Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of a carbon-coated transition metal phosphide composite and its application in oxygen evolution reaction

A technology of transition metals and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, electrolytic processes, etc., can solve problems such as flammability and toxicity, affect electrocatalytic activity, etc., achieve low price, improve catalytic activity, and prepare The effect of simple and easy operation

Active Publication Date: 2019-01-04
BEIJING UNIV OF CHEM TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a high content of inactive species Al will be formed during the synthesis of phosphides using this method 2 o 3 , thereby affecting the electrocatalytic activity; and red phosphorus will be used as a phosphorus source, and white phosphorus gas will be generated during the roasting process, which is flammable and toxic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of a carbon-coated transition metal phosphide composite and its application in oxygen evolution reaction
  • Preparation method of a carbon-coated transition metal phosphide composite and its application in oxygen evolution reaction
  • Preparation method of a carbon-coated transition metal phosphide composite and its application in oxygen evolution reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A. Add 7.2mmol Co(NO 3 ) 2 ·6H 2 O. Add 24mmol urea into 200mL beaker a, add 150mL carbon dioxide-free water, and dissolve it by ultrasonic. Add 3.6mmol monododecyl phosphate (SDP) into 150mL beaker b, add 90mL carbon dioxide-free water, and ultrasonically dissolve. Add the solution in bottle b, which is evenly mixed and dispersed, into bottle a, protect it with an inert atmosphere, stir for a period of time, then transfer the solution in a to an autoclave, crystallize at 150°C for 6 hours, and use it repeatedly to remove carbon dioxide after crystallization Washing with water and ethanol and centrifugation to pH 7, followed by drying at 70 °C for 24 h yielded highly dispersed needle-like SDP-intercalated Co(OH) 2 Precursor (XRD, SEM picture see figure 1 and figure 2 );

[0027] B. Co(OH) intercalated with the highly dispersed acicular SDP prepared in step A 2 The precursor is placed in a high-temperature atmosphere furnace, and H 2 / Ar gas, the flow rate is 60...

Embodiment 2

[0034] Other conditions are the same as in Example 1, except that the inorganic metal salt is nickel nitrate hexahydrate. The electrocatalytic performance test results are summarized in Table 1.

Embodiment 3

[0036] Other conditions are the same as in Example 1, except that the inorganic metal salt is cobalt sulfate hexahydrate. The electrocatalytic performance test results are summarized in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention first synthesizes a needle-shaped transition metal hydroxide precursor with anion intercalation containing both a phosphorus source and a carbon source between the layers, and then prepares a pod-shaped carbon-coated transition metal phosphide composite material through high-temperature roasting. This composite material is used in the cathode reaction-oxygen evolution reaction in electrolyzed water, and can effectively improve the performance of the catalyst, that is, reduce the starting potential, improve the catalytic activity, and has a long service life and good stability. At the same time, its raw materials are low in price, abundant in reserves, simple in preparation method and environmentally friendly. Under alkaline conditions of 0.1–1M KOH, the overpotential required to reach a current density of 10mA cm-2 is 280–340mV, the Tafel slope is 60–80mV / dec, and the cycle is performed at a constant voltage of 1.65V. The time is as long as 1-24 hours or more.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to the controlled preparation of carbon-coated transition metal phosphides by a special-morphology hydrotalcite-like intercalation precursor to form a pod-shaped composite material, which is applied to an oxygen evolution reaction catalyst electrode. Background technique [0002] With the increase of the earth's population and the rapid development of social economy, the demand for energy has become more tense. "Energy crisis" poses a challenge to the sustainable development of the ecological environment. Among them, traditional fossil energy (such as natural gas, coal, petroleum, etc.) is a non-renewable primary energy, which has low resource utilization efficiency and produces a large amount of harmful gases (such as greenhouse gas CO 2 , NO x , SO x Wait). New energy sources such as hydrogen energy, solar energy, and wind energy are clean, pollution-f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/14B01J27/185C25B11/06C25B1/02
CPCC25B1/02B01J27/14B01J27/1853C25B11/091B01J35/00B01J35/30B01J35/33
Inventor 徐赛龙李婉张法智
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com