In-situ growth of ruthenium-based nanostructure on carbon cloth for superior electrocatalytic activity towards HER and OER

You, Mingzhu; Du, Xin; Hou, Xinghui; Wang, Zeyuan; Zhou, Ying; Ji, Haipeng; Zhang, Liying; Zhang, Zhongtao; Yi, Shasha; Chen, Deliang

doi:10.1016/j.apcatb.2022.121729

Cited by 102 publications

(40 citation statements)

References 61 publications

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“…Then, the rate-determining step for prepared electrocatalysts was also identified by the OER mechanism, and it represents the dominance of the Volmer reaction. Therefore, a low Tafel slope links to a more rapid electrochemical performance, which promotes the OER activity . Using chronoamperometry test, we have analyzed the stability of the best electrocatalysts for the OER and it exhibited excellent stability over 1 h, which is confirmed in Figure d.…”

Section: Resultsmentioning

confidence: 61%

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Swathi

Yuvakkumar

Ravi

et al. 2023

ACS Appl. Nano Mater.

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Transition metal sulfides are widely employed as bifunctional electrocatalysts owing to their unique structural features, well-off active sites, and modifiable electronic and mechanical properties. Herein, we have synthesized highly efficient ternary copper iron sulfide (CuFeS 2 )/reduced graphene oxide (rGO) composites via a hydrothermal approach for an overall water splitting process. The tetragonal structure of CuFeS 2 microflowers anchored on rGO sheets is identified by using Xray analysis and compared with standard Joint Committee on Powder Diffraction Standards (JCPDS) #35-752. In Raman spectra, the existence of two bands D (defects) and G (graphitic) confirms the presence of the rGO composite with CuFeS 2, and the ratio of D and G band (I D /I G ) is observed to be 1.18. The morphological analysis using scanning electron microscopy and transmission electron microscopy substantiates the formation of microflowers with rGO sheets. The elemental composition of CuFeS 2 /rGO was analyzed by energy-dispersive X-ray analysis, which demonstrated a weight percentage of various compositions of Cu (18.07%), Fe (11.32%), S (13.88%), and C (56.74%). Moreover, the CuFeS 2 /rGO composites exhibited a high surface area, pore volume, and diameter of 50.352 m 2 /g, 0.162 cc/g, and 2.471 nm, respectively. The fabricated electrodes were examined by using electrochemical characterization. The obtained results clearly showed low overpotential and low Tafel slope values in both the oxygen evolution reaction (OER) (176 mV and 216 mV/dec) and hydrogen evolution reaction (HER) (153 mV and 150 mV/dec) processes. In addition, the fabricated composite exhibited low 1.59 V cell voltages for an overall water splitting process with more excellent stability, and it showed a faradaic efficiency of 97.8% for H 2 and 95.5% for O 2 . Therefore, the composite of rGO in ternary metal sulfide plays a predominant role in improving the electrocatalytic activity of the material, and the CuFeS 2 /rGO composite emerges as a promising electrode for the water splitting process.

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Section: Resultsmentioning

confidence: 61%

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Swathi

Yuvakkumar

Ravi

et al. 2023

ACS Appl. Nano Mater.

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“…5a, the overpotentials of the Co-N-C nanosheets, fresh RuSe 2 , fresh In addition, the Tafel slope reflects the reaction kinetics of the electrocatalyst, with a lower Tafel slope representing a faster HER process. 41 As shown in Fig. 5c To further explore the activity of the electrocatalyst, the electrochemically active area (ECSA) of the material is assessed by the bilayer capacitance (C dl ) 45 which is obtained from CV measurements in the non-Faraday region at different sweep rates (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the Tafel slope reflects the reaction kinetics of the electrocatalyst, with a lower Tafel slope representing a faster HER process. 41 As shown in Fig. 5c, RuSe 2 /Co–N–C-5 (53.2 mV dec −1 ) has a lower Tafel slope than RuSe 2 /N–C-5 (73.5 mV dec −1 ), fresh RuSe 2 (103.6 mV dec −1 ), RuSe 2 –400 (77.9 mV dec −1 ), fresh RuSe 2 /Co–N–C-5 (119.0 mV dec −1 ) and Co–N–C (110.5 mV dec −1 ), confirming that RuSe 2 /Co–N–C-5 possesses faster reaction kinetics and higher catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Shi

Zhan

et al. 2023

CrystEngComm

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“…As shown in Figure S6, double-layer capacitances ( C dl ), quantitative estimation of active sites, were 11.9, 5.2, 4.0, and 13.1 mF cm –2 for Ir/CNT, Pd 0.34 @Ir 0.66 /CNT, Pd 0.66 @Ir 0.34 /CNT, and Pd 0.5 @Ir 0.5 /CNT, respectively. The electrochemical surface area of Pd 0.5 @Ir 0.5 /CNT was increased by 1.1 times than the counterpart of Ir/CNT, suggesting that the core–shell structure boosted the utilization efficiency of Ir . Moreover, as shown in Figure b, a higher specific activity, normalizing OER activity with C dl , was recorded for Pd 0.5 @Ir 0.5 /CNT, reaching 9.9 A F –1 at an overpotential of 370 mV, increased by 2.2 times that of Ir/CNT, implying better catalytic activity of the single active site in Pd 0.5 @Ir 0.5 /CNT.…”

Section: Resultsmentioning

confidence: 99%

Modulation in the d Band of Ir by Core–Shell Construction for Robust Water Splitting Electrocatalysts in Acid

Xie

Chang

Luo

et al. 2023

ACS Appl. Mater. Interfaces

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The realization of commercialization of proton electrolyte membrane water splitting technology significantly depends on the anodic electrocatalyst working at a high potential and strong acidic conditions requiring superior oxygen evolution reaction activity and stability. In this work, we devise the construction of ultrasmall Pd@Ir core−shell nanoparticles (5 nm) with atomic layer Ir (3 atomic layers) on carbon nanotubes (Pd@Ir/CNT) as an exceptional bifunctional electrocatalyst in acidic water splitting. Due to the core−shell structure, strain generated at heterointerfaces leads to an upshifted d band center of Ir atoms contributing to a 62-fold better mass activity at 1.63 V vs RHE than commercial IrO 2 ; besides, the electronic hybridization suppresses the electrochemical dissolution of Ir; as a result, robust stability is also achieved. In hydrogen evolution reaction catalysis, Pd@Ir/CNT exhibits a 3.7 times higher mass activity than Pt/C. Furthermore, only 1.7 V is required to reach a water splitting current density of 100 mA cm −2 , 251 mV lower than that of Pt/ C−IrO 2 , indicating its superiority in acidic water splitting.

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In-situ growth of ruthenium-based nanostructure on carbon cloth for superior electrocatalytic activity towards HER and OER

Cited by 102 publications

References 61 publications

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Modulation in the d Band of Ir by Core–Shell Construction for Robust Water Splitting Electrocatalysts in Acid

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In-situ growth of ruthenium-based nanostructure on carbon cloth for superior electrocatalytic activity towards HER and OER

Cited by 102 publications

References 61 publications

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Anchored RuSe2nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Modulation in the d Band of Ir by Core–Shell Construction for Robust Water Splitting Electrocatalysts in Acid

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Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution