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A Non‐Pt Electronically Coupled Semiconductor Heterojunction for Enhanced Oxygen Reduction Electrocatalytic Property
Author(s) -
Li Fan,
Qin Yong,
Chalgin Aleksei,
Gu Xin,
Chen Wenlong,
Ma Yanling,
Xiang Qian,
Wu Yi,
Shi Fenglei,
Zong Yuan,
Tao Peng,
Song Chengyi,
Shang Wen,
Deng Tao,
Zhu Hong,
Wu Jianbo
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900615
Subject(s) - electrocatalyst , x ray photoelectron spectroscopy , density functional theory , materials science , catalysis , heterojunction , proton exchange membrane fuel cell , chemical engineering , chemistry , electrode , computational chemistry , optoelectronics , electrochemistry , biochemistry , engineering
Abstract Hybrid faceted‐Ag 3 PO 4 /cube‐Cu 2 O composite materials have been fabricated and employed as oxygen reduction electrocatalysts for proton exchange membrane fuel cells (PEMFCs). The charge separation effect via the formation of PN junction has been demonstrated to boost the electrocatalysis toward oxygen reduction reaction. The as‐prepared rhombic dodecahedron‐Ag 3 PO 4 /cube‐Cu 2 O/C hybrid catalyst shows a mass‐specific activity of 109.80 mA/mg Ag , which is about 6.4 times that of pure rhombic dodecahedron‐Ag 3 PO 4 /C catalyst (17.20 mA/mg Ag ). The density functional theory (DFT) calculation based on the density of states (DOS) further proved the optimal tunable effect, which is in pace with demonstration of electron transfer direction revealed by X‐ray photoelectron spectroscopy (XPS) analysis. Our work establishes a theoretical and practical basis for the rational design of newly non‐Pt hybrid catalysts, moreover, advances the future efficient application of PEMFCs.