Effect of Preparation Process of La0.95FeO3-δ/C Composite Electrode on Preparation and Bifunctional Electrocatalytic Properties

doi:10.16183/j.cnki.jsjtu.2021.009

Abstract

Abstract:

In order to optimize the bifunctional electrocatalytic performance of La_0.95FeO_3-_δ, the effects and influencing mechanism of carbon morphology, electrode ink preparation, and catalyst loading on the bifunctional electrocatalytic performance of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were investigated. The results show that compared with La_0.95FeO_3-_δ, the catalytic activity of La_0.95FeO_3-_δ/C is significantly improved. The bifunctional electrocatalytic performance of La_0.95FeO_3-_δ/C is mainly dependent on carbon morphology and electrode ink preparation. An optimum bifunctional performance is achieved in a composite electrode with 0.6 mg/cm² La_0.95FeO_3-_δ and 0.12 mg/cm² EC600JD prepared by ultrasonic dispersion, ball milling, and ultrasonic dispersion. The optimized La_0.95FeO_3-_δ/C has an excellent bifunctional electrocatalytic performance, simple preparation, and low cost, which is expected to be applied in Li-O₂ batteries.

Key words: LaFeO₃ perovskite, oxygen reduction reaction(ORR), oxygen evolution reaction(OER), bifunctional electrocatalyst, electrocatalysis

CLC Number:

HU Huanming, YANG Fan, ZHANG Junliang. Effect of Preparation Process of La_0.95FeO_3-_δ/C Composite Electrode on Preparation and Bifunctional Electrocatalytic Properties[J]. Journal of Shanghai Jiao Tong University, 2021, 55(9): 1049-1057.

Figures/Tables 13

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Tab.5

Bifunctional electrocatalytic indexes of different active materialsV

活性材料	φ_ORR	η_ORR	φ_OER	η_OER	Δφ
La_0.95FeO_3-_δ (本文)	0.75	0.48	1.76	0.53	1.01
La_0.95Fe $O 3 - δ$ ^[16]	0.58	0.65	1.64	0.41	1.06
磷掺杂LaFe $O 3$ ^[17]	0.72	0.51	1.69	0.46	0.97
LaFeO_3-_x纳米片^[15]	0.57	0.66	1.78	0.55	1.21
La_0.58Sr_0.4Co_0.5Fe_0.5 $O 3 - δ$ ^[19]	0.67	0.56	1.72	0.49	1.05
Pt/C^[20]	0.97	0.26	2.19	0.96	1.22
Ir $O 2$ ^[20]	0.38	0.85	1.70	0.47	1.32
Ru $O 2$ ^[20]	0.54	0.69	1.64	0.41	1.10

Tab.5

References 20

[1]	GRIMAUD A, DIAZ-MORALES O, HAN B, et al. Activating lattice oxygen redox reactions in metal oxides to catalyse oxygen evolution[J]. Nature Chemistry, 2017, 9(5):457-465. doi: 10.1038/nchem.2695 URL
[2]	GASTEIGER H A, KOCHA S S, SOMPALLI B, et al. Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs[J]. Applied Catalysis B: Environmental, 2005, 56(1/2):9-35. doi: 10.1016/j.apcatb.2004.06.021 URL
[3]	TRASATTI S. Electrocatalysis in the anodic evolution of oxygen and chlorine[J]. Electrochimica Acta, 1984, 29(11):1503-1512. doi: 10.1016/0013-4686(84)85004-5 URL
[4]	GNANAMUTHU D S, PETROCELLI J V. A gene-ralized expression for the tafel slope and the kinetics of oxygen reduction on noble metals and alloys[J]. Journal of the Electrochemical Society, 1967, 114(10):1036. doi: 10.1149/1.2424180 URL
[5]	JI Q Q, BI L, ZHANG J T, et al. The role of oxygen vacancies of ABO₃ perovskite oxides in the oxygen reduction reaction[J]. Energy & Environmental Science, 2020, 13(5):1408-1428.
[6]	ZHU Y L, ZHOU W, SHAO Z P. Perovskite/carbon composites: Applications in oxygen electrocatalysis[J]. Small, 2017, 13(12):1603793. doi: 10.1002/smll.v13.12 URL
[7]	SUNTIVICH J, GASTEIGER H A, YABUUCHI N, et al. Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal-air batteries[J]. Nature Chemistry, 2011, 3(7):546-550. doi: 10.1038/nchem.1069 URL
[8]	SUNTIVICH J, MAY K J, GASTEIGER H A, et al. A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles[J]. Science, 2011, 334(6061):1383-1385. doi: 10.1126/science.1212858 URL
[9]	MEFFORD J T, RONG X, ABAKUMOV A M, et al. Water electrolysis on La₁-_xSr_xCoO₃-_δ perovskite electrocatalysts[J]. Nature Communications, 2016, 7(1):1-11.
[10]	XU J J, WANG Z L, XU D, et al. 3D ordered macroporous LaFeO₃ as efficient electrocatalyst for Li-O2 batteries with enhanced rate capability and cyclic performance[J]. Energy & Environmental Science, 2014, 7(7):2213.
[11]	张晓茹, 许跃峰, 沈守宇, 等. 锂氧电池双功能还原石墨烯-LaFeO₃复合纳米催化剂的制备及性能[J]. 物理化学学报, 2017, 33(11):2237-2244.
	ZHANG Xiaoru, XU Yuefeng, SHEN Shouyu, et al. Reduced graphene oxide-LaFeO₃ composite nanomaterials as bifunctional catalyst for rechargeable lithium-oxygen batteries[J]. Acta Physico-Chimica Sinica, 2017, 33(11):2237-2244.
[12]	ZHU Y L, ZHOU W, YU J, et al. Enhancing electrocatalytic activity of perovskite oxides by tuning cation deficiency for oxygen reduction and evolution reactions[J]. Chemistry of Materials, 2016, 28(6):1691-1697. doi: 10.1021/acs.chemmater.5b04457 URL
[13]	LENG J, LI S, WANG Z S, et al. Synjournal of ultrafine lanthanum ferrite (LaFeO₃) fibers via electrospinning[J]. Materials Letters, 2010, 64(17):1912-1914. doi: 10.1016/j.matlet.2010.06.005 URL
[14]	XU J J, WANG Z L, XU D, et al. 3D ordered macroporous LaFeO₃ as efficient electrocatalyst for Li-O2 batteries with enhanced rate capability and cyclic performance[J]. Energy & Environmental Science, 2014, 7(7):2213.
[15]	GAO R, CHEN Q Z, ZHANG W J, et al. Oxygen defects-engineered LaFeO₃-_x nanosheets as efficient electrocatalysts for lithium-oxygen battery[J]. Journal of Catalysis, 2020, 384:199-207. doi: 10.1016/j.jcat.2020.02.024 URL
[16]	ZHU Y L, ZHOU W, YU J, et al. Enhancing electrocatalytic activity of perovskite oxides by tuning cation deficiency for oxygen reduction and evolution reactions[J]. Chemistry of Materials, 2016, 28(6):1691-1697. doi: 10.1021/acs.chemmater.5b04457 URL
[17]	LI Z S, LÜ L, WANG J S, et al. Engineering phosphorus-doped LaFeO₃-_δ perovskite oxide as robust bifunctional oxygen electrocatalysts in alkaline solutions[J]. Nano Energy, 2018, 47:199-209. doi: 10.1016/j.nanoen.2018.02.051 URL
[18]	KRIEG A S, KING J A, JASZCZAK D C, et al. Tensile and conductivity properties of epoxy composites containing carbon black and graphene nanoplatelets[J]. Journal of Composite Materials, 2018, 52(28):3909-3918. doi: 10.1177/0021998318771460 URL
[19]	PARK H W, LEE D U, ZAMANI P, et al. Electrospun porous nanorod perovskite oxide/nitrogen-doped graphene composite as a bi-functional catalyst for metal air batteries[J]. Nano Energy, 2014, 10:192-200. doi: 10.1016/j.nanoen.2014.09.009 URL
[20]	RINCÓN R A, MASA J, MEHRPOUR S, et al. Activation of oxygen evolving perovskites for oxygen reduction by functionalization with Fe-N_x/C groups[J]. Chemical Communications, 2014, 50(94):14760-14762. doi: 10.1039/C4CC06446A URL

导电碳	比表面积/ (m²·g^-1)	堆密度/ (g·cm^-3)	电导率/ (S·cm^-1)
CNT	> 150	0.22	> 100
EC600JD	> 1200	0.10~0.12	10~100^[18]

电极组成		载量/(mg·cm^-2)		浆料制备方法
活性物质	导电碳	活性物质	导电碳	浆料制备方法
La_0.95FeO_3-_δ	CNT	0.50	0.10	方法1
	EC600JD	0.50	0.10	方法1
		0.60	0.12	方法1
		0.60	0.12	方法2
		0.60	0.12	方法3
		0.50	0.10	方法3
		0.60	0.12	方法3
		0.75	0.25	方法3
		0.60	0	方法3
		0	0.12	方法3

浆料制备方法	η_ORR/mV	η_OER/mV
方法1	590	>600
方法2	500	570
方法3	480	530

La_0.95FeO_3-_δ载量/(mg·cm^-2)	η_ORR/mV	η_OER/mV
0.50	495	532
0.60	480	530
0.75	495	524