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GB/T 20042.4-2025: Proton exchange membrane fuel cell - Part 4: Test method for electrocatalysts
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Proton exchange membrane fuel cell - Part 4: Test method for electrocatalysts
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Basic data
Standard ID: GB/T 20042.4-2025 (GB/T20042.4-2025)
Description (Translated English): Proton exchange membrane fuel cell - Part 4: Test method for electrocatalysts
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K82
Classification of International Standard: 27.070
Word Count Estimation: 30,327
Date of Issue: 2025-08-29
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 20042.4-2009
Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China
GB/T 20042.4-2025: Proton exchange membrane fuel cell - Part 4: Test method for electrocatalysts
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20042.4-2025
ICS 27.070
CCSK82
National Standards of the People's Republic of China
Replaces GB/T 20042.4-2009
Proton exchange membrane fuel cells
Part 4.Electrocatalyst Test Methods
Published on 2025-08-29
Implemented on 2026-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4 General Safety Requirements 2
5.Moisture content test 2
6.Metal element content test 3
7.Specific surface area and pore size distribution test 4
8.Morphology and particle size distribution testing 6.
9.Crystal structure and average particle size testing 6.
10.Bulk density test 7
11.Half-cell electrochemical active specific surface area (ECSA) test 8
12 Half-cell oxygen reduction (ORR) polarization curve test 10
13 Half-cell ORR catalyst durability test 12
14 High-potential durability test of half-cell ORR catalyst 13
15.Metal element solubility test 14
16 High-potential durability test of half-cell HOR catalyst 15
17.CO tolerance test of half-cell HOR catalyst 15
Appendix A (Informative) Test Preparation 17
Appendix B (Informative) Reference Test Method 18
References 21
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is Part 4 of GB/T 20042 "Proton Exchange Membrane Fuel Cells". GB/T 20042 has already published the following parts.
---Part 1.Terminology;
---Part 2.General Technical Requirements for Battery Stacks;
---Part 3.Test methods for proton exchange membranes;
---Part 4.Electrocatalyst Test Methods;
---Part 5.Membrane Electrode Testing Methods;
---Part 6.Test methods for bipolar plate characteristics;
---Part 7.Test methods for carbon paper properties.
This document supersedes GB/T 20042.4-2009 "Proton Exchange Membrane Fuel Cells - Part 4.Electrocatalyst Test Methods" and is consistent with...
Compared with GB/T 20042.4-2009, apart from structural adjustments and editorial changes, the main technical changes are as follows.
---The term "electrochemically active area" has been changed to "electrochemically active specific surface area," and the definition has been revised (see 3.2, page 3 of the.2009 edition).
chapter);
---Added terms "moisture content", "half-cell", "working electrode", "counter electrode", "reference electrode", "three-electrode system", and "mass-specific activity".
"Area-to-specific activity" and "durability" and their definitions (see 3.2–3.10);
---Moisture content testing has been added (see Chapter 5);
---Changes were made to the testing of metal element content, specific surface area and pore size distribution, morphology and particle size distribution, crystal structure and average...
Particle size and bulk density testing (see Chapters 6-10, Chapters 4-9 of the.2009 edition);
---Changes were made to the half-cell electrochemical activity specific surface area test and the single-cell oxygen reduction (ORR) catalyst mass specific activity test (see section [number]).
Chapter 11 and Appendix B.3 (Chapter 10 of the.2009 edition);
---Added testing methods for ORR polarization curves under half-cell conditions, ORR catalyst durability testing, high-potential durability testing, and metal...
Elemental solubility test, high-potential durability test of hydrogen hydroxide (HOR) catalyst, and CO tolerance test (see Chapters 12-17)
chapter).
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee on Standardization of Fuel Cells and Flow Batteries (SAC/TC342).
This document was drafted by. Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian University of Technology; and Beijing Institute of Electrical Engineering and Economics, China Machine Press.
Research Institute, CAS Clean Energy Innovation Research Institute Suzhou Co., Ltd., Wuhan University of Technology, Beijing University of Chemical Technology, Shanghai Jiping New Energy Technology Co., Ltd.
The company, Wuxi Weifu High-Tech Group Co., Ltd., China Automotive Technology and Research Center for New Energy Vehicles (Tianjin) Co., Ltd., and Zijin Mining Group.
Joint-stock company, Suzhou Hydrogen Energy Industry Innovation Center Co., Ltd., Xinyan Hydrogen Energy Technology Co., Ltd., Jiangsu Toute New Energy Co., Ltd.
Company, Shenzhen General Hydrogen Energy Technology Co., Ltd., Beijing University of Science and Technology, Tongji University, Guochuang Hydrogen Energy Technology Co., Ltd., Beijing Qingpu Chuangneng Technology Co., Ltd.
Technology Co., Ltd., Anhui Tomorrow Hydrogen Energy Technology Co., Ltd., State Power Investment Corporation Hydrogen Energy Technology Development Co., Ltd., China Quality Certification Center
Xin Co., Ltd., Qingqing (Beijing) Technology Co., Ltd., Xiamen University of Technology, Shandong Guochuang Fuel Cell Technology Innovation Center Co., Ltd., Hongji
Chuangneng Technology (Guangzhou) Co., Ltd., Weichai Power Co., Ltd., Foshan Xianhu Laboratory, China Automotive Engineering Research Institute Co., Ltd.
The company, Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co., Ltd., and Suzhou Kerun New Materials Co., Ltd.
The main drafters of this document are. Zhang Hongjie, Song Yujiang, Hou Ming, Pan Mu, Zhang Liang, Shao Zhigang, Dou Meiling, Lü Yang, Zhang Yihuang, Ding Qi, and Yao Yingfang.
Qi Zhigang, Chen Dongfang, Yao Keguang, Ma Tiancai, Gao Rui, Hao Dong, Wang Chaoyun, Gao Pengran, Wang Gang, Han Fujiang, Zhu Jun'e, Zhang Yanfeng, Li Chunji
Lei Yijie, Hua Qiuru, Tang Haolin, Wang Ruidi, Chen Wenmiao, Jiang Shangfeng, Pan Fengwen, Chen Ran, Zhao Mingquan, Mao Zhanxin, Liu Guoqing, Meng Wei, Pei Fenglai
Fu Na, Yang Yanbo, Yang Dawei, Diao Lipeng.
The release history of this document and the document it replaces is as follows.
---First published in.2009 as GB/T 20042.4-2009;
---This is the first revision.
introduction
In light of the development of proton exchange membrane fuel cell technology, this initiative aims to serve upstream and downstream manufacturers of proton exchange membrane fuel cell power generation systems and their users.
GB/T 20042 provides unified terminology and definitions, and provides unified standards for proton exchange membrane fuel cell stacks and their key components.
The experimental method.
GB/T 20042 "Proton Exchange Membrane Fuel Cells" is proposed to consist of nine parts.
---Part 1.Terminology. The purpose is to define the terminology and definitions used in proton exchange membrane fuel cell technology and its applications.
---Part 2.General Technical Requirements for Proton Exchange Membrane Fuel Cell Stacks. The purpose is to provide general technical requirements and testing procedures for proton exchange membrane fuel cell stacks.
Methods and testing rules, etc.
---Part 3.Proton Exchange Membrane Testing Methods. The aim is to provide methods for determining the thickness uniformity of proton exchange membranes in proton exchange membrane fuel cells.
Test methods for sex and proton conductivity, etc.
---Part 4.Electrocatalyst Testing Methods. The aim is to provide information on the platinum content and electrochemical properties of proton exchange membrane fuel cell electrocatalysts.
Test methods for active specific surface area, etc.
---Part 5.Membrane Electrode Testing Methods. The aim is to provide information on the thickness uniformity and Pt loading of membrane electrode assemblies (MEAs) in proton exchange membrane fuel cells.
Quantity and other testing methods.
---Part 6.Bipolar Plate Characteristic Testing Methods. The aim is to provide methods for determining the flexural strength, density, and other properties of bipolar plates in proton exchange membrane fuel cells.
Test methods for resistance, etc.
---Part 7.Test Methods for Carbon Paper Characteristics. The aim is to provide methods for testing the thickness uniformity, resistivity, and mechanical properties of carbon paper in proton exchange membrane fuel cells.
Mechanical strength and other testing methods.
---Part 8.Control System Technical Requirements. The purpose is to provide the technical requirements and test procedures for the proton exchange membrane fuel cell control system.
Verification method.
---Part 9.Vibration Testing Methods. The purpose is to provide vibration requirements and testing methods for proton exchange membrane fuel cells.
......
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