Zn–air batteries.
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Yuan, Shi-Jie, and Xiao-Hu Dai. "An efficient sewage sludge-derived bi-functional electrocatalyst for oxygen reduction and evolution reaction." Green Chemistry 18, no. 14 (2016): 4004–11. http://dx.doi.org/10.1039/c5gc02729b.

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An efficient, low cost, and stable bi-functional electrocatalyst for ORR and OER consisting of N, Fe, and S multi-doped nanoporous carbon was produced by a facile one-step pyrolysis of sewage sludge under NH3 conditions.
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Maitra, S., R. Mitra, and T. K. Nath. "Aqueous Mg-Ion Supercapacitor and Bi-Functional Electrocatalyst Based on MgTiO3 Nanoparticles." Journal of Nanoscience and Nanotechnology 21, no. 12 (December 1, 2021): 6217–26. http://dx.doi.org/10.1166/jnn.2021.19321.

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Supercapacitor and hydrogen-based fuel cells are cheap and environmental-friendly next-generation energy storage devices that are intended to replace Lithium-ion batteries. Metal oxide nanostructures having perovskite crystal structure have been found to exhibit unique electrochemical properties owing to its unique electronic band structure and multiple redox-active ions. Herein, MgTiO3 nanoparticles (MTO-1) were synthesized by wet-chemical sol–gel technique with an average particle size of 50–55 nm, which exhibited superior supercapacitor performance of capacitance (C) = 25 F/g (at 0.25 A/g), energy density (ED) = 17 Wh/kg, power density (PD) = 275 W/kg and 82.41% capacitance retention (after 1000 cycles). Aqueous 1 M Mg(ClO4)2 solution was used as the electrolyte. MTO-1 revealed an overpotential (η) = 1.329 V and Tafel slope (b) = 374 mV/dec towards Oxygen Evolution Reaction (OER) electrocatalyst and exhibited η = 0.914 V and b = 301.4 mV/dec towards Hydrogen Evolution Reaction (HER) electrocatalyst, both in presence of alkaline 1 M KOH solution, making these MgTiO3 nanoparticles very promising for potential use in various technologically important electrochemical applications.
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Chen, Xiaojuan, Yan Meng, Taotao Gao, Jinmei Zhang, Xiaoqin Li, Hongyan Yuan, and Dan Xiao. "An iron foam acts as a substrate and iron source for the in situ construction of a robust transition metal phytate electrocatalyst for overall water splitting." Sustainable Energy & Fuels 4, no. 1 (2020): 331–36. http://dx.doi.org/10.1039/c9se00348g.

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The cheap iron foam as a 3D substrate for in situ electrochemical preparing bi-functional electrocatalyst. The introduction of phytates facilitates the construction of 3D networks and the join of Co and Fe further creates more catalytic active sites.
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Dissertations / Theses on the topic "Bi-functional Electrocatalyst"

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Nandan, Ravi. "Rational Designing of Bifunctional Electrocatalysts for Electrochemical Energy Conversion and Storage Devices." Thesis, 2017. https://etd.iisc.ac.in/handle/2005/4302.

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Depleting fossil fuels, increasing environmental concerned and looming energy crisis motivates researcher around the globe to explore some of the possible eco-friendly energy alternative resources. Among various available selections, electrochemical energy conversion and storage devices have the potential to serve the portable electronics to automobile sectors. In this regard, direct alkaline methanol fuel cell (DAMFC) is very promising. The efficiency of DAMFC mainly depends upon methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) that take place at anode and cathode of the device, respectively. However, both the reactions are complex and sluggish in nature due to multiple electron transfer involvement and various intermediate species formation during the course of reactions and require catalysts to drive these reactions at desire rates. Pt is known as the best mono metallic catalysts for both MOR and ORR, however, it suffers from catalytic poising and various degradation pathways like dissolution, leaching, agglomeration, Ostwald ripening, etc. Therefore, it is of enormous importance to enhance the operational stability of Pt based electro catalysts by alloying it with other available system or to design Pt-free electrocatalysts without trading off between the activity and stability. Metal-air battery is an energy storage device, relies on ORR and oxygen evolution reaction (OER) which requires efficient and robust electrocatalysts. The literature survey suggests that the combined over-potentials of ORR and OER cause a loss of ~ 70 % in the efficiency of metal-air batteries. Moreover, the commercially available state-of-the-art electro catalysts like Pt-C (for ORR) and RuO2/IrO2 (for OER), in addition to their high cost, are known for their mono-functionality only, and so metal-air battery system requires two kind of electrocatalysts to perform ORR/OER during discharging/charging. Therefore, it is of immense importance to develop commercially viable, robust and bifunctional electrocatalysts to serve the metal-air battery system. The present thesis presents the rational designing of bifunctional, robust and commercially viable electrocatalysts for electrochemical energy conversion and storage devices like DAMFC, metal-air batteries, water electrolyser and their practical realizations.
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