Cobalt-nitrogen co-doped carbon-based electrocatalyst material and preparation method thereof
An electrocatalyst and co-doping technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high catalyst cost, scarcity of precious metals, poor stability, etc., to improve catalytic performance, Improved catalytic activity and low cost
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[0048] Example 1
[0049] This embodiment provides a method for preparing a carbon-based electrocatalyst co-doped with cobalt and nitrogen, which is prepared by the following steps:
[0050] (1) Preparation of Co-TPM complex: the soluble cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) (1mmol) and TPM (2mmol) were dissolved in 10ml and 20ml of acetone solution respectively. During stirring, slowly add the cobalt salt-containing acetone solution to the TPM-containing acetone solution, and the mixture was stirred at room temperature for one Hours; the precipitate is collected by centrifugation, washed with ethanol, and dried in vacuum at room temperature to obtain a yellow powder, which is the Co-TPM complex;
[0051] (2) Preparation of precursor Co@MOF: 10ml of Zn(NO 3 ) 2 (2.9mmol) ammonia solution, 10ml 1H-pyrazole-4-carboxylic acid (H 2 PzC) (3mmol) in methanol and 40ml of Co-TPM (0.4mmol) in DMF were added to a round bottom flask and refluxed for 6h. The precipitate was collected...
Example Embodiment
[0053] Example 2
[0054] This embodiment provides a method for preparing a carbon-based electrocatalyst co-doped with cobalt and nitrogen, which is obtained through the following preparation steps:
[0055] (1) Preparation of Co-TPM complex: the soluble cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) (1mmol) and TPM (2mmol) were dissolved in 10ml and 20ml of acetone solution respectively. During the stirring, the cobalt salt-containing solution was slowly added to the TPM solution, and the mixture was stirred at room temperature for one hour; Collect the precipitate, wash with ethanol, and dry at room temperature to obtain a yellow powder, which is the Co-TPM complex;
[0056] (2) Preparation of Co@MOF anion MOF: 10ml of Zn(NO 3 ) 2 (2.8mmol) ammonia solution, 10ml 1H-pyrazole-4-carboxylic acid (H 2 PzC) (3 mmol) in methanol and 40 ml of Co-TPM (0.5 mmol) in DMF were added to a round bottom flask and refluxed for 6 hours. The precipitate was collected by centrifugation, washed thr...
Example Embodiment
[0058] Example 3
[0059] This embodiment provides a method for preparing a nitrogen-doped carbon-based electrocatalyst encapsulating cobalt nanoparticles, which is obtained through the following preparation steps:
[0060] (1) Preparation of Co-TPM complex: the soluble cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) (1mmol) and TPM (2mmol) were dissolved in 10ml and 20ml of acetone solution respectively. During the stirring, the cobalt salt-containing solution was slowly added to the TPM solution, and the mixture was stirred at room temperature for one hour; Collect the precipitate, wash with ethanol, and dry in vacuo to obtain a yellow powder, which is the Co-TPM complex;
[0061] (2) Preparation of Co@MOF anion MOF: 10ml of Zn(NO 3 ) 2 (3.1mmol) of ammonia solution, 10ml of 1H-pyrazole-4-carboxylic acid (H 2 PzC) (3 mmol) in methanol and 40 ml of Co-TPM (0.2 mmol) in DMF were added to a round bottom flask and refluxed for 6 hours. The precipitate was collected by centrifugation,...
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