Wang, Honglei ; Jiao, Yunfei ; Wu, Bing ; Wang, Dong ; Hu, Yueqi ; Liang, Fei ; Shen, Chen ; Knauer, Andrea ; Ren, Dan ; Wang, Hongguang ; Aken, Peter A. van ; Zhang, Hongbin ; Sofer, Zdenek ; Grätzel, Michael ; Schaaf, Peter (2023)
Exfoliated 2D Layered and Nonlayered Metal Phosphorous Trichalcogenides Nanosheets as Promising Electrocatalysts for CO₂ Reduction.
In: Angewandte Chemie International Edition, 2023, 62 (17)
doi: 10.26083/tuprints-00023692
Artikel, Zweitveröffentlichung, Verlagsversion

Kurzbeschreibung (Abstract)

Two‐dimensional (2D) materials catalysts provide an atomic‐scale view on a fascinating arena for understanding the mechanism of electrocatalytic carbon dioxide reduction (CO₂ ECR). Here, we successfully exfoliated both layered and nonlayered ultra‐thin metal phosphorous trichalcogenides (MPCh₃) nanosheets via wet grinding exfoliation (WGE), and systematically investigated the mechanism of MPCh₃ as catalysts for CO₂ ECR. Unlike the layered CoPS₃ and NiPS₃ nanosheets, the active Sn atoms tend to be exposed on the surfaces of nonlayered SnPS₃ nanosheets. Correspondingly, the nonlayered SnPS₃ nanosheets exhibit clearly improved catalytic activity, showing formic acid selectivity up to 31.6 % with −7.51 mA cm⁻² at −0.65 V vs. RHE. The enhanced catalytic performance can be attributed to the formation of HCOO* via the first proton‐electron pair addition on the SnPS₃ surface. These results provide a new avenue to understand the novel CO₂ ECR mechanism of Sn‐based and MPCh₃‐based catalysts.

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