多孔碳材料的制备及其金属磷化物氧还原性能研究

doi:10.19964/j.issn.1006-4990.2022-0426

Abstract

Abstract:

Porous carbon materials and their metal phosphides have broad application prospects in electrocatalytic oxygen reduction reactions.Melamine was used as the carbon source and nitrogen source，and diammonium hydrogen phosphate was used as the phosphorus source，N and P co-doped hollow carbon nanoshells were prepared with ultra-high specific surface area.The preparation of porous carbon materials with high specific surface area was realized by adjusting the phosphorus source.The melamine，diammonium hydrogen phosphate and iron precursor were compounded to obtain N，P co-doped graphitic carbon coated with iron phosphide nanoparticles.There was electronic interaction between the graphite carbon layer and the iron phosphide，and electrons transfered from the inside iron phosphide to the outer layer of graphitic carbon.This interface interaction greatly improved ORR activity.The half wave potential of the catalyst was up to 0.9 V.At the same time，the carbon layer played a role in protecting iron phosphide nanoparticles from oxidation and dissolution，and finally the catalyst exhibited excellent stability.

Key words: porous carbon materials, doping, electrocatalysis, iron phosphide

CLC Number:

TB383

WU Luming, YU Haibin, WANG Yaquan. Study on preparation of porous carbon materials and oxygen reduction properties of their metal phosphide[J]. Inorganic Chemicals Industry, 2023, 55(4): 104-110.

Figures/Tables 8

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References 19

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样品	S_BET/（m²∙g^-1）	V_tot/（cm³∙g^-1）	d_meso/nm
PNC-1	1 420	2.40	6.7
PNC	1 808	2.67	8.0
PNC-2	1 642	2.58	6.3
PNC-3	1 240	2.47	6.3

样品	C原子分数/%	O原子分数/%	N原子分数/%	P原子分数/%	Fe原子分数/%
FeP@PNC-1	90.0	6.7	1.7	1.3	0.3
FeP@PNC	86.0	8.7	2.2	2.7	0.7
FeP@PNC-3	86.1	7.1	2.3	3.5	1.1
FeP@PNC-2	86.5	8.5	1.1	3.2	0.8
Fe₃C@NC	86.4	12.5	1.0	—	0.2
FeP@PC	80.8	17.2	—	1.7	0.3

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Study on preparation of porous carbon materials and oxygen reduction properties of their metal phosphide

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