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High‐Performance Oxygen Reduction Electrocatalysis Enabled by 3D PdNi Nanocorals with Hierarchical Porosity
Author(s) -
Liu Zhenyuan,
Yang Xiaoyu,
Cui Lirui,
Shi Zhaoping,
Lu Bingqing,
Guo Xiaomeng,
Zhang Jubing,
Xu Lin,
Tang Yawen,
Xiang Yan
Publication year - 2018
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201700366
Subject(s) - bimetallic strip , porosity , electrocatalyst , catalysis , materials science , nanostructure , nanotechnology , electrochemistry , durability , nanoparticle , oxygen reduction reaction , oxygen reduction , electrode , chemistry , composite material , biochemistry
Cost‐effective electrocatalysts for the oxygen reduction reaction (ORR) play pivotal roles in energy conversion and storage processes. Designing a 3D networked bimetallic nanostructure with hierarchical porosity represents a reliable and effective strategy for the advancement of electrocatalysts with greatly improved activity and stability. However, it still remains a tremendous challenge in fabricating such fantastic nanostructure via a feasible and economical approach. Herein, a facile cyanogel‐bridged synthetic strategy is demonstrated to fabricate PdNi 3D nanocorals with hierarchical porosity. The elaborate integration of electronic and geometric effects endows the as‐fabricated PdNi 3D nanocorals with substantially enhanced activity and durability toward the ORR, as compared with the monometallic counterparts (pure Ni and Pd), PdNi nanoparticles, and commercial Pd black catalyst. More importantly, even after 5000 cycles of accelerated durability tests, the PdNi nanocorals can still maintain well in the catalytic activities, composition, and architectural features. It is believed that the as‐synthesized PdNi nanocorals may hold great promise in practical fuel cells and industrial applications. Furthermore, due to its simplicity and scale‐up production capability, the present cyanogel‐bridged synthetic strategy provides an attractive method for achieving other bi/trimetallic nanoalloys with both structural and compositional advantages for diverse electrochemical applications and beyond.