journal article·2022-03

Epitaxial Growth of Ultrathin Highly Crystalline Pt–Ni Nanostructure on a Metal Carbide Template for Efficient Oxygen Reduction Reaction

Hui Ding, Peng Wang, Caijie Su, Hongfei Liu, Xiaolin Tai, Nan Zhang, Haifeng Lv, Yue Lin, Wangsheng Chu, Xiaojun Wu, Changzheng Wu, Yi Xie

Advanced Materials· Volume 34· Issue 12
Publisher page

Abstract

Abstract Structure engineering strategies such as core–shell and hollow nanostructures are effective pathways to improve the utilization of noble metals for catalysis. However, nowadays materials design based on these strategies still largely rely on precious metal templates. Herein, the epitaxial growth of highly crystalline Pt3Ni overlayer on earth‐abundant nickel carbide is reported, forming Ni3C@Pt3Ni core–shell nanoparticles with a well‐defined interface through a new lattice‐match‐directed synthetic strategy. Derived from such core–shell nanostructures, ultrathin highly crystalline Pt3Ni nanocages have an advantageous configuration of oxygen reduction reaction (ORR)‐favored facets and inherently high active surface area for the ORR, bringing high mass activity and specific activity as much as 4.71 A mgPt−1 and 5.14 mA cm−2, which are 26 and 20 times to that of commercial Pt/C, respectively. This novel epitaxial growth of platinum opens up new avenues to rationally design highly active and economical electrocatalysts.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced Memory and Neural Computing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry and Materials Sciences CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) University of Science and Technology of China Hefei 230026 P. R. China

School of Chemistry and Materials Sciences CAS Key Laboratory of Materials for Energy Conversion CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230026 P. R. China

National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 P. R. China

Institute of Energy Hefei Comprehensive National Science Center Hefei 230026 P. R. China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities

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