Journal ArticleDOI
Electrodes for Alkaline Water Electrolysis
TLDR
In this paper, a polysilicate-based coating is applied to polysilicon-based paints containing particles of the desired metals and the coating is sintered into a porous structure which is bonded firmly to the substrate.Abstract:
Electrodes for alkaline water electrolysis have been made by applying high specific surface area coatings of nickel or nickel‐iron alloy to steel or nickel substrates. The coatings are applied as polysilicate‐based paints containing particles of the desired metals. The coating is sintered into a porous structure which is bonded firmly to the substrate. The present electrode preparation method has been used to coat a variety of substrate forms, such as flat plates or wire screens, and is compatible with commercial alkaline electrolysis equipment. The resulting electrodes were found to be particularly effective as anodes for oxygen evolution. The efficiency of the electrodes was greatly influenced by coating microstructure. This microstructure, in turn, could be controlled by adjusting the sintering conditions. Electrochemical operating characteristics of the electrodes in at 80°C were determined. Comparable oxygen evolution efficiencies were obtained with coatings made from nickel powders, nickel flake, and nickel‐iron alloy powder.read more
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Journal ArticleDOI
In situ cobalt-cobalt oxide/N-doped carbon hybrids as superior bifunctional electrocatalysts for hydrogen and oxygen evolution.
TL;DR: Inspired by the superiority of carbon conductivity, the propitious H atom binding energy of metallic cobalt, and better OER activity of cobalt oxide, cobalt-cobalt oxide/N-doped carbon hybrids (CoOx@CN) composed of Co(0), CoO, Co3O4 applied to HER and OER are synthesized.
Journal ArticleDOI
Nanoscale nickel oxide/nickel heterostructures for active hydrogen evolution electrocatalysis
Ming Gong,Wu Zhou,Mon-Che Tsai,Jigang Zhou,Mingyun Guan,Meng-Chang Lin,Bo Zhang,Yongfeng Hu,Di Yan Wang,Jiang Yang,Stephen J. Pennycook,Bing-Joe Hwang,Hongjie Dai +12 more
TL;DR: N nanoscale nickel oxide/nickel heterostructures formed on carbon nanotube sidewalls as highly effective electrocatalysts for hydrogen evolution reaction with activity similar to platinum are reported.
Journal ArticleDOI
A mini review of NiFe-based materials as highly active oxygen evolution reaction electrocatalysts
Ming Gong,Hongjie Dai +1 more
TL;DR: In this article, the early discovery and recent progress on NiFe-based OER electrocatalysts in terms of chemical properties, synthetic methodologies and catalytic performances are presented.
Journal ArticleDOI
Precision and correctness in the evaluation of electrocatalytic water splitting: revisiting activity parameters with a critical assessment
Sengeni Anantharaj,Sengeni Anantharaj,Sivasankara Rao Ede,Sivasankara Rao Ede,Kannimuthu Karthick,Kannimuthu Karthick,Selvasundarasekar Sam Sankar,Selvasundarasekar Sam Sankar,Kumaravel Sangeetha,Kumaravel Sangeetha,Pitchiah Esakki Karthik,Subrata Kundu,Subrata Kundu +12 more
TL;DR: In this paper, the authors have discussed the use and validity of ten important parameters, namely overpotential at a defined current density, iR-corrected over-potential, Tafel slope, exchange current density (j0), mass activity, specific activity, faradaic efficiency (FE), turnover frequency (TOF), electrochemically active surface area (ECSA), and measurement of double layer capacitance (Cdl) for different electrocatalytic materials that are frequently employed in both oxygen evolution reaction (OER) and HER.
Journal ArticleDOI
Atomically isolated nickel species anchored on graphitized carbon for efficient hydrogen evolution electrocatalysis.
Lili Fan,Peng Fei Liu,Xuecheng Yan,Lin Gu,Zhenzhong Yang,Hua Gui Yang,Shilun Qiu,Xiangdong Yao +7 more
TL;DR: This work synthesizes a nickel–carbon-based catalyst, from carbonization of metal-organic frameworks, to replace currently best-known platinum-based materials for electrocatalytic hydrogen evolution, exhibiting highly efficient hydrogen evolution performance with high exchange current density and impressive durability.
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