Promoting Electrocatalytic Oxygen Reduction in a Model Composite Using Selective Metal Ions

被引：6

作者：

Ahmed, Zubair ^{[1
]}

Sachdeva, Parrydeep K. ^{[1
]}

Rai, Ritu ^{[1
]}

Kumar, Rajinder ^{[1
]}

Maruyama, Takahiro ^{[2
]}

Bera, Chandan ^{[1
]}

Bagchi, Vivek ^{[1
]}

机构：

[1] Inst Nano Sci & Technol, Mohali 160062, Punjab, India

[2] Meijo Univ, Dept Appl Chem, Tempa Ku, Nagoya, Aichi 4688502, Japan

来源：

ACS APPLIED ENERGY MATERIALS | 2020年 / 3卷 / 04期

关键词：

oxygen reduction reaction; electrocatalysis; transition metal phosphates; P-doped graphene; energy conversion; LONG-CYCLE-LIFE; AIR BATTERIES; CATALYSTS; CATHODE; ORR; NANOPARTICLES; GRAPHITE; COBALT;

D O I：

10.1021/acsaem.0c00129

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 oxygen reduction reaction (ORR) is critically important in energy converting systems, and the advancement of a catalyst that accelerates the process is vital. Here, an ORR electrocatalyst was developed by the stoichiometric addition of Co(II) ions to a model composite (FePH) and termed as gamma-CoFePH. The developed electrocatalyst shows a significant enhancement in ORR activity with improved E-onset and E-1/2 (3 mA cm(-2)) values, where E-1/2 is -0.29 V as compared to -0.60 V for FePH, drifting toward Pt/C and exhibits a limiting current density of -6.3 mA cm(-2) which exceeds the commercially available Pt/C. The gamma-CoFePH also displays superior resistance toward methanol poisoning and stability of over 40 000 s retaining 83.6% of the current density under alkaline medium.

引用

页码：3645 / 3652

页数：8

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