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RhPdPt metal nanoalloy catalyst and application thereof

A ternary metal, nano-alloy technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, nanotechnology, etc., can solve the problem that ternary metal nano-alloy catalysts have not been reported. , to achieve the effect of superior catalytic performance

Inactive Publication Date: 2015-01-28
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as (Da-Bing Huang, Qiang Yuan, Hong-Hui Wang, Zhi-You Zhou. facile synthesis of PdPtnanoalloy with sub-2 nm island as robust electrocatalysts for methanol oxidation. Chemical Communication. 2014, 50, 13551-13554.) But , and island-based ternary metal nanoalloy catalysts have not been reported yet
Moreover, the ternary metal nanoalloy catalyst with an island structure has better catalytic performance than the PdPt binary metal nanoalloy catalyst with an island structure.

Method used

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  • RhPdPt metal nanoalloy catalyst and application thereof
  • RhPdPt metal nanoalloy catalyst and application thereof
  • RhPdPt metal nanoalloy catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Rh 10 PD 30 Pt 60 The preparation of ternary alloy nano-catalyst is as follows

[0025] (1) Configuration of the solution

[0026] H 2 PtCl 6 、Na 2 PdCl 4 and RhCl 3 Prepare 0.1 mol / L solution respectively, citric acid monohydrate and CTAC prepare 0.22 mol / L solution;

[0027] (2) Preparation of flocculent solution

[0028] Take 4.5 ml of 0.22 mol / L citric acid monohydrate and 4.5 ml of 0.22 mol / L CTAC, and then add 100ul of RhCl in proportion 3 (0.1 mol / L), 300 ul of Na 2 PdC 4 and 600 ul of H 2 PtCl 6 solution. At room temperature, stir magnetically to form a flocculent solution;

[0029] (3) Island structure Rh 10 PD 30 Pt 60 Preparation of Ternary Alloy Catalyst

[0030] Transfer the flocculent solution in step (2) to a 15 ml hydrothermal reaction kettle, react at 180 °C for 60 minutes, cool to room temperature, wash the obtained precipitate with ultrapure water 4 times, and then place it in a vacuum dryer dry in medium to obtain an island-like R...

Embodiment 2

[0032] Rh 10 PD 40 Pt 50 The preparation of ternary alloy nano-catalyst is as follows

[0033] (1) Configuration of the solution

[0034] H 2 PtCl 6 、Na 2 PdCl 4 and RhCl 3 Prepare 0.1 mol / L solution respectively, citric acid monohydrate and CTAC prepare 0.22 mol / L solution;

[0035] (2) Preparation of flocculent solution

[0036] Take 4.5 ml of 0.22 mol / L citric acid monohydrate and 4.5 ml of 0.22 mol / L CTAC, and then add 100 ul of RhCl in proportion 3 (0.1 mol / L), 400 ul of Na 2 PdCl 4 and 500 ul of H 2 PtCl 6 solution. At room temperature, stir magnetically to form a flocculent solution;

[0037] (3) Island structure Rh 10 PD 40 Pt 50Preparation of Ternary Alloy Catalyst

[0038] Transfer the flocculent solution in step (2) to a 15 ml hydrothermal reaction kettle, react at 180°C for 60 minutes, cool to room temperature, wash the obtained precipitate with ultrapure water 4 times, and then place it in a vacuum desiccator dry in medium to obtain an island-l...

Embodiment 3

[0040] Rh 10 PD 70 Pt 120 The preparation of ternary alloy nano-catalyst is as follows

[0041] (1) Configuration of the solution

[0042] H 2 PtCl 6 、Na 2 PdCl 4 and RhCl 3 Prepare 0.1 mol / L solution respectively, citric acid monohydrate and CTAC prepare 0.22 mol / L solution;

[0043] (2) Preparation of flocculent solution

[0044] Take 4.5 ml of 0.22 mol / L citric acid monohydrate and 4.5 ml of 0.22 mol / L CTAC, and then add 50 ul of RhCl in proportion 3 (0.1mol / L), 350 ul of Na 2 PdCl 4 and 600 ul of H 2 PtCl 6 solution. At room temperature, stir magnetically to form a flocculent solution;

[0045] (3) Island structure Rh 10 PD 70 Pt 120 Preparation of Ternary Alloy Catalyst

[0046] Transfer the flocculent solution in step (2) to a 15 ml hydrothermal reaction kettle, react at 180 °C for 60 minutes, cool to room temperature, wash the obtained precipitate with ultrapure water 4 times, and then place it in a vacuum dryer dry in medium to obtain an island-like...

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PUM

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Abstract

The invention discloses an RhPdPt metal nanoalloy catalyst and application thereof, and relates to the field of fuel cell catalysts. The RhPdPt metal nanoalloy catalyst is RhxPdyPtz metal nanoalloy formed by mixing Rh, Pd and Pt according to a certain ratio and has an island structure, the overall size of alloy particles is 34+ / -3.0 nm, sub-2 nanoscale small island particles are uniformly distributed at the peripheries of the particles, and the particle size of each small particle is 1.77+ / -0.03 nm, wherein x is 10, y is 30-70, and z is 50-120. The RhPdPt metal nanoalloy serving as a catalyst has high catalytic activity and anti-poisoning performance on fuel cells of methanol, ethanol, formic acid and the like, and can be used as a three-way catalyst for automobile exhaust treatment.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a RhPdPt ternary metal nano-alloy catalyst and its application. Background technique [0002] Due to its high energy conversion rate and low environmental pollution, fuel cells are conducive to reducing the excessive use of traditional fossil fuels and protecting the global environment. A lot of manpower, material resources, and financial resources have been invested in research. Pt catalysts have attracted extensive attention due to their excellent catalytic activity and stability. However, due to its scarce reserves and high price on the earth, the commercial use of fuel cells is greatly limited, and Pt will produce intermediate product CO when oxidizing some fuels, and CO will occupy the active sites on the surface of Pt, making Pt The catalyst is poisoned, thereby reducing the electrochemical activity and stability of Pt. At present, the alloying of Pt is a common method...

Claims

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Application Information

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IPC IPC(8): B01J23/46H01M4/92B82Y30/00
CPCY02E60/50
Inventor 黄大兵袁强
Owner GUIZHOU UNIV
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