Samsung Sdi Co., Inc.

Chinese Academy of Sciences

Luhua Jiang

Gongquan Sun

Chan-ho Pak

Hyuk Jae Chang

Qin Xin

Seol Ah Lee

Dae-jong Yoo

Suli Wang

Lizhi Yuan

Qiwen Tang

Dae-jung Yoo

Gongguan Sun

Gongquan Sum

A hierarchical porous material contains primary pore aggregates. The primary pore aggregates combine to form the secondary pore aggregates. The secondary pore aggregates connect to each other formed the hierarchical porous material. There are primary pores on the primary pore aggregates wherein the diameter of primary pore is 5-500 nm. There are secondary pores on the secondary pore aggregates wherein the diameter of secondary pore is 1-5 &#x3bc;m. The hierarchical porous material is used as oxygen reduction reaction (ORR) catalysts or photocatalysts having a significantly improved catalytic activity.

Hierarchical porous material and the preparation method thereof

An Ag/MnO/C catalyst is disclosed, wherein MnOis one of MnOand MnO, or the mixture of MnOand MnO, or the mixture of MnOand MnOwith the mass content of MnOin the mixture of MnOand MnObeing 0.01-99.9%. The catalyst is obtained by pyrolyzing AgMnOat a high temperature. The preparation method comprises two steps: (1) preparing AgMnOcrystal as the precursor; (2) preparing the Ag/MnO/C catalyst. The catalyst has advantages such as high oxygen reduction reaction (ORR) catalytic activity in an alkaline environment, good stability, abundant availability and low cost of raw materials, safety, non-toxicity and pollution-free, environmental friendliness, and adaptive capacity for massive production. The catalyst can be used as oxygen reduction catalyst in metal air fuel cell, alkali anion exchange membrane fuel cell and other alkaline environments.

Ag/MnyOx/C catalyst, preparation and application thereof

A method of preparing a supported catalyst includes dissolving a cation exchange polymer in alcohol to prepare a solution containing cation exchange polymer; mixing the cation exchange polymer containing solution with a catalytic metal precursor or a solution containing catalytic metal precursor; heating the mixture after adjusting its pH to a predetermined range; adding a reducing agent to the resultant and stirring the solution to reduce the catalytic metal precursor; mixing the resultant with a catalyst support; adding a precipitating agent to the resultant to form precipitates; and filtering and drying the precipitates. The method of preparing a supported catalyst can provide a highly dispersed supported catalyst containing catalytic metal particles with a reduced average size regardless of the type of catalyst support, which provides better catalytic activity than conventional catalysts at the same loading amount of catalytic metal.

Supported catalyst and method of preparing the same

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Dalian, China

Luhua Jiang