高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (9): 2824.doi: 10.7503/cjcu20210408

• 物理化学 • 上一篇    下一篇

海胆针状金纳米颗粒用于电催化二氧化碳还原

张想, 谢旭岚, 熊力堃, 彭扬()   

  1. 苏州大学能源与材料创新研究院, 能源学院, 江苏省先进碳材料与可穿戴能源技术重点实验室, 苏州 215006
  • 收稿日期:2021-06-16 出版日期:2021-09-10 发布日期:2021-09-08
  • 通讯作者: 彭扬 E-mail:ypeng@suda.edu.cn
  • 基金资助:
    国家自然科学基金(22072101);江苏省高校自然科学研究重大项目(18KJA480004);江苏省六大人才高峰计划项目(TD-XCL-006);江苏高校优势学科建设工程项目资助

Urchin-like Gold Nanoneedle for Efficient Electrocatalytic CO2 Reduction

ZHANG Xiang, XIE Xulan, XIONG Likun, PENG Yang()   

  1. Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province,Soochow Institute for Energy and Materials Innovations,College of Energy,Soochow University,Suzhou 215006,China
  • Received:2021-06-16 Online:2021-09-10 Published:2021-09-08
  • Contact: PENG Yang E-mail:ypeng@suda.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22072101);the Natural Science Research Project ofJiangsu Higher Education Institutions of China(18KJA480004);the Six Talent Peaks Project in Jiangsu Province,China(TD?XCL?006);the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions,China.

摘要:

采用不加表面活性剂的种子介导生长策略合成了具有针状结构的金纳米颗粒, 其针尖处的尖端电场效应能有效富集电解质阳离子并提高二氧化碳局部浓度, 从而提高催化剂的电流密度和一氧化碳选择性, 在 -0.6 V(vs. RHE)时的法拉第效率可以达到96%. 电化学性能测试结果表明, 其高选择性不仅来源于丰富的表面缺陷, 更主要源于其独特的针状结构所带来的尖端电场效应.

关键词: 电催化二氧化碳还原, 种子介导, 反应动力学, 尖端电场效应

Abstract:

Electrocatalytic CO2 reduction is one of the effective strategies to solve today’s energy and environmental crisis, in which reducing CO2 to CO is the first and the most critical step. However, the low solubility of CO2 in electrolyte greatly limits its reaction dynamics and product selectivity. In this work, a seed-mediated growth method without any surfactants was applied to synthesize gold nanoparticles with an urchin-like structure. The electric field at the tip of the needle can effectively enrich electrolyte cations and increase the local concentration of CO2, thereby increasing the current density and Faraday efficiency(FECO) of the catalyst, which can reach 96% at -0.6 V(vs. RHE). Electrochemical performance tests have also shown that the high selectivity is attributed to its unique needle structure and surface defects.

Key words: Electrocatalytic CO2 reduction, Seed-mediated growth method, Reaction dynamics, Tip electric field effect

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