Earl Jennings Taylor

US Patent:

50841440, Jan 28, 1992

Filed:

Jul 31, 1990

Appl. No.:

7/560206

Inventors:

N. R. K. Vilambi Reddy - Salem NH
Everett B. Anderson - Reading MA
Earl J. Taylor - Chelmsford MA

Assignee:

Physical Sciences Inc. - Andover MA

International Classification:

C25D 500
C25B 1104

US Classification:

205104

Abstract:

Gas-diffusion electrodes (GDE's) suitable for use with a solid polymer electrolyte (s. p. e. ), particularly in s. p. e. fuel cells, which GDE's provide unusually highly efficient use of noble or precious electrocatalytic metals, are obtained by starting with a GDE which is essentially fully fabricated except for electrocatalytic metal treatment and s. p. e. treatment, e. g. a carbon GDE having a gas-permeable hydrophobic face and a particulate carbon-containing catalytic face. This untreated GDE is treated by a. impregnating an s. p. e. solutuion into the catalytic face until the solution penetrates part way into the cross-section of the GDE, especially into the carbon particulate or other support material, but not as far as the hydrophobic, gas permeable face, b. inserting the thus-treated GDE and a counterelectrode into a plating bath containing, for example, M. sup. +, M. sup. ++, and/or M. sup.

US Patent:

51321939, Jul 21, 1992

Filed:

Mar 7, 1991

Appl. No.:

7/665789

Inventors:

N. R. K. Vilambi Reddy - Andover MA
Earl J. Taylor - Chelmsford MA

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

H01M 490
H01M 810

US Classification:

429 13

Abstract:

In this method, a lower alcohol is oxidized directly (i. e. without reformation) to CO. sub. 2 +H. sub. 2 O at the anode of a fuel cell, and a reducible gas (e. g. air or O. sub. 2) is reduced at the cathode. High, reasonably constant current densities at low over-voltages can be obtained. The electrolyte is preferably an acidic solid polymer electrolyte, and the anode comprises, as the electrocatalyst, a combination of a Group VIII noble metal with gold having significant Au (111) character. The (111) face of gold crystals (preferably crystals in the size range of about 4 to 15 nm) have been found to be specific for oxidation of intermediate alcohol oxidation products (CO, CHO, COH, HCHO, CH. sub. 3 CHO, etc. ) to CO. sub. 2 or CO. sub. 2 +H. sub. 2 O. Thus, the combination of a Group VIII metal such as Pt with Au (111) avoids "poisoning" of the Pt by these intermediate products.

US Patent:

50857436, Feb 4, 1992

Filed:

May 2, 1990

Appl. No.:

7/518071

Inventors:

N. R. K. Vilambi Reddy - Salem NH
Everett B. Anderson - Reading MA
Earl J. Taylor - Chelmsford MA

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

C25D 518

US Classification:

205105

Abstract:

The gas-sensing electrodes prepared according to this invention are specifically designed for cells which operate in a current-limited mode, i. e. at current densities well below 20 mA/cm. sup. 2. Such cells are particularly useful to measure or detect a gaseous component of a gaseous environment or stream, provided the gaseous component can be electrochemically oxidized or reduced. In an alkaline, metal-oxygen cell for example, an electrode of this invention can be used as an oxygen cathode. The electrode is prepared by: (a) bringing an exposed face of a self-supporting, electrically-conducting sheet of fibrous or sintered-particle material having a thickness of at least about 30. mu. m and a flexural strength of at least 2000 kPa into contact with an electrolyte containing ions of a catalytic metal, the electrolyte also being in contact with a counterelectrode, (b) applying a pulsed-D. C. current which tends to favor electroplating of metal and strong adherence of the plated metal to the electrically-conducting sheet, so that a continuous electrodeposited layer of catalytic metal is formed, and (c) applying a hydrophobic layer to the thus-plated face, this hydrophobic layer being thick enough to limit gas diffusion into the cross-section of the sheet, so that the resulting electrode will operate in a current-limited mode, but not so thick as to have a significant adverse effect upon the response time of the cell.

US Patent:

50411950, Aug 20, 1991

Filed:

Nov 13, 1989

Appl. No.:

7/434898

Inventors:

Earl J. Taylor - Chelmsford MA
Gary A. Moniz - Windham NH

Assignee:

Physical Sciences Inc. - Andover MA

International Classification:

C25B 100
C25B 1108

US Classification:

204 96

Abstract:

The disclosed electrocatalyst material is useful in electrodes, especially in cathodes for the reduction of oxygen or peroxide to water or hydroxide. The electrocatalyst typically comprises 0. 1 to 20 weight-%, based on the weight of the material, of a supported particulate elemental gold wherein the particles are apparently crystalline in nature, apparently with exposed (100) faces, but smaller in size than 5 nanometers (0. 7 volt vs. RHE at 200 mA/cm. sup.

US Patent:

51338424, Jul 28, 1992

Filed:

Mar 15, 1991

Appl. No.:

7/670200

Inventors:

Earl J. Taylor - Chelmsford MA
Gary A. Moniz - Windham NH

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

C25B 116
C25B 1108

US Classification:

204 98

Abstract:

The disclosed electrocatalyst material is useful in electrodes, especially in cathodes for the reduction of oxygen or peroxide to water or hydroxide. The electrocatalyst typically comprises 0. 1 to 20 weight-%, based on the weight of the material, of a supported particulate elemental gold wherein the particles are apparently crystalline in nature, apparently with exposed (100) faces, but smaller in size than 5 nanometers (0. 7 volts vs.

US Patent:

20200378028, Dec 3, 2020

Filed:

May 7, 2020

Appl. No.:

16/869014

Inventors:

- Englewood OH, US
Jing Xu - Englewood OH, US
Timothy D. Hall - Englewood OH, US
Earl Jennings Taylor - Troy OH, US
Alan Bonifas - Vandalia OH, US
Rajeswaran Radhakrishnan - Miamisburg OH, US

International Classification:

C25D 5/44
C25D 5/18

Abstract:

A method of plating a workpiece, the method includes electrochemically removing any oxide on the surface of the workpiece by applying a first waveform to the workpiece and a cathode both placed in a first electrolyte solution, and electroplating the workpiece surface by applying a second waveform to the workpiece and an anode both placed in a second electrolyte solution including a plating material.

US Patent:

20200318253, Oct 8, 2020

Filed:

Jan 28, 2020

Appl. No.:

16/774232

Inventors:

- Englewood OH, US
Holly M. Garich - Fairborn OH, US
Heather McCrabb - Kettering OH, US
Earl Jennings Taylor - Troy OH, US

International Classification:

C25F 3/16
B33Y 40/20
C25F 7/00

Abstract:

A method of and system for surface finishing an additive manufactured part. A part having a surface roughness with macroasperities is placed in a chamber with an electrolyte and an electrode. A pulse/pulse reverse power supply is connected to the part rendering it anodic and connected to the electrode rendering it cathodic. The power supply is operated to decrease the surface roughness of the part by applying a first series of waveforms including at least two waveforms where a diffusion layer is maintained at a thickness to produce a macroprofile regime relative to the macroasperities, the first series of waveforms having anodic voltages applied for anodic time periods before cathodic voltages applied for cathodic time periods to effect part surface smoothing to a first surface roughness with minimal material removal and applying a final waveform where the diffusion layer represents a microprofile regime, the final waveform having a final anodic voltage applied for a final anodic time period before a final cathodic voltage applied for a final cathodic time period to effect part surface smoothing to a final surface roughness with minimal material removal.