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粉末冶金材料科学与工程 >

2025 , Vol. 30 >Issue 4: 325 - 342

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2025036

工艺技术

快速合成超细CuSnNi纳米颗粒催化剂的CO2电化学还原性能

  • 张莹萍 ,
  • 宋逸剑 ,
  • 李维杰 ,
  • 周承商 ,
  • 刘咏 ,
  • 韩朝
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  • 1.中南大学 粉末冶金研究院,长沙 410083;
    2.中南大学 材料科学与工程学院,长沙 410083

收稿日期: 2025-04-09

  修回日期: 2025-05-28

  网络出版日期: 2025-10-13

收起

CO2 electrochemical reduction performance of rapidly synthesized ultrafine CuSnNi nanoparticle catalysts

  • ZHANG Yingping ,
  • SONG Yijian ,
  • LI Weijie ,
  • ZHOU Chengshang ,
  • LIU Yong ,
  • HAN Chao
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  • 1. Powder Metallurgy Research Institute, Central South University, Changsha 410083, China;
    2. School of Materials Science and Engineering, Central South University, Changsha 410083, China

Received date: 2025-04-09

  Revised date: 2025-05-28

  Online published: 2025-10-13

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摘要

采用液相还原法合成结构有序,尺寸超小,Cu、Sn、Ni原子比分别为1∶1∶1、2∶1∶1、1∶2∶1、1∶1∶2的4组CuSnNi纳米颗粒催化剂,探究其CO2电化学还原性能及催化机理。结果表明：4组催化剂都能将CO2转化为合成气(CO+H2)和HCOOH,Cu、Sn、Ni原子比为2∶1∶1时,催化产物HCOOH+CO的法拉第效率可达到40%,其中HCOOH选择性可达到29%,合成气中H2/CO物质的量比在所有电位范围内都保持在4~5;而Cu、Sn、Ni原子比为1∶1∶2时,H2/CO物质的量比可调范围最大(5~17),H2/CO物质的量比与元素比有关,而与熵值无关。Cu、Sn、Ni原子比为2∶1∶1的催化剂的稳定性最好。CuSnNi中不同金属原子与表面不饱和位点之间的强相互作用能调节不同金属原子的电子结构,并优化催化剂表面对不同中间产物的吸附和解吸强度。

关键词： 铜锡镍合金纳米颗粒; CO2电化学还原; 液相还原法; 可调节产物; 合成气; 甲酸

本文引用格式

张莹萍 , 宋逸剑 , 李维杰 , 周承商 , 刘咏 , 韩朝 . 快速合成超细CuSnNi纳米颗粒催化剂的CO2电化学还原性能[J]. 粉末冶金材料科学与工程, 2025 , 30(4) : 325 -342 . DOI: 10.19976/j.cnki.43-1448/TF.2025036

Abstract

Four groups of CuSnNi nanoparticle catalysts with ordered structures, ultra-small sizes, and Cu, Sn, Ni atomic ratios of 1∶1∶1, 2∶1∶1, 1∶2∶1, 1∶1∶2, respectively, were synthesized by liquid-phase reduction method to investigate their CO2 electrochemical reduction performance and catalytic mechanism. The results show that all four groups of catalysts can convert CO2 into syngas (CO+H2) and HCOOH, when the atomic ratio of Cu, Sn, and Ni is 2∶1∶1, the Faraday efficiency of the catalytic products HCOOH+CO up to 40%, with the selectivity of HCOOH up to 29%, and the molar ratio of H2/CO in the syngas keeps in the range of 4-5 in all the potential ranges. The H2/CO molar ratio of the catalyst with the ratio of 1∶1∶2 has the largest adjustable range (5-17). The H2/CO molar ratio is related to the elemental ratio, but not to the entropy. The catalyst with the atomic ratio of Cu, Sn, and Ni of 2∶1∶1 has the best stability. Strong interactions between different metal atoms and surface unsaturated sites in CuSnNi can modulate the electronic structure of different metal atoms and optimize the adsorption and desorption strength of different intermediates on the catalyst surface.

Key words： CuSnNi alloy nanoparticle; CO2 electrochemical reduction; liquid-phase reduction method; tunable product; syngas; formic acid

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