Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yuanjun Liu,Yiru Wu,Kunpeng Yang,Jun Yu,Junhao Zhang,Guoxing Zhu
Reasonable design of efficient and environmentally friendly alkaline hydrogen oxidation (HOR) electrocatalysts is urgently required for the development of alkaline hydrogen-oxygen fuel cells. In this work, carbon dots (CDs) were coupled with ruthenium (Ru) to form a hybrid Ru/CDs electrocatalyst. The combination of CDs with Ru nanoparticles can effectively inhibit the aggregation of Ru nanoparticles. Moreover, the electronic structure of Ru is modified due to the interaction between Ru and CDs. The optimized Ru/CDs catalyst exhibited excellent alkaline HOR activity with an exchange current density of 1.56 mA cm −2 that is significantly better than commercial Pt/C catalysts. These findings considerably broaden the potential applications of CDs and provide additional options for the development of high-performance HOR electrocatalysts.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2024
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IF 5.5
Jianchao Yue,Pengyu Han,Xinyi Yang,Xiaoqin Ma,Yu Zhang,Liqing Wu,Jianchuan Wang,Wei Luo
Designing non-Pt-based electrocatalysts with high catalytic activity is challenging but extremely desirable for alkaline hydrogen oxidation reaction (HOR). Herein, we successfully design a nitrogen doped carbon shell coated Ru nanoparticles (Ru@NC) catalyst for efficient alkaline HOR. The obtained Ru@NC exhibits an excellent mass activity of 1.279 mA μg PGM -1 , which is 8.1-times, 10.3-times and 3.7-times higher than that of Ru@C, Ru/C and commercial Pt/C. When further employed as the anode catalyst for anion exchange membrane fuel cells (AEMFCs), a peak power density of 1.114 W cm -2 can be achieved for Ru@NC. Density functional theory (DFT) calculations and experimental results indicate that the hydroxyl binding energy (OHBE) is continually enhanced on the catalysts due to the encapsulation of carbon shell and nitrogen doping derived from the upshifted d-band center of Ru sites in catalysts, which is responsible for the enhanced alkaline HOR performance.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2023
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IF 17.1
Liyuan Wang,Shuang Meng,Chongyang Tang,Changhong Zhan,Shize Geng,Kezhu Jiang,Xiaoqing Huang,Lingzheng Bu
The development of high-performance platinum (Pt)-based electrocatalysts for the hydrogen oxidation reaction (HOR) is highly desirable for hydrogen fuel cells, but it is limited by the sluggish kinetics and severe carbon monoxide (CO) poisoning in alkaline medium. Herein, we explore a class of facet-selected Pt–nickel–indium fishbone-like nanowires (PtNiIn FNWs) featuring high-index facets (HIFs) of Pt3In skin as efficient alkaline HOR catalysts. Impressively, the optimized Pt66Ni6In28 FNWs show the highest mass and specific activities of 4.02 A mgPt–1 and 6.56 mA cm–2, 2.0/2.1 and 13.9/15.6 times larger than those of commercial PtRu/C and commercial Pt/C, respectively, along with a competitive CO-tolerance ability. Specifically, they exhibit only 6.0% current density decay after 10000 s of operation and 25.7% activity loss after 2000 s in the presence of 1000 ppm of CO. Moreover, an isotope experiment and density functional theory (DFT) calculations further prove that the unique structure and synergy among Pt, Ni, and In endow these Pt66Ni6In28 FNWs with an optimized hydrogen binding energy (HBE) and an advantageous hydroxide binding energy (OHBE), giving them excellent alkaline HOR properties. The combined construction of surface-skin and HIFs in PtNiIn FNWs will offer an available method to realize the potential applications of advanced non-PtRu-based catalysts in fuel cells and beyond.
研究领域:
材料科学
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电化学
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催化
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Yi Liu,Lianrui Cheng,Shuqing Zhou,Chenggong Niu,Tayirjan Taylor Isimjan,Xiulin Yang
Exploiting a cost-effective electrocatalyst for hydrogen oxidation reaction (HOR) with high-performance and CO poisoning resistance is essential for the widespread application of alkaline anion exchange membrane fuel cells (AEMFCs). Herein, we craft a unique Ru-RuP 2 heterostructure within hollow mesoporous carbon sphere (Ru-RuP 2 @C) using phosphide-controlled phase-transition approach. Benefiting from the interfacial electron transfer from RuP 2 to Ru, the Ru-RuP 2 @C electrocatalyst exhibits impressive HOR performance with a mass activity of 2.87 mA μ g Ru − 1 . Notably, Ru-RuP 2 @C demonstrates strong tolerance to 1000 ppm CO, a capability lacking in PtRu/C and Pt/C. When serves as an anode catalyst for AEMFC, it achieves a peak power density of 521 mW cm −2 , comparable to Pt/C. Experimental and theoretical analyses reveal that the built-in electric field, resulting from work function differences, creates an asymmetric charge distribution that modulates the d -band center of Ru-RuP 2 @C. This optimizes the adsorption strength of hydrogen and hydroxide intermediates, thereby accelerating HOR catalytic kinetics.
研究领域:
电化学
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材料科学
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能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）