journal article·2024-07-12

Modulation of Atomically Dispersed Ru Microenvironments by a Directed Etch Template Strategy for Efficient Nitrogen Fixation

Zhiya Han, Jiaxi Yuan, Gaijuan Guo, Yue Kang, Yixin Liu, Chunxia Zhou, Liping Tong, Binfeng Lu, Xiyang Liu, Quan Wang, Miaosen Yang, Senhe Huang, Boxu Feng, Sheng Han

ACS Applied Nano Materials· Volume 7· Issue 13
Publisher page

Abstract

The synthesis of ammonia (NH 3 ) via the Haber–Bosch process is energy-intensive and environmentally challenging, necessitating the development of sustainable alternatives. Herein, we report a directed etch template strategy to create atomically dispersed Ru–N 4 active sites within layered porous carbon (NC@Ru) for efficient electrochemical nitrogen reduction reaction (NRR). The removal of the MgO template results in an interconnected carbon network with hierarchical porous structures, significantly enhancing the accessibility and mass transfer of the active sites. The NC@Ru catalyst demonstrated superior NRR performance, achieving an ammonia yield rate of 196.2 μg h –1 mg cat. –1 and a Faradaic efficiency of 43.8%. In situ electrochemical mass spectrometry was employed to analyze NRR kinetics, while density functional theory calculations were utilized to elucidate the NRR mechanism and identify the rate-determining step. The work introduces a novel high-performance catalyst for electrocatalytic NRR and provides a practical strategy for optimizing active-site microenvironments, laying the groundwork for future commercial applications of electrocatalytic NRR.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Nanomaterials for catalytic reactions · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials, Shanghai Dianji University, No. 300, Shuihua Road, Pudong New Area, Shanghai 200245, China

Shanghai Engineering Reasearch Center of Spacialized Polymer Materials for Aerospace, Shanghai Aerospace Equipment Manufacturer Co., Ltd., Shanghai 200245, China

School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China

The Soft2D Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Funding

Ministry of Education of the People's Republic of China · Shanghai Municipal Education Commission · National Natural Science Foundation of China · Natural Science Foundation Project of Shanghai · High-end Special oils Technical Innovation Center of Shandong Province · Technical Standard Project of Shanghai · Industrial Collaborative Innovation Project of Shanghai

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