Affiliation:
1. State Key Laboratory of Automotive Simulation and Control School of Materials Science and Engineering Key Laboratory of Automobile Materials of MOE Jilin University Changchun 130012 P. R. China
2. College of Chemistry Jilin University Changchun Jilin 130012 P. R. China
3. Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 P. R. China
Abstract
AbstractDelicate electrochemical active surface area (ECSA) engineering over the exposed catalytic interface and surface topology of platinum‐based nanomaterial represents an effective pathway to boost its catalytic properties toward the clean energy conversion system. Here, for the first time, the facial and universal production of dendritic Pt‐based nanoalloys (Pt‐Ni, Co, Fe) with highly porous feature via a novel Zn2+‐mediated solution approach is demonstrated. In the presence of Zn2+ during synthesis, the competition of different galvanic replacement reactions and consequently generated “branch‐to‐branch” growth mode are believed to play key roles for the in situ fabrication of such unique nanostructure. Due to the fully exposed active sites and ligand effect‐induced electronic optimization, electrochemical hydrogen evolution in alkaline media on these catalysts exhibit dramatic activity enhancement, delivering a current density of 30.6 mA cm−2 at a 70 mV overpotential for the Pt3Ni nanodendrites and over 7.4 times higher than that of commercial Pt/C. This work highlights a general and powerful ion‐assisted strategy for exploiting dendritic Pt‐based nanostructures with efficient activities for water electrolysis.
Funder
National Natural Science Foundation of China
National Postdoctoral Program for Innovative Talents
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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