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Shang M, Zhou B, Qiu H, Gong Y, Xin L, Xiao W, Xu G, Dai C, Zhang H, Wu Z, Wang L. Self-supported Ru-Fe-O x nanospheres as efficient electrocatalyst to boost overall water-splitting in acid and alkaline media. J Colloid Interface Sci 2024; 669:856-863. [PMID: 38749224 DOI: 10.1016/j.jcis.2024.05.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 05/27/2024]
Abstract
Developing electrocatalysts with high activity and durability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes remains challenging. In this study, we synthesize a self-supported ruthenium-iron oxide on carbon cloth (Ru-Fe-Ox/CC) using solvothermal methods followed by air calcination. The morphology of the nanoparticle exposes numerous active sites vital for electrocatalysis. Additionally, the strong electronic interaction between Ru and Fe enhances electrocatalytic kinetics optimization. The porous structure of the carbon cloth matrix facilitates mass transport, improving electrolyte penetration and bubble release. Consequently, Ru-Fe-Ox/CC demonstrates excellent catalytic performance, achieving low overpotentials of 32 mV and 28 mV for HER and 216 mV and 228 mV for OER in acidic and alkaline electrolytes, respectively. Notably, only 1.48 V and 1.46 V are required to reach 10 mA cm-2 for efficient water-splitting in both mediums, exhibiting remarkable stability. This research offers insights into designing versatile, highly efficient catalysts suitable for varied pH conditions.
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Affiliation(s)
- Mengfang Shang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Bowen Zhou
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Huiqian Qiu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Yuecheng Gong
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Liantao Xin
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Weiping Xiao
- College of Science, Nanjing Forestry University, Nanjing 210037, PR China
| | - Guangrui Xu
- College of Materials Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China
| | - Chunlong Dai
- Shandong Long Antai Environmental Protection Technology Co., Ltd., No. 9, Gongye 1st Street, Xiashan High-tech Project Zone, Weifang, PR China
| | - Huadong Zhang
- Shandong Long Antai Environmental Protection Technology Co., Ltd., No. 9, Gongye 1st Street, Xiashan High-tech Project Zone, Weifang, PR China
| | - Zexing Wu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China.
| | - Lei Wang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, College of Polymer Science and Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, 266042 Qingdao, PR China.
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Sun W, Sahin NE, Sun D, Wu X, Munoz C, Thakare J, Aulich T, Zhang J, Hou X, Oncel N, Pierce D, Zhao JX. One-Pot Synthesis of Ruthenium-Based Nanocatalyst Using Reduced Graphene Oxide as Matrix for Electrochemical Synthesis of Ammonia. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1115-1128. [PMID: 36575897 DOI: 10.1021/acsami.2c18413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Conventional ammonia production consumes significant energy and causes enormous carbon dioxide (CO2) emissions globally. To lower energy consumption and mitigate CO2 emissions, a facile, environmentally friendly, and cost-effective one-pot method for the synthesis of a ruthenium-based nitrogen reduction nanocatalyst has been developed using reduced graphene oxide (rGO) as a matrix. The nanocatalyst synthesis was based on a single-step simultaneous reduction of RuCl3 into ruthenium-based nanoparticles (Ru-based NPs) and graphene oxide (GO) into rGO using glucose as the reducing agent and stabilizer. The obtained ruthenium-based nanocatalyst with rGO as a matrix (Runano-based/rGO) has shown much higher catalytic activity at lower temperatures and pressures for ammonia synthesis than conventional iron catalysts. The rGO worked as a promising promoter for the electrochemical synthesis of ammonia due to its excellent electrical and thermal conductivity. The developed Runano-based/rGO nanocatalyst was characterized using transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), ultraviolet-visible (UV-vis) absorption spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray photoelectron spectroscopy (XPS). The results demonstrated that the size of the Ru-based NPs on the surface of rGO was 1.9 ± 0.2 nm and the ruthenium content was 25.03 wt %. Bulk electrolysis measurements were conducted on thin-layer electrodes at various cathodic potentials in a N2-saturated 0.1 M H2SO4 electrolyte at room temperature. From the chronoamperometric measurements, the maximum faradic efficiency (F.E.) of 2.1% for ammonia production on the nanostructured Runano-based/rGO electrocatalyst was achieved at a potential of -0.20 V vs reversible hydrogen electrode (RHE). This electrocatalyst has attained a superior ammonia production rate of 9.14 μg·h-1·mgcat.-1. The results demonstrate the feasibility of reducing N2 into ammonia under ambient conditions and warrant further exploration of the nanostructured Runano-based/rGO for electrochemical ammonia synthesis.
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