Hui-Juan Yang, Xu-Hong Yan, Cheng Yan, Zi-Qin Min, Lei Chai, Chun-Ran Wang, Li-Na Chen, Wei Xiao, Tao Wang, Chong Xie, Da-Wei Pang, Xi-Fei Li
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引用次数: 0
Abstract
N-doped carbon (NC) materials have emerged as attractive supports for metal-based catalysts, enhancing their catalytic performance through the metal–support interactions. However, gaining fundamental insights into the metal–support interaction between NC support and Sn metal sites for improving the electrocatalytic CO2 reduction reaction (CO2RR) performance remains challenging. Here, we reveal that pyridinic N in NC support indirectly induces the net electron distribution of Sn sites to exhibit optimal adsorption of HCOO* and HCOOH* by combining theoretical simulations and experiments, while pyrrolic N and graphitic N present weaker adsorption of HCOO* and stronger adsorption of HCOOH*, respectively. Consequently, the catalyst comprising NC with abundant pyridinic N loaded SnO2 quantum dots exhibits excellent CO2RR performance, achieving high partial formate activity (over 90 mA. cm−2 in an H-cell and 200 mA. cm−2 in a flow cell) and impressive Faradaic efficiency for formate (approximately 90%). This work provides valuable insights into intricate metal–support interactions, thereby offering guidance for the future design and development of CO2RR electrocatalysts.
期刊介绍:
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.