Ford Global Technolgoies, LLC

Exxonmobil Chemical Patents Inc.

Ford Motor Company Limited

James Waldecker

Jun Yang

Shinichi Hirano

Stephen Harold Brown

Richard E Soltis

Chunchuan Xu

Andrea Pulskamp

Zijie Lu

Mark S Sulek

Khavinet Lourvanij

Andrew Robert Drews

William Hubert Schank

Kerrie Kathleen Gath

George S Saloka

Mark John Jagner

Patrick Pietrasz

Ron Brost

Michael Alan Tamor

Bruce Carvell Blakemore

Alireza Pezhman Shirvanian

James Anthony Adams

Feng Li

Chendong Huang

Thomas P Brackett, Iii

Benjamin Pence

Tie Wang

Michael Allen DeBolt

Donald Paul Alessi

A fuel cell oxidation reduction reaction catalyst comprising a carbon substrate, an amorphous metal oxide intermediate layer on the substrate, and an intertwined matrix of platinum and elemental niobium arranged to form a surface metal layer covering the intermediate layer such that upon oxidation, the niobium binds with oxygen resulting in strengthened bonds between the platinum and the intermediate layer.

Fuel cell oxidation reduction reaction catalyst

A fuel cell system includes a plurality of fuel cells. Each of the fuel cells may include a current bypass device that is configured to flow a current responsive to an anode potential exceeding a cathode potential to prevent carbon corrosion within the fuel cell.

Current bypass device for proton exchange membrane fuel cell system

According to one aspect of the present invention, there is provided a catalyst assembly. In one embodiment, the catalyst assembly includes a two-dimension (2-D) extensive catalyst including one or more precious catalytic metals and having a catalyst crystal plane; and a substrate supporting the 2-D extensive catalyst, the substrate including one or more non-precious catalytic metals and having a substrate crystal plane in substantial alignment with the catalyst crystal plane.

Catalyst assembly and method of making the same

In one embodiment, the catalyst assembly includes a two-dimension (2-D) extensive catalyst having a catalyst crystal plane; and a substrate supporting the 2-D extensive catalyst and having a substrate crystal plane in substantial alignment with the catalyst crystal plane. In certain instances, the catalyst crystal plane includes first and second adjacent catalyst atoms defining a catalyst atomic distance, the substrate crystal plane includes first and second adjacent substrate atoms defining a substrate atomic distance, a percent difference between the catalyst and substrate atomic distances is less than 10 percent.

A fuel cell assembly includes an anode with a catalyst layer and a gas inlet end, and a cathode with a catalyst layer and a gas inlet end. The assembly comprises a catalyst layer including a first and second set of catalyst segment pairs spaced apart respectively with first and second distances, a first ratio of an average segment width of the first set of catalyst segment pairs relative to the first distance being different from a second ratio of an average segment width of the second set of catalyst segment pairs relative to the second distance.

Electrode with catalyst segmentation

In at least one embodiment, an oxygen reduction reaction catalyst (ORR) and a method for making the catalyst are provided. The method may include depositing a metal oxide on a graphitized carbon or graphene substrate. A platinum catalyst may then be deposited over the metal oxide to provide an ORR catalyst for use in, for example, a PEMFC. The metal oxide may be niobium oxide and may have an amorphous structure. The platinum catalyst may form a thin, electrically interconnected network structure overlaying the metal oxide. The ORR catalyst may be prepared by alternating the deposition of the metal oxide and the platinum catalyst, for example, using physical vapor deposition. The ORR catalyst may have a specific activity of at least 1,000 &#x3bc;A/cmPt and may approach or achieve bulk Pt activity.

Metal oxide stabilized platinum-based ORR catalyst

In at least one embodiment, a fuel cell is provided comprising a positive electrode including a first gas diffusion layer and a first catalyst layer, a negative electrode including a second gas diffusion layer and a second catalyst layer, a proton exchange membrane (PEM) disposed between the positive and negative electrodes, and a microporous layer of carbon and binder disposed between at least one of the first gas diffusion layer and the first catalyst layer and the second gas diffusion layer and the second catalyst layer. The microporous layer may have defined therein a plurality of pores with a diameter of 0.05 to 2.0 &#x3bc;m and a plurality of bores having a diameter of 1 to 100 &#x3bc;m. The bores may be laser perforated and comprise from 0.1 to 5 percent of a total porosity of the microporous layer.

Microporous layer for a fuel cell

A fuel cell system may have at least one sensor including a pair of electrodes disposed on a substrate. The sensor may be configured to produce an output signal having a magnitude that is proportional to a relative humidity in a vicinity of the sensor and, if liquid water is on the sensor, proportional to an amount of the liquid water on the sensor.

Fuel cell system with wetness sensor

A spinning electrode fuel cell is disclosed. The spinning electrode fuel cell includes a housing and a stacked disk assembly which is rotatably mounted in the housing. The stacked disk assembly includes multiple electrochemical cells connected to each other. A motor engages the stacked disk assembly for rotating the stacked disk assembly in the housing. A fuel flow pathway is provided in the housing for distributing a fuel to the electrochemical cells. An oxidant flow pathway is provided in the housing and physically separated from the fuel flow pathway for distributing an oxidant to the electrochemical cells. A method of fabricating a fuel cell is also disclosed.

Spinning electrode fuel cell

In at least one embodiment, a microporous layer configured to be disposed between a catalyst layer and a gas diffusion layer of a fuel cell electrode assembly is provided. The microporous layer may have defined therein a plurality of hydrophilic pores, a plurality of hydrophobic pores with a diameter of 0.02 to 0.5 &#x3bc;m, and a plurality of bores with a diameter of 0.5 to 100 &#x3bc;m. The microporous layer structures and gas diffusion layer assemblies disclosed herein may be defined by a number of various designs and arrangements for use in proton exchange membrane fuel cell systems.

Microporous layer structures and gas diffusion layer assemblies in proton exchange membrane fuel cells

In one embodiment, a method of forming a catalyst/substrate construction includes: identifying a catalyst having a specific activity, determining a surface area factor for supporting the catalyst based on the specific activity of the catalyst; selecting a substrate having the surface area factor; and applying the substrate to the catalyst to form the catalyst/substrate construction. In certain instances, the surface area factor may be determined according to the following equation: wherein the term 'Baseline' refers to mass activity of 100 A per gram of platinum (Pt) for a comparative catalyst 5 nm Pt nano-particles dispersed on a carbon black support, the term 'Mass Activity IF' refers to the activity required to achieve a high current density performance target of 1.5 A/cmat 0.67 V, at a platinum loading of 0.1 mg Pt/cm.

Substrate selection for a catalyst

The present invention relates to a process for reducing the Bromine Index of a hydrocarbon feedstock having at least 50 wt. % of Caromatics, comprising the step of contacting the hydrocarbon feedstock with a catalyst at conversion conditions, wherein the catalyst includes a molecular sieve having a zeolite structure type of MWW.

Process for reducing bromine index of hydrocarbon feedstocks

Process for reducing bromine index of hydrocarbon feedstock

This invention relates to a process for reducing the Bromine Index of a hydrocarbon feedstock having less than 5 wppm oxygenates-oxygen, comprising the step of contacting the feedstock with a catalyst at conversion conditions to form a first effluent, wherein the catalyst includes a molecular sieve having a zeolite structure type of MWW.

Process for reducing Bromine Index of hydrocarbon feedstocks

A spirally-wound fuel cell assembly is disclosed. The spirally-wound fuel cell assembly includes an enclosure. Multiple cell assemblies are disposed in electrical contact with each other and provided in the enclosure. Each of the cell assemblies has at least one membrane electrode assembly including a negative electrode, a positive electrode and a proton conductive membrane sandwiched between the negative electrode and the positive electrode. An oxidant channel is provided in each of the cell assemblies for receiving an oxidant gas. A fuel gas pathway is defined around the cell assemblies for receiving a fuel gas. A method of fabricating a fuel cell assembly is also disclosed.

Growing community of inventors

Farmington Hills, MI, United States of America

James Waldecker