Xu Wenhao, Xiao Taishi, Chen Jie, Shu Junxiang, Li Jili, Ma Yao, Li Xiang, Zhong Zihan, Zhang Zitao, Li Yefei, Zhang Qing, Sun Zhengzong, Tang Yun
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China.
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, School of Microelectronics and State Key Laboratory of ASIC and System, Fudan University, Shanghai 200433, China.
ACS Appl Mater Interfaces. 2024 Oct 23;16(42):57162-57170. doi: 10.1021/acsami.4c12952. Epub 2024 Oct 14.
Copper (Cu)-based nanocatalysts play crucial roles in the electrochemical CO reduction reaction (ECORR) for sustainable energy resources. Particularly, Cu-based nanostructures incorporating Au and Ag are promising, offering enhanced activity, selectivity, and stability. However, precise control over the structure and composition of heterostructures remains challenging, hindering the development of highly efficient catalysts. Herein, we present a silver (Ag) transition-layer-mediated approach to synthesize ternary heterostructures with two specific morphologies, namely, Au/Ag-Cu-side and Au/Ag-Cu-tip, which exhibit different Ag-Cu interface epitaxial patterns. The two heterostructures achieve high C2 product selectivity in ECORR. Especially, the Au/Ag-Cu-side structure achieves 50.3% C2 selectivity with 35.5% ethanol, while the tip structure shows higher ethylene selectivity. Our study reveals the impact of the Ag layer in directing deposition sites on heterostructure growth and further facilitating the design of multicomponent Cu-based catalysts with enhanced structural integrity and ECORR performance.
铜（Cu）基纳米催化剂在用于可持续能源的电化学CO还原反应（ECORR）中起着关键作用。特别是，包含金和银的铜基纳米结构很有前景，具有增强的活性、选择性和稳定性。然而，对异质结构的结构和组成进行精确控制仍然具有挑战性，这阻碍了高效催化剂的开发。在此，我们提出了一种银（Ag）过渡层介导的方法来合成具有两种特定形态的三元异质结构，即Au/Ag-Cu侧和Au/Ag-Cu尖端，它们表现出不同的Ag-Cu界面外延模式。这两种异质结构在ECORR中实现了高C2产物选择性。特别是，Au/Ag-Cu侧结构实现了50.3%的C2选择性，其中乙醇含量为35.5%，而尖端结构显示出更高的乙烯选择性。我们的研究揭示了Ag层在引导异质结构生长的沉积位点方面的影响，并进一步促进了具有增强结构完整性和ECORR性能的多组分铜基催化剂的设计。
