Method of forming a porous nickel coating, and related articles and compositions

Inactive Publication Date: 2007-12-06
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high cost of these materials encourages researchers to find alternative electrocatalysts with efficiency comparable to the efficiency of platinum-based electrocatalysts.
The only drawback of hydrogen-based fuels is that hydrogen

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  • Method of forming a porous nickel coating, and related articles and compositions
  • Method of forming a porous nickel coating, and related articles and compositions
  • Method of forming a porous nickel coating, and related articles and compositions

Examples

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example 1

[0053]Sample Preparation: Porous Ni-Based Coatings by Twin Arc Spray Process

[0054]A wire arc coating of Ni based alloys on Microcell cathodes cut from stainless steel 304 sheet with thickness of about 1.6 millimeters was formed, using a SmartArc-350PP Electric Arc Spray System manufactured by Sulzer Metco. Zinc was co-sprayed with Ni and Ni-based alloys by feeding two wires made of these materials into the spray system. For comparison, a set of samples was prepared by co-spraying nickel along with aluminum. The coating thickness was about 114 microns to about 228 microns after 3 passes.

[0055]Zinc Leaching:

[0056]To determine optimal conditions for leaching, different procedures were tested: hot leaching included leaching at 80° C., and cold leaching included leaching at 25° C. Leaching outside the cell included leaching overnight in a beaker with 30% KOH, while cold in-cell leaching included leaching overnight at 25° C. in an assembled cell, and hot in-cell leaching, included leachin...

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Abstract

A method of forming a porous nickel coating is provided. The method includes the steps of: depositing a coating onto a substrate by melting and atomizing two consumable electrode wires of a selected composition in a wire-arc spray device, so as to form a molten, atomized material, and directing the material to the substrate to form a coating deposit; the selected composition including nickel and a sacrificial metal; and then dissolving at least a portion of the sacrificial metal from the coating deposit by applying a positive potential in an alkaline electrolyte, so as to obtain a porous nickel coating. An electrolytic cell that includes a porous nickel coating is also described.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT[0001]This invention was made with Government support under contract number DE-FC36-04GO14223 awarded by DOE. The Government has certain rights in the invention.BACKGROUND OF THE INVENTION[0002]The invention is related to a method of forming a nickel coating. More particularly, the invention is related to a wire-arc spray coating method of making a porous nickel coating, e.g., a coating which comprises Raney nickel. The invention is also related to an electrode, comprising a porous nickel coating.[0003]Electrocatalysts are extensively used in alternative fuels production (e.g., hydrogen): production of crude oil and gas from non-conventional sources such as tar sands and heavy oil reservoirs: synfuels production (e.g., coal liquefaction / gasification, shale oil). Electrocatalysts are also useful in oil recycling, and other emerging energy technologies such as fuel cells and photovoltaic cells. They are also employed in var...

Claims

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Application Information

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IPC IPC(8): C25F1/00C25B1/02
CPCC25B1/02C25B11/035C25F3/14Y02E60/50H01M4/98H01M8/1011H01M2008/1095H01M4/8885C25B11/031
Inventor ROSENZWEIG, LARRY STEVENSOLOVEICHIK, GRIGORII LEVZAPPI, GUILLERMO DANIEL
Owner GENERAL ELECTRIC CO
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