Fluorophosphates as Efficient Bifunctional Electrocatalysts for Metal-Air Batteries

被引:34
作者
Sharma, Lalit [1 ]
Gond, Ritambhara [1 ]
Senthilkumar, Baskar [1 ]
Roy, Ahin [2 ]
Barpanda, Prabeer [1 ]
机构
[1] Indian Inst Sci, Faraday Mat Lab, Mat Res Ctr, CV Raman Ave, Bangalore 560012, Karnataka, India
[2] Indian Inst Sci, Mat Res Ctr, CV Raman Ave, Bangalore 560012, Karnataka, India
关键词
fluorophosphates; bifunctional; electrocatalyst; air battery; efficiency; DOPED MESOPOROUS CARBON; ONE-POT SYNTHESIS; OXYGEN REDUCTION; COMBUSTION SYNTHESIS; POTENTIAL CATALYST; ELECTRODE; GRAPHENE; ION; EVOLUTION; HYBRID;
D O I
10.1021/acscatal.9b03686
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
An efficient bifunctional catalyst still remains a stupendous challenge for the use of energy storage devices such as rechargeable metal-air batteries and fuel cells as the current electrocatalysts are either oxygen reduction reaction (ORR) or oxygen evolution reaction (OER) selective and suffer from cost and stability issues. Co-phosphate-based bifunctional materials can be a plausible option owing to the enhanced stability imparted by the phosphate group. Inspired by the possibility, we report solution combustion synthesized porous Na2CoPO4F as a bifunctional electrocatalyst. Comparable to the existing conventional electrocatalysts, porous Na2CoPO4F exhibits robust bifunctional (ORR/OER) properties. Having F-based chemistry, the dissolution is minimal in an aqueous medium, paving a way for its use as a cathode for the aqueous rechargeable hybrid Na-air battery. Thus, based on the bifunctional catalytic performances and stability in an aqueous medium, this material can be envisaged as a cheap and an efficient catalyst for fuel cell as well as a cathode for metal-air batteries.
引用
收藏
页码:43 / 50
页数:15
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