Preparation method of bimetallic MOF derived oxygen evolution electrocatalyst

An electrocatalyst, bimetallic technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as inability to meet industrial applications, poor conductivity, etc., and achieve good application prospects, excellent performance, Prepare simple effects

CN110227524AInactive Publication Date: 2019-09-13GUANGDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-09-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

Belonging to the technical field of new energy materials, the invention in particular relates to a preparation method of a bimetallic MOF derived oxygen evolution electrocatalyst. The preparation method of the bimetallic MOF derived oxygen evolution electrocatalyst includes: subjecting an iron salt solution, a nickel salt solution, L-glutamic acid and an organic ligand to mixing reaction, and drying and carbonizing the obtained product, thus obtaining the bimetallic MOF derived oxygen evolution electrocatalyst. The preparation method of the bimetallic MOF derived oxygen evolution electrocatalyst provided by the invention solves the technical problem that the existing transition metal OER catalyst cannot meet industrial application due to poor stability and electrical conductivity.
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Description

technical field

[0001] The invention belongs to the technical field of new energy materials, and in particular relates to a preparation method of an oxygen evolution electrocatalyst derived from a bimetallic MOF. Background technique

[0002] The dwindling natural energy resources and the sharp increase in energy demand have made the development of new energy sources a hot topic for scientists. In search of efficient and sustainable energy conversion and storage solutions, electrocatalytic oxygen evolution has been extensively studied in recent decades. Oxygen evolution reaction (OER), as an important half-reaction occurring in anodic half-cells, is an essential and decisive step in many novel energy conversion and storage processes / devices, such as water splitting and rechargeable metal-air batteries . However, OER is a very harsh electrochemical reaction, and the following reactions occur in acidic and alkaline environments: It can be seen from the reaction equations (...

Examples

Embodiment 1

[0044] Table 1 Fe prepared with different molar ratios of Fe and Ni y Ni 4-y C x catalyst

[0045] Catalyst name Molar ratio of Fe to Ni Fe 4 Ni 0 C x

4：0.01 Fe 3 Ni 1 C x

3：1 Fe 2 Ni 2 C x

2：2 Fe 1 Ni 3 C x

1：3 Fe 0 Ni 4 C x

0.01：4

[0046] Fe and Ni molar ratios of different Fe and Ni molar ratios as shown in Table 1 were prepared respectively. y Ni 4-y C x Catalyst, Fe when L-glutamic acid is 1mmol and trimesic acid is 1.34mmol 1 Ni 3 C x For example, the specific preparation process is as follows:

[0047] (1) 1mmol Fe(CH 3 COO) 2 , 3mmol Ni(CH 3 COO) 2 and 1mmol L-glutamic acid were added to 80mL deionized water and stirred rapidly to dissolve completely, marked as A 1 solution; at the same time, add 1.34mmol trimesic acid into 80mL absolute ethanol and stir rapidly to dissolve it completely, marked as B 1 solution. Subsequently, the B 1 The solution is quickly poured int...

Embodiment 2

[0054] Table 2 Fe using different molar amounts of L-glutamic acid y Ni 4-y C x catalyst

[0055] Catalyst name Molar amount of L-glutamic acid (mmol) Fe 1 Ni 3 C x -0(0.01mmol)

0.01 Fe 1 Ni 3 C x -1(1mmol)

1 Fe 1 Ni 3 C x -2(2mmol)

2

[0056] Prepare the Fe of L-glutamic acid of different consumptions as shown in table 2 respectively y Ni 4-y C x Catalyst, with Fe(CH 3 COO) 2 1mmol, Ni(CH 3 COO) 2 3mmol, Fe when trimesic acid is 1.34mmol 1 Ni 3 C x -1 (1mmol) as an example, the specific preparation process is as follows:

[0057] (1) 1mmol Fe(CH 3 COO) 2 , 3mmol Ni(CH 3 COO) 2 and 1mmol L-glutamic acid were added to 80mL deionized water and stirred rapidly to dissolve completely, marked as A 2 solution; at the same time, add 1.34mmol trimesic acid into 80mL absolute ethanol and stir rapidly to dissolve it completely, marked as B 2 solution. Subsequently, the B 2 The solution is quickly poured into A...

Embodiment 3

[0063] Table 3 Fe prepared by using different molar amounts of trimesic acid y Ni 4-y C x catalyst

[0064] Catalyst name Molar amount of trimesic acid (mmol) Fe 1 Ni 3 C x -0.67 (0.67mmol)

0.67 Fe 1 Ni 3 C x -1.34 (1.34mmol)

1.34 Fe 1 Ni 3 C x -2.01 (2.01mmol)

2.01

[0065] Prepare the Fe of trimesic acid in different amounts as shown in table 3 respectively y Ni 4-y C x Catalyst, with Fe(CH 3 COO) 2 1mmol, Ni(CH 3 COO) 2 3mmol, Fe when L-glutamic acid is 1mmol 1 Ni 3 C x -1.34 (1.34mmol) as an example, the specific preparation process is as follows:

[0066] (1) 1mmol Fe(CH 3 COO) 2 , 3mmol Ni(CH 3 COO) 2 and 1mmol L-glutamic acid were added to 80mL deionized water and stirred rapidly to dissolve completely, marked as A 3 solution; at the same time, add 1.34mmol trimesic acid into 80mL absolute ethanol and stir rapidly to dissolve it completely, marked as B 3 solution. Subsequently, the B 3 The sol...