journal article·2019-06-14

Electrochemical Nitrogen Reduction Reaction on Ruthenium

Yao Yao, Haijiang Wang, Xiao-zi Yuan, Hui Li, Minhua Shao

ACS Energy Letters· Volume 4· Issue 6
Publisher page

Abstract

Ruthenium is a good catalyst for ammonia synthesis in the Haber–Bosch process and a promising electrocatalyst for electrochemical N2 reduction reaction (NRR). However, the NRR pathway on Ru is unclear because of the lack of information on reaction intermediates. Surface-enhanced infrared absorption spectroscopy combined with electrochemical measurements is employed to study the NRR mechanisms on Ru thin film. During the nitrogen reduction, the *N2Hx (0 ≤ x ≤ 2) was detected with the band of N=N stretching (∼1940 cm–1) at potentials below 0.2 V in an N2-satureated HClO4 solution. The coverage of *N2Hx on the Ru surface was significantly increased with the potential decreasing from 0.2 to −0.4 V. The formed *N2Hx species could be oxidized at potentials higher than −0.1 V. In an N2-satureated KOH solution, no N-related infrared absorption band was observed on Ru surfaces, indicating that the adsorption of nitrogen molecules on Ru surfaces is very weak.
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Research context

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Caching and Content Delivery · Hydrogen Storage and Materials

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

Affiliations

Department of Materials Science and Engineering, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong 518055, China

Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Department of Mechanical and Energy Engineering, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong 518055, China

Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong 518055, China

Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong 518055, China

National Research Council Canada, Vancouver, BC V6T 1W5, Canada

Funding

Research Grants Council, University Grants Committee · Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Southern University of Science and Technology · Guangdong Innovative and Entrepreneurial Research Team Program · Shenzhen Science and Technology Innovation Committee · Development and Reform Commission of Shenzhen Municipality · Shenzhen Key Laboratory of Hydrogen Energy

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