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Preparation method of Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst

A ni-fe-co-ce, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low loading, high apparent activity, etc., to achieve the preparation process Simple and feasible, mild reaction conditions, low cost effect

Active Publication Date: 2020-01-21
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, transition metal phosphides exhibit high reactivity and good stability, and thus have received more and more attention. However, the design of transition metal phosphide catalysts with low loading, high apparent activity, and high intrinsic activity still faces challenges Huge challenge, but also a difficulty in the research and development of this type of catalyst

Method used

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  • Preparation method of Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst
  • Preparation method of Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst
  • Preparation method of Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst

Examples

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Embodiment 1

[0034] Weigh the medicine containing four elements of Ce-Co-Ni-Fe with analytical purity, cerium nitrate, cobalt nitrate, iron nitrate, nickel chloride according to the ratio of cerium element, cobalt element, iron element and nickel element 3:1:1:1 Weigh the molar ratio (the masses of cerium nitrate, cobalt nitrate, ferric nitrate and nickel chloride are 0.035g, 0.031g, 0.043g, 0.025g respectively), put it into a 20ml beaker, add 10ml of water to dissolve. Add 800 μl H to the above solution 2 o 2 Let it stand for five minutes until the solution turns orange-yellow, then adjust the pH of the solution to 10.5 with ammonia water, then add 0.1g / ml NaBH 4 Solution 2.5ml and 0.25g / ml NaH 2 PO 2 2.5ml of the solution was uniformly stirred at 25°C for 6 hours. Let the above solution stand for 6 hours, centrifuge and wash to neutrality, and place the obtained sample in a vacuum drying oven at 70°C for 12 hours in vacuum to obtain an amorphous Ni-Fe-Co-Ce quaternary with low overpo...

Embodiment 2

[0038] Weigh the medicine containing Ce-Ni-Fe-Co four elements of analytical purity, cerium chloride, cobalt chloride, nickel nitrate, iron nitrate according to cerium element, nickel element, iron element and cobalt element 4:2:1: 1 molar ratio (the mass of cerium chloride, nickel chloride, ferrous chloride, and cobalt chloride are 0.035g, 0.038g, 0.016g, 0.019g respectively), put into a 20ml beaker by weighing, add 10ml of water to dissolve. Add 800 μl H to the above solution 2 o 2 Until the solution turns orange-yellow, adjust the pH of the solution to 11 with ammonia water, then add 0.1g / ml NaBH 4 Solution 2.5ml and 0.25g / ml NaH 2 PO 2 2.5ml of the solution was uniformly stirred at 25°C for 6 hours. The above solution was left to stand for 6 hours, centrifuged and washed to neutrality, and the obtained sample was placed in a vacuum drying oven at 70°C for 12 hours in vacuum to obtain an amorphous Ni-Fe-Co-Ce quaternary with low overpotential PB oxygen evolution catal...

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Abstract

The invention discloses a preparation method of an amorphous Ni-Fe-Co-Ce quaternary PB catalyst material with low oxygen evolution overpotential. The quaternary PB catalyst is mainly prepared by doping CeCo and other metals through a homogeneous precipitation method at normal temperature and utilizing the synergistic effect of the metals and the combined effect of phosphide borides, so that the oxygen evolution overpotential of electrochemical performance reaches 260 mV, and the quaternary PB catalyst has good performance in the field of electrochemical catalysts. The invention aims to providethe amorphous Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst which is simple in synthesis process, mild in reaction condition, high in repeatability and low in overpotential, and the amorphous Ni-Fe-Co-Ce quaternary PB oxygen evolution catalyst has important significance in further development of phosphide materials in the field of electrochemical oxygen evolution catalysts.

Description

technical field [0001] The invention belongs to a method for preparing a multi-metal doped PB compound, in particular to a method for preparing a Ni-Fe-Co-Ce quaternary PB compound used in an oxygen evolution reaction. Background technique [0002] With the continuous deepening of industrialization, the problems of excessive energy consumption and environmental pollution have become more and more prominent. Therefore, finding safe, clean and efficient renewable new energy has become one of the research hotspots. As a zero-pollution, renewable and clean energy, countries all over the world place the development of hydropower in a strategic position in energy development. The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are two half-reactions that constitute the water splitting reaction in the field of electrochemical catalysis. Among them, the OER process involves the transfer of four electrons, which is a kinetically slow reaction process. The overp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCB01J27/1853C25B1/04C25B11/075Y02E60/36
Inventor 高发明游欢欢位阔王博李贺恩
Owner YANSHAN UNIV
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