Abstract:
The invention concerns an aqueous electrolytic solution with acid pH for electrochemical deposit of palladium or its alloys comprising a palladium compound, and optionally at least a secondary metal compound to be co-deposited in the form of an alloy with the palladium, and comprising further ethylenediamine as complexing agent for the palladium and an organic brightening agent wherein said brightening agent is 3-(3-pyridyl)acrylic acid, 3-(3-quinolyl)acrylic acid or one of their salts. The invention also concerns a method for electroplating palladium or a palladium alloy comprising electrolysis of an electrolytic solution as defined above, using current densities ranging between 0.5 and 150 A/dm .
Abstract:
Exemplary methods of electroplating may include providing a patterned substrate having at least one opening, where the opening includes one or more sidewalls and a bottom surface. The methods may also include plating a first portion of ruthenium-containing material on the bottom surface of the opening at a first deposition rate and a second portion of ruthenium-containing material on the sidewalls of the opening at a second deposition rate, where the first deposition rate is greater than the second deposition rate. The methods may be used to make integrated circuit devices that include void-free, electrically-conductive lines and columns of ruthenium-containing materials.
Abstract:
Die vorliegende Erfindung richtet sich auf eine Platinelektrolyten, welcher bestimmte Zuschlagsstoffe enthält, sowie ein Verfahren zur elektrolytischen Abscheidung einer Platinschicht mit Hilfe des erfindungsgemäßen Elektrolyten.
Abstract:
The present invention relates to an electrocatalyst comprising a Ti substrate coated with a 3D Cu nanostructured matrix decorated with a mixture of amorphous TiO 2 and nanoparticles of a noble metal, preferably Pt nanoparticles, an electrochemical cell comprising said electrocatalyst and their use for hydrogen production via hydrogen evolution reaction (HER) in basic conditions. The present invention also refers to an in situ process for the preparation of said electrocatalyst and simultaneous production of hydrogen, comprising the steps of: (a) providing an electrochemical cell having a 3-electrode configuration comprising a starting working electrode which comprises a Ti substrate coated with vertically oriented CuO nanoplatelets, the cell further comprising a counter electrode and a reference electrode; (b) adding an aqueous basic electrolyte solution to the cell of step (a), said aqueous basic electrolyte solution comprising a precursor of a noble metal, preferably a Pt precursor; (c) applying a negative potential with respect to the reference electrode to the cell of step b). The present invention also refers to a process for producing hydrogen which utilizes the electrochemical cell comprising the electrocatalyst according to the invention.
Abstract:
본 발명의 홀로그램 무늬의 제조방법 및 표면에 홀로그램 무늬를 갖는 금속 도금층을 포함하는 시편은, 도금 후 식각이라는 비교적 간단한 방법으로 홀로그램 무늬를 금속 도금층 상에 형성할 수 있다. 또한, 본 발명의 홀로그램 무늬의 제조방법은, 금속 시편이 아닌 금속도금층에 적용이 가능하여 도금이 가능한 소재라면 적용이 가능한 폭넓은 적용성을 가지며, 도금 후 무늬생성이라는 빛과 보는 사람의 위치에 따라서 서로 다른 색으로 보이는 홀로그램 무늬를 비교적 단순한 공정으로 형성할 수 있다.
Abstract:
L'invention concerne un procédé de fabrication d'une sous-couche métallique à base de platine sur un substrat métallique. De façon caractéristique, le procédé comporte les étapes suivantes : a) on fournit une pièce métallique formant substrat (100), b) on fournit un bain électrolytique formé d'un milieu liquide ionique avec un ou plusieurs sels d'aluminium, c) on réalise le dépôt d'une première couche d'un premier métal (120) sur le substrat (100) de façon à obtenir un substrat revêtu de la première couche métallique (100+120), d) on réalise le dépôt d'une deuxième couche d'un deuxième métal sur la première couche, de façon à obtenir un substrat revêtu de la première couche métallique et de la deuxième couche métallique, dans lequel l'un parmi le premier métal et le deuxième métal est un métal de la mine du platine (platinoïde) et l'autre parmi le premier métal et le deuxième métal est de l'aluminium déposé par électrodéposition avec ledit bain électrolytique formé d'un milieu liquide ionique, et la couche d'aluminium (130) présente une épaisseur comprise entre 10 et 50 μm. Application à une pièce de turbomachine.
Abstract:
The present invention provides an aqueous platinum electroplating bath comprising: a) a source of platinum ions; and b) a source of borate ions. The aqueous platinum electroplating bath may optionally comprise one or more levellers. The invention also provides the use of the platinum electroplating bath.
Abstract:
본 발명은 평평한 형상의 전극판; 상기 전극판은, 다수개로 배치되되, 상기 전극판과 전극판 사이에 배치되는 절연성 와셔에 의해 서로 이격되고, 상기 전극판에 형성되는 결합공에 삽입되는 절연성 체결부재에 의해 체결되고, 상기 전극판에는 다수개의 통공이 형성되며, 상기 전극판의 양극은 티타늄(Ti) 기재에 백금(Pt)이 도금된 것인 전극구조에 관한 것으로, 물의 전기분해시, 통공에 의해 전극판에서 발생되는 수소기포 및 산소기포를 상기 전극판으로부터 쉽게 이탈시킬 수 있고, 전극판의 표면에 종래의 돌출부와 같은 부분이 없으므로, 전극판과 다른 전극판을 이격 배치하여 전극판조립체를 구성할 때 그 부피를 최소화시킬 수 있고, 장시간 사용시에도 전해액의 농도 유지가 가능하고, 불순물로 인한 전극 사이의 숏트현상을 감소시킬 수 있다.
Abstract:
Microelectrode assemblies and related methods are disclosed for bio-stimulating and/or bio-sensing a target tissue. The assemblies can include a two-side substrate, an array of microelectrodes, each of the microelectrodes including a nano-wire embedded within the substrate and extending from a proximal end to a distal end and through the substrate, each nano-wire having a diameter preferably less than 1 µm. The substrate can include portions made of nano-porous material(s) through which the microelectrodes pass. The substrate with the embedded nano-wires can effectively be fluid impermeable. The proximal ends of the nano-wires can be adapted to be connected to an electronic device and the distal ends are adapted to be disposed in a biological environment for bio- stimulating a target tissue and/or bio-sensing activities of the target tissue. Suitable alloys such as platinum, platinum-iridium, and/or other noble-metal-alloyed compositions can be used for the nano-wires.