Local structure engineering for active sites in fuel cell electrocatalysts
- PDF / 9,243,924 Bytes
- 14 Pages / 595.276 x 793.701 pts Page_size
- 109 Downloads / 198 Views
tps://doi.org/10.1007/s11426-020-9828-5
SPECIAL TOPIC: Electrocatalysis & Energy Science
Local structure engineering for active sites in fuel cell electrocatalysts 1
1
1
Han Cheng , Renjie Gui , Si Liu , Yi Xie 1
1,2
& Changzheng Wu
1,2*
Hefei National Laboratory for Physical Science at the Microscale, CAS Centre for Excellence in Nanoscience, Collaborative Innovation
Centre of Chemistry for Energy Materials (iChEM), CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, China; Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230026, China
2
Received April 14, 2020; accepted July 15, 2020; published online October 15, 2020
In this review, we surveyed the significance of local structure engineering on electrocatalysts and electrodes for the performance of oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). Both on precious metal catalysts (PMC) and non-precious metal catalysts (NPMC), the main methods to modulate local structure of active sites have been summarized. By change of atomic coordination, modulation of bonding distortion and synergy effect from hierarchical structure, local structure engineering has influence on the intrinsic activity and stability of electrocatalysts. Moreover, we emphasized the intimate correlation between lyophobicity of electrocatalysts and membrane electrodes by local structure engineering. Our review aimed to inspire the exploration of advanced electrocatalysts and mechanism study for PEMFCs based on local structure engineering. local structure engineering, proton exchange membrane fuel cells, oxygen reduction reaction, active sites Citation:
Cheng H, Gui R, Liu S, Xie Y, Wu C. Local structure engineering for active sites in fuel cell electrocatalysts. Sci China Chem, 2020, 63, https://doi. org/10.1007/s11426-020-9828-5
1 Introduction Increasing depletion of fossil fuels and environmental crisis stimulate the urgent research for renewable energy sources, such as wind, solar and water energy [1–3]. These energy utilization patterns suffer from seriously uneven distribution between geographical power generation and load centers as well as seasonal unbalance [4,5]. Hydrogen, as a clean and efficient energy carrier, plays a vital role in the correlation among electricity generation, energy storage and transportation [6,7]. The chemical energy of hydrogen could efficiently transfer to electricity via electrochemical device such as proton exchange membrane fuel cells (PEMFCs) [8–10]. However, the cathodic oxygen reduction reaction (ORR) *Corresponding author (email: [email protected])
suffers seriously from sluggish reaction kinetics and multiple proton-coupled electron transfer process [11–13], which largely impedes the widespread commercialization of PEMFCs [14–16]. Plenty of electrocatalysts for ORR have been reported with enhanced active site exposure in recent years [17–19], such as synthesizing hierarchical structure of electrocatalysts, decreasin
Data Loading...
