The present disclosure relates to a method for preparing a metal single-atom catalyst for a fuel cell. The method for preparing a metal single-atom catalyst uses a relatively lower amount of chemical substances as compared to the conventional methods and thus is eco-friendly, uses no liquid through the whole process and avoids a need for additional steps for separating and/or washing the catalyst after its synthesis, thereby allowing simplification of the process, and can produce a single-atom catalyst at low cost. In addition, unlike the conventional methods having a limitation in metallic materials, the method can be applied in common regardless of types of metals, and thus is significantly advantageous in that it can be applied widely to obtain various types of metal single-atom catalysts. Further, in the method for preparing a metal single-atom catalyst, metal atoms totally participate in the reaction. Thus, the method can minimize the usage of metal to provide high cost-efficiency.

A core-shell structure nanosheet includes a metal ruthenium nanosheet, and a platinum atomic layer provided on a surface of the metal ruthenium nanosheet. An electrocatalyst includes carbon, and the core shell structure nanosheet supported on the carbon. A method for manufacturing an electrocatalyst includes applying a ruthenium oxide nanosheet colloid which comprises a ruthenium oxide nanosheet, on carbon to obtain a carbon-supported ruthenium oxide nanosheet, in which the ruthenium oxide nanosheet is supported on the carbon. The carbon-supported ruthenium oxide nanosheet is reduced to obtain a carbon-supported ruthenium metal nanosheet, in which a ruthenium metal nanosheet is supported on the carbon. A platinum atomic layer is provided on a surface of the metal ruthenium nanosheet to obtain the electrocatalyst.

Catalysts comprising nanostructured elements comprising microstructured whiskers having an outer surface at least partially covered by a catalyst material having the formula Pt.sub.xNi.sub.yAu.sub.z, wherein x is in a range from 27.3 to 29.9, y is in a range from 63.0 to 70.0, and z is in a range from 0.1 to 9.6. Catalyst described herein are useful, for example, in fuel cell membrane electrode assemblies.

A proton exchange membrane fuel cell (PEMFC). The PEMFC includes a catalyst support material formed of a metal material reactive with H.sub.3O.sup.+, HF and/or SO.sup.− to form reaction products in which the metal material accounts for a stable molar percentage of the reaction products. The PEMFC further includes a catalyst supported on the catalyst support material.

A fuel cell catalyst and a method for manufacturing the same are disclosed. The fuel cell catalyst includes: a support including titanium suboxide and carbon; and an active material supported on the support and including iridium (Ir), ruthenium (Ru), and yttrium (Y). The active material is represented by the following Formula 1: [Formula 1] IrRu.sub.aY.sub.b, wherein a is between 1 and 5 (1≤a≤5), and b is between 0.1 and 2 (0.1≤b≤2).

A fuel cell bipolar plate (BPP) includes a metal substrate having a bulk portion and a surface portion comprising an anticorrosive, conductive material having oxygen vacancies and a formula (I):

MgTi.sub.2O.sub.5-(I),

where .sub. is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies, the material having an electronic conductivity of about 2-10 S/m at room temperature in an ambient environment.

A fuel cell catalyst system includes a catalyst and a catalyst support material binding the catalyst and including an anticorrosive, conductive material having oxygen vacancies and a formula (I):

MgTi.sub.2O.sub.5-(I),

where
.sub. is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies, the material having an electronic conductivity of about 2-10 S/m at room temperature in an ambient environment.

The present disclosure relates to an electrolyte membrane for fuel cells including a hydrogen peroxide generating catalyst and a hydrogen peroxide decomposing catalyst, the electrolyte membrane exhibiting highly improved durability, and a method of manufacturing the same. Specifically, the electrolyte membrane includes a support and a catalyst particle including a catalyst metal supported by the support, the catalyst metal including one selected from the group consisting of a first metal having catalyst activity to generate hydrogen peroxide, a second metal having catalyst activity to decompose hydrogen peroxide, and a combination thereof.

An anticorrosive, conductive material includes a first oxide having oxygen vacancies and a formula (I): MgTi.sub.2O.sub.5- (I), where .sub. is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies; and a second oxide having a formula (II): Ti.sub.aO.sub.b (II), where 1<=a<=20 and 1<=b<=30, optionally including a fractional part, the first and second oxides of formulas (I) and (II) forming a polycrystalline matrix.

A method of forming a fuel cell catalyst system, the method includes providing an anticorrosive, conductive catalyst support material having oxygen vacancies and a formula (I):

MgTi.sub.2O.sub.5-(I),

where .sub. is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies, coating the catalyst support material with a polymeric film, attaching a catalyst material onto the polymeric film, removing the polymeric film, and providing additional material onto the support material to increase physical, electrical, and/or mechanical contact between the catalyst material and the catalyst support material.