Utilizing in-situ polymerization of pyrrole to fabricate composited hollow nanospindles for boosting oxygen evolution reaction

被引：35

作者：

Chen, Yixin ^{[1
]}

Shen, Lin ^{[1
]}

Wang, Congcong ^{[1
]}

Feng, Siyang ^{[1
]}

Zhang, Nan ^{[1
]}

Xiang, Siyuan ^{[1
]}

Feng, Tanglue ^{[1
]}

Yang, Mingxi ^{[1
]}

Zhang, Kai ^{[1
]}

Yang, Bai ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 274卷

关键词：

In-situ polymerization; Hollow nanostructrues; Electrochemical oxygen evolution reaction; Metal-organic framework; METAL; ELECTROCATALYSTS; NANOSHEETS;

D O I：

10.1016/j.apcatb.2020.119112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The fabrication of electrocatalysts with excellent activity for oxygen evolution reaction is still a challenge, due to the high energy barriers of OER which is a four-electron-transfer process. Here we designed a novel inorganic/polymer composited hollow nanospindles consist of polypyrrole (PPy) and Fe-Ni (oxy)hydroxides (FeNi-PPy HNSs) by in-situ polymerization on MIL-88(FeNi) because of the strong oxidation of Fe3+. FeNi-PPy HNSs could be used as electrocatalyst for OER directly, and high temperature sintering is not necessary. To achieve 10 and 100 mA.cm(-2), the FeNi-PPy HNSs only need low overpotential of 227 and 273 mV, respectively. As shown in results of DFT, profiting from the in-situ polymerization, the metal-N coordinate bonds could enhance the performance for OER by reducing the dissociation energy of OH- and promoting the adsorption of OH- in (oxy) hydroxide. This in-situ polymerization method on MOFs to fabricate hollow nanostructures would be a potential pathway to construct highly efficient electrocatalysts.

引用

页数：8

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