Introducing Ni in Ru oxide is a promising approach to enhance the catalytic activity for the oxygen evolution reaction (OER). However, the role of Ni (which has a poor intrinsic activity) is not fully understood. Here, a RuNiOx electrode fabricated via a modified dip coating method exhibited excellent OER performance in acidic media, and neutral me...
A silver-deposited nickel (Ag/Ni) wire electrode was prepared via a galvanic replacement reaction between Ag⁺ and Ni wire in aqueous solution. It was then found that the Ag/Ni wire electrode could be modified with Pt simply by treating it in an aqueous solution of K₂PtCl₄. Although the deposition of Ag on Ni wire was limited in amount, forming Ag d...
Published in Applied Physics A
The objective of the present study was to investigate the effects of femtosecond laser-induced modifications on the current–voltage (I–V) characteristics between Ni electrodes deposited on laser-irradiated areas on n-type 4H–SiC crystals. We investigated the I–V characteristics and their changes from low-temperature annealing at 400 °C or 500 °C. T...
Published in Chemical Research in Chinese Universities
The electrochemical behaviour of magnesium(II) and the formation mechanism of Mg-Ni alloys on Ni electrode were studied in LiCl-KCl eutectic using various electrochemical techniques. Cyclic voltammogram and square-wave voltammogram revealed that under-potential deposition of magnesium occurred on Ni electrode because Mg-Ni alloy compounds were form...
Published in Electrocatalysis
In order to efficiently operate the alkaline water electrolyzers with renewable energy, behaviors of the electrolyzer during start-up or shut-down must be unveiled, because they might be suffered by reverse current that naturally flows. The mechanism of the reverse current in alkaline water electrolyzer having relation between the electrolyzer oper...
京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第19729号 / 工博第4184号 / 新制||工||1645(附属図書館) / 32765 / 京都大学大学院工学研究科物質エネルギー化学専攻 / (主査)教授 江口 浩一, 教授 安部 武志, 教授 陰山 洋 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM
Published in ACS nano
We introduce a method for direct patterning of Ni electrodes through selective laser direct writing (LDW) of NiO nanoparticle (NP) ink. High-resolution Ni patterns are generated from NiO NP thin films by a vacuum-free, lithography-free, and solution-processable route. In particular, a continuous wave laser is used for the LDW reductive sintering of...
Published in International Journal of Hydrogen Energy
•The electrochemical performance of reversible MCFC is investigated.•It shows that the MCFC can be reversed and used also for fuel production.•The Ni hydrogen electrode shows slightly higher polarization in electrolysis cell mode.•The NiO oxygen electrode performs much lower polarization in electrolysis cell mode.
Published in Journal of Materials Synthesis and Processing
The heat treatment of base-metal Ni electrode multilayer capacitors (MLCs) in air was investigated with a view to reducing manufacturing costs. This treatment was found to recover the insulation resistance in the same way as heat treatment under low oxygen partial pressure. At temperatures above 800°C, heat treatment in air was associated with crac...
Published in Analytica Chimica Acta
A well-defined luminescence, induced by the electrocatalytic oxidation of simple hydroxy compounds at a Ni electrode in alkaline media containing a fluorescent compound, has been studied with a view to make use of it for the sensitive detection of those compounds. For luminescent reactions with various substrates, including ethanol, polyols and glu...
