This part of GB/T 20042 specifies the terms and definitions of test method for electrocatalysts for proton exchange membrane fuel cells, platinum content test, electrochemical active surface area test, specific surface area, pore volume, aperture distribution test, morphology and particle size distribution test, crystal structure test, catalyst bulk density test, single cell polarization curve test, etc.
This part is applicable to various types of platinum-based (Pt-based) electrocatalysts for proton exchange membrane fuel cells.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 20042, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part.
GB/T 5816-1995 Catalysts and absorbents - Determination of surface area
GB/T 13566-1992 Determination of bulk density for fertilizers (ISO 3944:1980, EQV)
GB/T 15072.7-2008 Test methods of precious metal alloys - Determination of chromium and iron contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
GB/T 20042.1 Proton exchange membrane fuel cell - Terminology
3 Terms and definitions
For the purposes of this part, the terms and definitions given in GB/T 20042.1 and the following apply.
electrochemical active area
the effective active specific surface area of the catalyst determined by electrochemical method, expressed in m2/g
Note: It indicates the number of active sites for the catalyst to participate in electrochemical reactions.
