Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (9): 2824.doi: 10.7503/cjcu20210408

• Physical Chemistry • Previous Articles     Next Articles

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.

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

CLC Number: 

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